JP2015022644A - Determination support system for production schedule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out determination of an efficient production schedule.SOLUTION: A determination support system for production schedule is composed to carry out determination work of the production schedule by: having a production schedule area A1 displayed on a display; having a group to which a selected production item belongs and a group row including the group displayed to a group index area A3 when an operator selects a production item arranged in the production schedule area A1; having the production item belonging to the group row displayed in the group index area A3 when the operator selects one of the group rows indicated in the group index area A3; and having the production item displayed in the group index area A3 arranged in the production schedule area A1.

Description

  The present invention relates to a system that supports a work for determining a production schedule when various products are manufactured.

  For example, in the steel making process, slabs for various users are manufactured using a continuous casting apparatus. When casting slabs continuously, as the slabs to be connected (the slabs of the post-charge connected to the slabs of the pre-charge), for example, the components of the steel grade are almost the same or the delivery date is the same. A slab to be connected is selected as a connection target. In particular, by selecting materials with similar steel grades, it is possible to reduce the number of crops (parts where the components do not meet the specified values and must be discarded) as much as possible. In some cases, the speed may be approximately the same.

  In addition, as described above, not only setting a relatively close production order such as slabs before and after being connected, but also a production order of slabs in units of several hours to several days consider various information from a wide viewpoint. There is a need. For example, if steel grades with the same or similar steel grade components are selected and kept connected preferentially, not only do many steel grade components remain, but priority is given to the proximity of the steel grade components. There is a risk that many things that are close to delivery will remain. Therefore, it is necessary to set a production schedule that combines the connections of steel types in a well-balanced manner.

In other words, in order to set up an efficient slab production in a continuous casting machine, that is, an efficient production schedule, the delivery date of the slab that has been ordered, the possibility of connection between slabs (steel types), It is necessary to consider various information such as trouble information from a wide range of viewpoints.
As a technique for determining a production schedule efficiently, there exist some which were indicated by patent documents 1-8.

  Patent document 1 casts steel products of a plurality of standards in units of cast, and the steel products of the plurality of standards are manufactured by casting a steel product of a lower standard by tying it with a steel product of a higher standard. A cast knitting device in the process, wherein at least a standard of the steel product to be cast and a casting data storage means for storing casting data including a weight for each standard of the steel product to be cast, and the steel products of the plurality of standards, Standard information storage means for storing standard information about steel products of a standard that can be tied together, and a cast knitting unit that performs knitting of casts based on the casting data, the standard information, and a predetermined index Disclosed are a cast knitting apparatus and a cast knitting method.

  Patent Document 2 is a cast knitting apparatus that performs cast knitting by rearranging charges and deciding the order of casting in a continuous casting facility when continuously casting steel products of a plurality of standards. Charge information based on the order information, charge information storage means for storing the set charge information, product standard storage means for storing a standard that can be combined with a steel product standard of the order information, and the charge information Based on the charge information stored in the storage means and the standards that can be combined and stored in the product specification storage means, the number of charges that can be cast one after another without interrupting the molten steel for charge information that can be combined and cast When maximizing the maximum charge, each charge is represented by a node, and the charge that can be cast together is represented by a directional branch. A network generation unit that generates a workpiece, stores the generated network in a network storage unit, reads the network stored in the network storage unit, searches for a route that is the longest cast knitting on the network, and performs the longest cast knitting. Disclosed is a cast knitting apparatus and a cast knitting method characterized by comprising a longest cast search means for determining and storing the determined longest cast knitting in a cast knitting storage means.

  Further, in Patent Documents 3 to 8, the cast is knitted to obtain the amount of steel to be produced for each steel type, casting process, and daily combination, the cast in consideration of the casting quality is knitted, the components of the steel type A cast knitting apparatus and a cast knitting method for knitting a cast by charging together for each are disclosed.

JP 2006-159274 A JP 2012-11451 A JP 2008-293475 A JP-A-6-247516 JP-A-5-285501 Japanese Patent Laid-Open No. 2000-5854 Japanese Patent Laid-Open No. 7-88605 JP-A-6-328212

  An operator in the continuous casting apparatus determines a production schedule of a slab that can avoid troubles, reduce productivity, and reliably keep the delivery date. At this time, if it is an experienced operator, various past experiences are judged in parallel from a wide range of viewpoints such as delivery date of cast slabs ordered, possibility of connection of steel grades, past trouble information, etc. Thus, a desired production schedule can be determined.

However, it is often difficult for an inexperienced operator to determine the production schedule described above. In fact, even an experienced operator requires a great amount of time, such as several hours, to create a production schedule.
Even if it is going to employ | adopt the technique of patent document 1-patent document 8 in order to improve this situation, it does not seem to be applicable to the efficient production schedule determination in a steelmaking process.

  The technology of Patent Document 1 calculates “ease of tying (combination) of steel types” and “ease of operation of steel types” based on the casting data of steel types, steel type standards, etc. It is a technology related to a program for casting casting (production schedule) in order, and merging and casting lower-grade steel products and higher-grade steel products, but the steel types are almost the same in the front and rear charges (production units). There are no steel types that have the same pattern (how to connect different steel types in a continuous casting process), crop amount, and delivery date.

The technology of Patent Document 2 is also a technology related to a program for creating a graph of the possibility of tying between steel types and performing cast knitting with the graph, but the steel types are almost the same in the front and rear charges (production units). , Steel types that have the same pattern (how to connect different steel types continuously), crop amount, and delivery date are not selected.
The technologies of Patent Literature 3 to Patent Literature 8 are also technologies related to a program for performing cast knitting, but a rough plan for a production schedule is determined, steel types having different qualities are connected based on conditions, and have already been created. The work of changing the cast is performed, and the same steel type or similar steel types are not connected to determine an efficient production schedule.

That is, Patent Documents 1 to 8 do not disclose a technique that can be applied to an efficient production schedule creation operation in a continuous casting machine.
By the way, even an inexperienced operator can select one or a plurality of slabs from a plurality of slab groups that have been ordered based on some information when determining a production schedule. It may be. However, it may be difficult to determine in what order in the production schedule and in which position (order in the schedule) the selected slab should be taken. Patent Documents 1 to 8 do not disclose a technology capable of constructing a support system that can avoid such a situation, in other words, a support system that can give detailed instructions and suggestions to inexperienced operators.

In other words, at present, the technology for determining the production schedule in the continuous casting machine has not been developed, and the production schedule creation work is performed based on the human work that relies on the experience of the operator. It ’s true.
Therefore, in view of the above problems, the present invention provides a determination work support system that can determine an efficient production schedule without depending on the degree of experience of an operator when manufacturing various products. The purpose is to provide. In particular, when determining the production schedule, the order of the group (steel grade group) to which the production item connected before and after the production item belongs is displayed for the production item (steel grade) of interest, and the operator displays this display information. Provided is a support system capable of reliably determining an efficient production schedule while referring to it.

In order to achieve the above-described object, the present invention takes the following technical means.
A production schedule determination support system according to the present invention is a production schedule determination work support system used in a process of manufacturing a product by continuously processing production units, and the support system is a display that can be confirmed by an operator. And an input device that can be operated by the operator. The display unit displays a “production schedule area” in which production items indicating the contents of production units are arranged in the order of processing, and is arranged in the production schedule area. When the operator selects the selected production item, the group index to which the selected production item belongs and the group column including the group index are displayed in the “group index area”, and the group indicated in the group index area is displayed. When one of the columns is selected by the operator, the production items belonging to the group column are displayed in the “group index area”. Appears in ", place the production items displayed on the group indication area in the production schedule area, characterized in that it is configured to perform operation of determining the production schedule.

Preferably, a “production priority area” for displaying the production item according to the priority of the production unit is displayed on the display.
Preferably, the group index and the production items belonging to the group index may be obtained from production results.
Preferably, the group index and the production items belonging to the group index are selected by applying a cluster analysis method to the production results.

  Preferably, in the group index area, a group index to which a production item arranged in the production schedule area belongs, a group index to which a production item arranged in the production priority area belongs, the production schedule area and production priority A group index to which a production item different from the production item displayed in the time area belongs is displayed, and at least one of the displayed group indices may be displayed differently.

  Preferably, the group index area includes a group column composed only of group indexes to which the production items arranged in the production schedule area belong, a group index to which the production items arranged in the production schedule area belong, and A group column composed of a group index to which a production item arranged in the production priority area belongs, a group index to which a production item arranged in the production schedule area belongs, and a production item arranged in the production priority area And a group column composed of a group index to which a production item different from the production items displayed in the production schedule area and the production priority area belongs, and the displayed group At least one indicator should be displayed differently .

  According to the production schedule determination support system of the present invention, when manufacturing various products, an efficient production schedule can be determined regardless of the degree of experience of the operator. In particular, when determining the production schedule, the order of the group (steel grade group) to which the production item connected before and after the production item belongs is displayed for the production item (steel grade) of interest, and the operator displays this display information. It is possible to reliably determine an efficient production schedule while referring to it.

It is a perspective view which shows the outline of a continuous casting apparatus. It is the figure which showed roughly the decision support system of the production schedule. It is the figure which showed an example of the screen displayed on a support monitor. It is the figure which showed a mode that a production schedule was determined using the screen (group parameter | index area) displayed on the support monitor in 1st Embodiment. It is the figure which expanded and showed the group parameter | index area screen displayed on the assistance monitor in 1st Embodiment. It is the figure which showed a mode that a production schedule was determined using the screen (group parameter | index area) displayed on the support monitor in 1st Embodiment. It is the figure which showed a mode that a production schedule was determined using the screen (group index area) displayed on the support monitor in 2nd Embodiment. It is the figure which expanded and showed the group parameter | index area screen displayed on the assistance monitor in 2nd Embodiment. It is the figure which showed a mode that a production schedule was determined using the screen (group index area) displayed on the support monitor in 2nd Embodiment.

Hereinafter, an embodiment of a production schedule determination support system 10 (hereinafter also simply referred to as a support system 10) according to the present invention will be described with reference to the drawings.
The support system 10 of the present invention supports the work of determining a production schedule when various products are manufactured in an ironworks, and the target of application is to continuously produce various production units (production tasks). A process is conceivable.

Hereinafter, as an embodiment, a process for continuously producing various slabs 3 using the continuous casting apparatus 1 for producing the slab 3 in the steelmaking process is taken as an example, and the production schedule in the continuous casting apparatus 1 is determined. The support system 10 to support is demonstrated.
A continuous casting apparatus 1 shown in FIG. 1 is a vertical bending type slab continuous casting apparatus 1, and a slab 3 drawn from the lower end of a mold 2 is initially drawn in a vertical direction. It is gently bent while being supported and pulled out in the horizontal direction.

The continuous casting apparatus 1 includes a tundish 5 that temporarily stores molten steel and injects the molten steel into a mold 2, a mold 2 to be cast, and a plurality of support rolls 4 that support and transfer a slab 3 such as a slab that has come out of the mold 2. Have.
In such a continuous casting apparatus 1, the molten steel carried by the ladle is poured into the tundish 5 and injected into the mold 2 through the immersion nozzle 6 provided in the tundish 5. In the mold 2, the injected molten steel is cooled (primary cooling), and only the surface portion of the molten steel becomes a slab 3 in a solidified state, and is drawn out from the lower part of the mold 2.

  The slab 3 drawn out in the vertical direction is gradually curved in the horizontal direction while being held by the support rolls 4, and the slab 3 that has become horizontal is obtained by a gas cutter (not shown) provided on the downstream side. It is divided into slabs 3. In addition, in the continuous casting apparatus 1, not only casting of the same steel type is performed continuously, but molten steels having different steel types are continuously supplied, and slabs 3 having different components may be manufactured in series.

  Now, as shown in FIG. 3, when performing casting with the continuous casting apparatus 1, a plurality of charges (production units) are processed in a preset order. This charge is associated with contents (production items) such as a model number, a steel type (steel type name), a special element value, and a delivery date as one processing unit. A charge casting order is determined for each date (for each casting date). In addition, 10-30 charge castings are performed per day. One charge is manufactured as a slab 3 by casting about 200 tonnes of molten steel. The steel types to be cast are basically many repeat products (products that are repeatedly ordered), and relatively few steel types are newly ordered. Therefore, the product mix of the steel types to be produced does not change significantly, but the delivery date and the number of production change.

  Thus, in order to determine the order of each charge from a plurality of charges, for example, the slab 3 having the same steel grade or the same delivery date may be selected for the preceding and following charges. In particular, when the steel types close to each other are selected, the number of crops can be reduced as much as possible, and the casting speed can be made substantially the same. As described above, when casting the slab 3, it is preferable to determine the production schedule in consideration of various conditions of charge before and after.

  In other words, the operator M who controls the continuous casting apparatus 1 considers the delivery date of the slab 3 that has been ordered, the possibility of connection between the slabs 3 (steel types), past trouble information, etc., from numerous charges. It is necessary to determine the production schedule. However, it may be difficult for an inexperienced operator M to quickly select an appropriate charge from a number of charges and determine the overall production schedule.

Therefore, the support system 10 of the present embodiment is configured to clearly display the priority with respect to the charge that is a production unit in the continuous casting apparatus 1 without depending on the degree of experience of the operator M. An appropriate production schedule can be set.
Hereinafter, before explaining the production schedule determination support system 10 of the continuous casting apparatus 1 according to the present embodiment, the configuration and operation mode of the basic production schedule determination support system 10A will be described. The basic support system 10A is a system included in the support system 10 of the present invention.

As shown in FIG. 2, the basic decision support system 10A is an off-line system provided separately from the operation system for controlling the continuous casting apparatus 1, and includes a display 11 (support monitor) that can be confirmed by the operator M. And an input device 12 that can be operated by the operator M.
The support monitor 11 includes a liquid crystal monitor and a CRT monitor, and is installed in the control room. The operator M can visually recognize the support monitor 11 as necessary. Information displayed on the support monitor 11 is determined by a production schedule determination model stored in the computer 13. This production schedule determination model is stored in a storage device configured with a hard disk in a form such as configured with spreadsheet software or programmed with a program language. The production schedule determination model is calculated by an arithmetic device configured by an MPU or the like, and information to be displayed on the support monitor 11 is determined.

The computer 13 includes an input device 12 for capturing an instruction to the computer 13 and an external signal, and an output device for displaying a calculation result. Examples of the input device 12 include a mouse, a keyboard, and a touch panel that can be operated by the operator M, and an output device is the support monitor 11 described above.
As shown in FIG. 2, when the operator M operates the input device 12 (mouse), items relating to the production schedule arranged on the support monitor 11, that is, production items indicating the contents of production units (model number, steel type, The production schedule can be determined on the support monitor 11 by redeploying the pattern, crop amount, special element value, delivery date, etc.) on the support monitor 11.

As shown in FIG. 3, the support monitor 11 is set with a production schedule area A1 in which production items are arranged in the order of processing, and a production priority area A2 in which production items are displayed according to the priority of production units. The lower part of the screen of the support monitor 11 is a production priority area A2, and the upper part of the production priority area A2 is a production schedule area A1.
In the production priority area A2, production items whose production unit priorities (production priorities) are evaluated using two or more parameters are arranged according to the production priorities. In this embodiment, delivery date and productivity are adopted as parameters. In addition, the size of the slab 3 etc. can be considered as another parameter.

  Specifically, the horizontal axis of the production priority area A2 indicates the delivery date (first parameter), which means that the delivery date is longer (the time until delivery is longer) toward the right side. The vertical axis of the production priority area A2 indicates the productivity (second parameter), which means that the productivity is worse toward the upper side. Low productivity here means that there are many points to be noted when performing production, such as many conditions that must be strictly observed when continuously casting, and that it is difficult to perform continuous casting easily. ing.

  Looking at the production priority area A2, the delivery time is shorter and the productivity is worse as it goes to the upper left, and it is better to process earlier. It can be said that the production priority is higher from the whole production, and go to the lower right The longer the delivery date and the higher the productivity, the lower the production priority in terms of the overall production. That is, in the production priority area A2, a part of the area (for example, the upper left) is a region with a high production priority, and another part of the area (for example, the lower right) has a low production priority. The production item is arranged in an area corresponding to the evaluated production priority.

  Note that the continuous casting of two steel grades has problems in productivity and quality, while the other two steel grades have no problem in productivity and quality, and the relationship between productivity and steel grade is determined in advance. The relationship between properties and steel grades is recorded in the database. The relationship between the productivity and the steel type recorded in this database is sent to the production schedule determination model in the computer 13.

  Note that on the actual screen of the support monitor 11, the production items displayed in the production priority area A2 are colored. The coloring of the production item expresses the difficulty of production by visual information and is a production priority parameter (third parameter). For example, the charge production items shown in red are charges in which the types of steel that can be connected (slab 3) are limited or the casting end speed is strictly determined, and production is more difficult than other steel types. It is. Note that the third parameter is not limited to the one expressed by color, and may be anything that allows the degree of production priority to be recognized visually. For example, the size, type, and font of the displayed characters may be different. You may express by.

In the production schedule area A1, the production schedule for each date is shown from left to right. On the same date, production items (contents of production units) are arranged in order from the upper side to the lower side. In addition, it is not limited for every date from left to right, and may be switched at some interval such as every tundish change.
As shown in FIG. 3, not only “steel type” is described as a production item in the production schedule area A1, but also “steel type” when a pre-production item and a post-production item corresponding to the selected production item are manufactured. Connection method (preferred connection method or maximum connection method when the corresponding steel grade is continuously manufactured) "or" crop amount (components that do not meet the specified values at the connection part of the slabs and must be discarded) Amount) ”etc. are also displayed.

  Specifically, in the second row (second column from the top) of the production schedule area A1, the model number, steel type name, steel type connection method, crop amount, special element value, delivery date, etc. are displayed in order from the left. Has been. For example, for the connection method of steel types, the sequence block (SB) method (a method of inserting a block called SB between the molten steels of different steel types in order to prevent the molten steel from being mixed so much when continuously casting different steel types. ), A multi-continuous method (a method in which a block called SB is not inserted between molten steels of different steel types when different steel types are continuously cast), and the like. In addition, when continuously casting the same steel type, such a continuous pattern is not employed, and therefore, “−” is written in the continuous pattern column in FIG. 3 and the like.

  Thus, the operator M can know the production unit (charge) with a high priority by looking at the production priority area A2. In FIG. 3, the production schedule is not yet determined, but the operator M can grasp the production status by looking at the production schedule area A1. In addition, the operator M can create a production schedule by moving (deploying) the production items arranged in the production priority area A2 to the production schedule area A1 by using the input device 12.

  As shown in FIG. 3, for example, the operator M casts a charge in order to cast a charge with a high production priority (a charge with short delivery time and low productivity) located at the upper left of the production priority area A2 as early as possible. The production item shown (for example, NH324BC in FIG. 3) is brought to the production schedule area A1. Specifically, using the mouse (input device 12), the part indicating the production item a (NH324BC) in the production priority area A2 is dragged, and the part of the desired date (for example, October) is produced in the production schedule area A1. It is better to drop to No. 3) on the 24th. Then, the production items brought from the production priority area A2 by the mouse 12 are deployed in the production schedule area A1, and a new production schedule is determined.

On the other hand, production items that were in the production priority area A2 (production items that have been moved from the priority display area to the production schedule) will disappear from the production priority area A2, and production items waiting for production will be included in the production schedule. become.
Since the number of charges that can be cast in one day is displayed in the production schedule area A1, there is no need to determine production scheduling for casting more than the necessary charge. In addition, the specified amount of special element (for example, C [carbon concentration], N [nitrogen concentration], etc.) is indicated for each charge, so the production schedule is finely adjusted (change of the production schedule) while referring to these values. ) Can also be performed. Further, when a certain charge is dragged and dropped from the production priority area A2 to the production schedule area A1, an estimated value of the crop amount in the continuation of the previous charge and the main charge can be displayed. The crop amount may be calculated using an empirical formula based on past production results or a database of production results.
[First Embodiment]
In the above-described basic structure production schedule determination support system 10A, when manufacturing various products, an efficient production schedule can be determined reliably and promptly regardless of the degree of experience of the operator M. It becomes possible.

However, in the basic configuration support system 10A, the following situation may occur.
That is, when the inexperienced operator M determines the production schedule, the first production item for which the production schedule should be determined is selected and selected from the plurality of production items arranged in the production priority area A2. It may be possible to move the first production item to a position in the production schedule area A1. However, after the first production item is arranged, a plurality of production items that are the next candidates for the production item (production items arranged before and after the first production item) are arranged in the production priority area A2. It is conceivable that a situation occurs in which one of the production items is wondering which one to select.

  For example, in FIG. 3, an inexperienced operator M operates the input device 12 to select one production item (for example, NH324BC) displayed in the production priority area A2, and within the production schedule area A1 ( For example, it is placed in No. 3) on October 24. The selected production item is given two priority information, delivery date and productivity, displayed in the production priority area A2.

  However, only the information in the production priority area A2 may cause the inexperienced operator M to get lost in the next production item to be placed (connected) before and after the placed production item a (NH324BC). 3, inexperienced operator M selects one of a plurality of production items in production priority area A2, and before and after the arranged production item a (NH324BC) (No. 2 and No. 4 on Oct. 24). ) Is difficult to place the next production item.

  Therefore, in the production schedule determination support system 10 of the present invention, in the above-described situation, the order of the group (steel type group) to which the production item connected before and after the production item belongs to the production item (steel type) of interest. It is displayed on the support monitor 11 to teach detailed instructions and suggestions to an inexperienced operator, that is, it is possible to support the decision making of the operator M.

Hereinafter, a first embodiment of a production schedule determination support system 10 according to the present invention will be described in detail with reference to the drawings.
As shown in FIG. 4, the production schedule determination support system 10 according to the first embodiment displays a “group index area A3” in addition to the basic configuration determination support system 10A. The group index area A3 refers to the past production results, determines the group to which the production items connected before and after the production item belong to the focused production item (steel type), and the group thus determined is the group index (steel type). Group), and the order of the extracted group indices is displayed. The order of the displayed group indices can be considered as indicating the order of casting in groups. The order of group indices is calculated by a production schedule determination model stored in a storage device in the computer 13.

In the production schedule determination model, the component index of the production item is used and the group index compiled for each production item whose component value is approximated and the past production results, that is, the past production schedule are stored in advance. Yes.
In the group index area A3, when the operator M selects the production item a (NH324BC) arranged in the production schedule area A2, the group to which the selected production item a (NH324BC) belongs and a group column including the group are displayed. When the operator M selects one of the group columns shown in the group index area A3, a plurality of production items belonging to the group column are displayed.

  That is, in the group index area A3, when the operator M arranges the production item a (NH324BC) in the production priority area A2 in the production schedule area A1, a plurality of group indexes are assigned to the production item a (NH324BC). Based on the past production schedule, there is a “pre-production item” that has been produced before the production item a (NH324BC) and / or a “post-production item” that can be produced subsequent to the production item that has been arranged. A plurality of group indexes to which it belongs are displayed.

  The operator M operates the input device 12 while referring to the list of production schedules shown in the group index area A3, so that the production items a displayed in the production priority area A2 and the group index area A3 are displayed. Another production item that is the next candidate for (NH324BC) is arranged in the production schedule area A1, and the production schedule is determined. When a mouse is used as the input device 12, it is preferable to move the pointer over the selected production item and click the right button of the mouse 12. Moreover, when using a touch panel, it is good to push on the production item to select on the screen with a fingertip.

As shown in FIG. 5, the group index area A3 displayed on the screen of the support monitor 11 is divided into two areas (A31, A32).
In the table A31 in the left area of the group index area A3, the connection pattern of the group index of the production unit having the largest production performance of continuous casting with respect to the selected production item a (NH324BC), that is, the production schedule is tabular. A plurality (all possible production schedules in FIG. 5) are displayed. The group index displayed in the table A31 is indicated by a name such as JHW group, JH group, JFS group, for example. Details of these group indicators will be described later, but the production items are summarized for each approximate value (component value) using the value of the production item (such as the component value of the steel type) for the production item of interest ( Steel group). In the present embodiment, it is assumed that the selected production item a (NH324BC) belongs to the group index of JHW.

  Specifically, the table A31 is divided into a plurality of sections, and group indexes are arranged in the sections. A plurality of sections in which the group index is arranged are connected in the left-right direction, and the plurality of connected sections are used as rows. The column in Table A31 represents the order of connection of group indices (production schedule), and the group indices before and after the selected production item a (NH324BC) can be confirmed. In addition, the entire connection of the selected production item a (NH324BC) can be confirmed.

  Further, the numerical value shown on the right side of the table A31 (substantially the center of the group index area A3) is the value of the crop amount in the pattern displayed on the left side of the table A31. “Large” is the maximum value of the crop amount, and “Small” is the minimum value of the crop amount. “Average” is an average value of the maximum value and the minimum value of the crop amount. “N” is the number of production schedules used in the past (the number of past production results). Looking at the crop amount table shown on the right side of the uppermost pattern, it can be confirmed that the uppermost pattern has a relatively small crop amount in the table A31. That is, the uppermost pattern shows that there has been a past record in which the steel type groups are connected in the order of JHW, JH, JHW, and JFS, and the crop amount was 7 tons.

  Table A31 can display a plurality of columns (production schedules based on past results). In order to display a plurality of columns, a desired number of columns (patterns) can be selected by selecting a “minimum number of patterns” check box provided in the upper right of the table A31. For example, when the “5” check box is selected, five production schedules can be displayed. If the “Display all” check box is selected, all production schedules can be displayed. The pattern indicates a flow of continuous casting for one day (how production items are connected).

Here, the group index displayed in the table A31 will be described.
The group index is obtained by grouping production items for each value approximated by a cluster analysis method (for example, hierarchical clustering) using production item values (such as component values of steel types). For example, a hierarchical clustering method is used to group production items.

  In the hierarchical clustering method, first, one production item and another production item are selected from among a plurality of production items, and the difference between the component value of one production item and the component value of another production item is calculated. . The calculated numerical value (component difference of production items) is used as distance data. In the data of this distance, when the numerical value is small (distance is short), the component difference of the production item is small, whereas when the numerical value is large (distance is long), the component difference of the production item is large. That is, if the numerical value of the distance data is small, it can be understood that one production item and another production item are similar production items or similar production items. Two production items with small component differences are grouped together. By repeating such a method, a plurality of production items are grouped.

  Next, a group of two production items is assumed to be one production item Z. The component value of the production item Z is calculated. The component value of the production item Z is an intermediate value (average value) of the component values of the two production items to which it belongs. In this way, a group of two production items is regarded as one production item Z, and grouping is repeated until the grouped production items exceed a preset value.

By grouping a plurality of production items in this way, it is possible to combine only similar (approximate) production items and the same type of production items from among a large number of production items.
Now, on the actual screen of the support monitor 11, the group index displayed in the group index area A3 is colored on the display portion so that the operator M can easily see it. The coloring of the group index expresses whether or not the selected production item a (NH324BC) is included.

  For example, the group index to which the selected production item a (NH324BC) belongs (in FIG. 5, a group having an initial letter J such as JHW, JH, JFS) is shown in red, for example. Further, the group index (in FIG. 5, LFL, LM, LCM) that does not include the selected production item a (NH324BC) but includes the production item (production item that has been ordered) shown in the production priority area A2. , LCV, and the like), for example, are shown in black. In addition, the selected production item a (NH324BC) and the production item indicated in the production priority area A2 are not included (production items not ordered) group index (in FIG. 5, KKM, KG, KOR, KUV, etc.) The group whose initial is K is shown in green, for example. The group index shown in green is that the production schedule can be realized even if the group index is excluded.

The group index is not limited to those expressed by colors, and any group index may be used as long as the level of production priority can be visually recognized. For example, the group index can be expressed by changing the size, type, and font of display characters. May be.
Now, in FIG. 5, the group index shown in the uppermost column suggests that the production schedule can be determined with reference to only the group index to which the selected production item a (NH324BC) belongs. In this column, the production schedule can be determined only by the group index to which the selected production item a (NH324BC) belongs (for example, the production schedule is determined only by the production item belonging to JHW), or in the top column. It is possible to select a production item from all the displayed group indices and determine a production schedule.

The group index indicated by the second column from the top includes the group index to which the selected production item a (NH324BC) belongs and the production priority area A2 that does not include the selected production item a (NH324BC). This indicates that the production schedule can be determined with reference to the group index including the production items that have been set.
Further, the group index shown in the 3rd to 11th columns from the top includes the group index to which the selected production item a (NH324BC) belongs and the selected production item a (NH324BC), but the production priority area A2 It is shown that the production schedule can be determined with reference to the group index including the production item shown in FIG. 5 and the group index including the production item not shown in the production priority area A2.

In addition, for the group indicators shown in the 11th and subsequent columns from the top, at least one group indicator is omitted from the group indicators displayed in the column, and the production schedule is referred to by referring to the group indicators remaining after the exclusion. It shows that it can be determined.
When one group index (for example, the fourth JFS group from the top left side) connected before and after the group index (JHW) to which the production item a (NH324BC) belongs is selected from the table A31, the group index area The table A32 is displayed on the right side of A3.

  As shown in FIG. 5, the table A32 displays all post-production items in the group index (JFS). In the table A32, the production item a (NH324BC) is displayed at the top, and a plurality of post-production items that can be connected after the production item a (NH324BC) are displayed in the lower part of the table A32. In Table A32, candidates for previous production items connected before production item a (NH324BC) may be shown as a table. Further, all candidates for the pre-production item and the post-production item connected before and after the production item a (NH324BC) may be shown as a table.

A “Search” button is arranged at the bottom of the table A32. This “search” button searches the production priority area A2 for the post-production item displayed in the table A32 and displays the post-search production item in the production priority area A2. The retrieved display information of the production item teaches detailed instructions and suggestions to the operator M.
In summary, the production schedule determination support system 10 of the present invention includes not only the production items connected before and after the production item but also the production items connected before and after the production item for the focused production item. The order of group indicators is displayed.

That is, the group index area A3 displayed on the support system 10 shows a production schedule (connection pattern) that is relatively similar to the production schedule created in the past, although the daily production schedule is different. The shallow operator M can easily determine the production schedule.
The production schedule determination support system 10 according to the first embodiment described above, particularly the procedure for determining the production schedule using the group index area A3 will be described.

As shown in FIG. 4, the operator M uses the input device 12 (mouse) to cast a charge with a high production priority (a charge with a short delivery date and low productivity) as soon as possible. The production item a (NH324BC) is selected from the production priority area A2 displayed on the screen, and is arranged in the production schedule area A1.
Specifically, using the input device 12 (mouse), the display part of the production item a (NH324BC) in the production priority area A2 is dragged, and the part of the desired date (for example, October) is produced in the production schedule area A1. Drop to No. 3) on the 24th. Then, the production item a (NH324BC) brought from the production priority area A2 by the mouse 12 is arranged in the production schedule area A1. On the other hand, the production item a (NH324BC) in the production priority area A2 disappears from the production priority area A2, and the production item a (NH324BC) waiting for production is included in the production schedule.

  However, it is assumed that the operator M is inexperienced and is troubled about the arrangement of the production item connected next to the selected production item a (NH324BC). In that case, the display part of the arranged production item a (NH324BC) is right-clicked with the mouse. Then, the group index area A3 relating to the production item a (NH324BC) is displayed on the screen of the support monitor 11, and at the same time, the group index (JHW, JH, JFS) to which the production item a (NH324BC) in Table 31 belongs is flashing. To do. The operator M can easily confirm the group index to which the production item a (NH324BC) belongs.

  Then, the operator M looks at the column of the table A31 in the left area in the displayed group index area A3. In the column of Table A31, for the production item a (NH324BC), a plurality of orders (production schedules) of group indexes to which the production items connected before and after the production item a (NH324BC) belong are displayed. A column desired by the operator M, that is, an efficient production schedule is selected from the columns. For example, it is assumed that the operator M has selected the uppermost column. Further, it is assumed that the production item a (NH324BC) belongs to the third JHW group from the left side of the uppermost column. Further, when looking at the crop amount table shown on the right side of the uppermost pattern, it can be confirmed that the uppermost pattern has a relatively small crop amount in the table A31.

Then, the operator M selects a JFS group adjacent to the right of the JHW group, and left-clicks the display portion of the JFS group. Then, the table A32 is displayed on the right side of the table A31.
In the table A32, a plurality of post-production items that can be connected after the arranged production item a (NH324BC) are displayed. Note that the production item a (NH324BC) is displayed at the top of the table A32, and a plurality of candidates for subsequent production items are displayed below the production item a (NH324BC).

The operator M left-clicks the display part of the post-production item b (JL211GR) from the table A32 and selects it. At this time, the display portion of the post-production item b (JL211GR) may be changed in coloring so as to indicate that it has been selected.
Then, the operator M uses the mouse 12 to left-click the “search” button arranged at the bottom of the table A32. Then, the computer 13 detects the post-production item b (JL211GR) from within the production priority area A2. At this time, the detected post-production item b (JL211GR) blinks in order to suggest the movement destination to the operator M.

As shown in FIG. 6, the operator M refers to the group index area A3, and uses the mouse 12 to drag the selected production item b (JL211GR) and after the production item a (NH324BC) (10 Drop it to No. 4) on the 24th of the month to create a production schedule that connects to the production item a.
In Table 32, other post-production items are displayed in addition to the post-production item b (JL211GR). One of these other post-production items may be connected after the production item a (NH324BC). For example, instead of the post-production item b (JL211GR), the post-production item c (EG522AL) can be included in the production schedule after the production item a (NH324BC).

By the above procedure, the operator M drags the post-production item b (JL211GR) detected in the production priority area A2 while referring to the group index area A3, and after the production item a (NH324BC) arranged before. A production schedule that drops and leads to the production item a arranged in front can be very easily assembled.
[Second Embodiment]
Hereinafter, a second embodiment of the production schedule determination support system 10 according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 7, the configuration of the production schedule decision support system 10 according to the second embodiment is substantially the same as the decision support system 10 (see FIG. 4) of the first embodiment. That is, the production schedule determination support system 10 of the second embodiment is the same in that “group index area A3” is displayed in addition to the basic configuration determination support system 10A.

However, in the second embodiment, the content displayed in the group index area A3, that is, the production schedule determination method is different.
The group index area A3 of the second embodiment is selected when the operator M selects at least two or more production items from among a plurality of production items (steel types) arranged in the production schedule area A1. A group (group index) to which a plurality of production items (production item d (NH324BC), production item e (CX632QA), production item f (NH068NX), and production item g (EG522AL)) belongs is determined and determined. The group index is displayed as a group column (past connection pattern column) connected to each group index based on the past connection record, and when the operator M selects any group index in the group column, the group index is displayed. Production items belonging to the index are displayed in the order in which they were connected in the past, and production items belonging to other group indexes are also displayed. It is displayed in the connection the order in which they were in the past like.

  Then, the operator M operates the input device 12 while referring to the order of the production items shown in the group index area A3, so that the production item d displayed in the production priority area A2 and the group index area A3. Another post-production item (for example, production item h (JL211GR)), which is the next candidate for (NH324BC), is arranged in the production schedule area A1, and the production schedule is determined.

Hereinafter, the contents displayed in the group index area A3 of the second embodiment will be described in detail with reference to the drawings.
As shown in FIG. 8, the group index area A3 of the second embodiment is divided into two regions (A33, A34), as in the first embodiment.
The table A33 in the left region in the group index area A3 of the second embodiment is the same as the table A31 of the first embodiment, and the selected production item d (NH324BC), production item e (CX632QA), production item f The connection pattern of the group index (for example, JHW group, JH group,...) Of the production unit having the largest production performance of continuous casting with respect to (NH068NX) and the production item g (EG522AL) is displayed. In the second embodiment, it is assumed that the selected production item d (NH324BC) belongs to the group index of JHW. The production item e (CX632QA) belongs to the JH group index, the production item f (NH068NX) belongs to the JLH group index, and the production item g (EG522AL) belongs to the JFS group index. Shall.

The table A33 is divided into a plurality of sections, and group indexes are arranged in the sections. A plurality of sections in which the group index is arranged are connected in the left-right direction. A plurality of sections connected to each other is a group column indicating the order of connection of group indices (the past production schedule).
On the other hand, the table A34 in the right area in the group index area A3 of the second embodiment is one group column (for example, the highest JHW group / JH group / JHW group) among the group columns displayed in the table A33. When JFS group) is selected, the order of connection based on past results of production items belonging to the selected group column is displayed. As shown in FIG. 8, each group in the order of connection based on past results, such as JHW group production items (NH324BC, JL211GR...) And then JH group production items (CX632QA, JL253RS...). The production items belonging to the column are displayed as a list.

Now, on the actual screen of the support monitor 11, the group index displayed in the group index area A3 is changed in character font (bold, fine, italic, font change, etc.) so that the operator M can easily see it. Yes. This change in the font of the group index expresses whether or not the selected production item (for example, production item d (NH324BC)) is included.
As shown in FIG. 8, the group index (JHW, JHW, Production Item d (NH324BC), Production Item e (CX632QA), Production Item f (NH068NX), Production Item g (EG522AL)) to which the selected plurality of production items belong. For example, a group in which the initial letter is J, such as JH, JLH, and JFS) is indicated by a bold character. In addition, a group index (ie, a production item that has been ordered) that does not include the selected plurality of production items (production item d to production item g), but includes the production item indicated in the production priority area A2 (that is, the production item that has been ordered). In FIG. 8, a group such as LFL, LM, LCV, and LCM whose initial letter is L) is indicated by, for example, fine characters.

  Further, a group index including a plurality of selected production items (production item d to production item g) and production items other than the production items indicated in the production priority area A2 (that is, production items that have not been ordered). (In FIG. 8, the group whose initial letter is K, such as KKM, KFS, KM, KA) is indicated by italic letters, for example. With this group index, basically, the production schedule can be realized even if the group index is excluded.

  In summary, regarding the display of the group index displayed in the group index area A3, what is indicated in bold is a group index displayed in the production schedule area A1 and to which the selected production item belongs. In addition, what is indicated in fine characters is a group index to which the selected production item does not belong, but to which the production item displayed in the production priority area A2 belongs. In addition, the italicized characters are group indices to which production items not displayed in the production schedule area A1 or the production priority area A2 belong, and the production schedule is realized even if the group indices are excluded. Is something that can be done.

Next, the background of the group column (group index) displayed in the group index area A3 will be described. The group columns in the group index area A3 of this embodiment have different display forms under predetermined conditions.
As shown in FIG. 8, the top column (JHW group / JH group / JLH group / JFS group) of the group row to which the selected plurality of production items (production item d to production item f) belong is the selected production item. It is a group column that can determine the production schedule only. The background of this group row is shown in dark gray, for example.

  In addition, among the group columns to which the selected plurality of production items (production item d to production item g) belong, the group columns indicated by a slightly light gray background (group columns of columns from the second row to the seventh row from the top) ) Is a group column in which a production schedule can be determined by adding a production item (production item for which an order has been received) shown in the production priority area A2 to the selected production item.

  In addition, among the group columns to which the selected plurality of production items (production item d to production item g) belong, the group columns (columns from the top 8 to the 16th row from the top) indicated by white background (white) Group column) adds production items (production items that have not been ordered) other than the production items described above to the selected production item and the production item (production item that has been ordered) in the production priority area A2. This is a group column that can determine the production schedule.

In determining the production schedule using the group column shown in white on the background of Table 33, the group index to which the production items not ordered are included in the group column shown in white on Table 33 is shown. Even if (except for KKM, KFS, KM, KA, etc., the initial letter is K), it is determined whether or not production items can be connected.
For example, looking at the top ten group column displayed in the group index area A3 in FIG. 8, "... JHW, KFS, LM ..." is displayed. Also, looking at the group column in the fourth row from the top, it is “... JHW, LM”. Except for the KFS group of the group index of the 10th group column, the order is the same as the group column of the fourth row from the top, and it can be seen that the order has a past record. Therefore, the group column in the 10th row confirms that the production items belonging to the JHW group and LM group of the group index can be connected even if the KFS group of the group index is excluded, based on the past results. A production schedule can be determined using the eye group sequence.

  On the other hand, for example, in the group column whose background in Table 33 is outlined, even if the group index to which the production item that has not received an order belongs is excluded, the order is not in the past record, and the KFS group of the group index Therefore, the production schedule cannot be determined using the group column. A group column that cannot be adopted for determining a production schedule is not displayed in advance.

  In addition, among the group columns to which the plurality of selected production items (production item d to production item g) belong, the group column with a light gray background (the group column of the 17th and subsequent columns from the top) is selected. This is a group column in which a production schedule can be determined by removing at least one group index from among group indices to which a production item belongs. That is, this group sequence cannot be used when determining the production schedule in this embodiment.

  In summary, regarding the background of the display of the group index displayed in the group index area A3, the group column displayed with a dark gray background is only the group index to which the production item displayed in the production schedule area A1 belongs. Is something that can be determined. The group column displayed with a slightly light gray background includes a group index to which the production item displayed in the production schedule area A1 belongs and a group index to which the production item displayed in the production priority area A2 belongs. The production schedule can be determined.

  In addition, the group column displayed with a white background has a group index to which the production item displayed in the production schedule area A1 belongs and a group index to which the production item displayed in the production priority area A2 belongs. It is possible to determine a production schedule by adding a group index to which an unplanned production item belongs. In addition, regarding the group column displayed with a white background, it is possible to exclude a group index to which a production item not scheduled to be produced belongs, and to determine a production schedule on that basis.

In the group column displayed with a light gray background, the production schedule cannot be determined unless at least one group index is excluded from the group indices to which the production items displayed in the production schedule area A1 belong. Is.
The group index and the background of Table 33 are not limited to those expressed in gray, but may be anything as long as the degree of production priority can be visually recognized. For example, in the case of a display character, it may be expressed by changing the character size, type, font, or the character color. In the case of the background in Table 33, it may be expressed in various colors such as blue and yellow.

In summary, the production schedule determination support system 10 of the second embodiment displays the group index to which the production items belong for a plurality of production items of interest, and separate production connected before and after those production items. Items are displayed in the order they are connected.
That is, in the group index area A3 displayed on the support system 10 of the second embodiment, a production schedule (connection pattern) that is relatively similar to a production schedule created in the past is displayed, and an inexperienced operator M can easily determine the production schedule without worrying.

In addition, since the other structure in 2nd Embodiment is substantially the same as 1st Embodiment, the description is abbreviate | omitted.
The production schedule determination support system 10 according to the second embodiment described above, particularly the procedure for determining the production schedule using the group index area A3 will be described.
As shown in FIG. 7, the operator M has a plurality of production items (production item d (NH324BC), production item e (CX632QA), production item f (NH068NX), and production items arranged in the production schedule area A1. g (EG522AL)). Here, the operator M right-clicks the display part of any production item (production item d to production item g) with the mouse. For example, the display part of the production item d (NH324BC) is right-clicked with the mouse. Then, the group index area A3 relating to the production item d to the production item g is displayed on the screen of the support monitor 11, and at the same time, a plurality of group columns of group indexes to which the production item d to the production item g belong are displayed. By displaying the group index and the group string in this way, the operator M can easily confirm the group index to which the production item d to the production item g belong.

Then, the operator M looks at the column of the table A33 in the left area in the displayed group index area A3. In the column of the table A33, for the production item d to the production item g, a plurality of group index orders (group columns) to which the production items connected before and after the production item d to the production item g belong are displayed. .
A column desired by the operator M, that is, an efficient production schedule is selected from the columns. For example, it is assumed that the operator M selects (JHW, JH, JLH, JFS) the group row displayed with a dark gray background, that is, the uppermost column. Further, it is assumed that the production item d (NH324BC) belongs to the JHW group at the left end (the top of the group row) of the uppermost column. Further, when looking at the crop amount table shown on the right side of the uppermost pattern, it can be confirmed that the uppermost pattern has a relatively small crop amount in the table A31.

Then, the operator M left-clicks the display part of the JHW group. Then, the table A34 is displayed on the right side of the table A33 (see FIG. 8).
The table A34 displays a plurality of candidates for subsequent production items that can be connected after the production item d (NH324BC), and also displays a plurality of candidates for subsequent production items that can be connected after the JH group. The operator M left-clicks the display portion of the post-production item h (JL211GR) from the table A34 and selects it. At this time, the display portion of the post-production item h (JL211GR) may be changed in coloring so as to indicate that it has been selected.

  As shown in FIG. 9, the operator M uses the mouse 12 to left-click the “Search” button arranged at the bottom of Table A34. Then, the computer 13 detects the post-production item h (JL211GR) from within the production priority area A2. At this time, the detected post-production item h (JL211GR) blinks in order to suggest the destination to the operator M.

Then, while referring to the group index area A3, the operator M uses the mouse 12 to drag the selected production item h (JL211GR), and after the production item d (NH324BC) (No on October 24). 4) Drop the item into 4) to create a production schedule that leads to the production item d.
In addition to the post-production item h (JL211GR), a plurality of other post-production items are displayed in Table 34, and one of these separate post-production items is connected after the production item d (NH324BC). May be. For example, instead of the post-production item h (JL211GR), the post-production item i (JL787RL) can be included in the production schedule after the production item d (NH324BC).

By the above procedure, the operator M drags the production item h (JL211GR) detected in the production priority area A2 while referring to the group index area A3, and after the production item d (NH324BC) arranged. A production schedule that drops and leads to the production item d can be assembled very easily.
Note that, in the column of the table A33 in the left region in the displayed group index area A3, the operator M not only displays the group column displayed with a dark gray background but also the group column displayed with a slightly light gray background, It is also possible to select one of the group columns displayed with a white background.

In that case, the operator M considers the delivery date of the production items arranged in the production schedule area A1 and the delivery date of the production items arranged in the production priority area A2, and is optimal in determining the production schedule. A correct group column is selected from the group index area A3.
For example, when an efficient production schedule can be established by adding the group index to which the production item arranged in the production priority area A2 belongs to the group index to which the production item arranged in the production schedule area A1 belongs, M selects a group row displayed with a slightly light gray background from within the group index area A3.

  In the case where an efficient production schedule can be established by adding a group index to which a production item not scheduled for production belongs to a group index to which a production item arranged in the production schedule area A1 belongs, the operator M performs production without a production schedule. After confirming that the group index to which the item belongs can be removed, a group column displayed with a white background is selected from within the group index area A3.

The operator M can also refer to the group column displayed with a light gray background when determining the production schedule.
According to the production schedule determination support system 10 of the present invention described above, even a skilled operator M takes a great amount of time such as several hours when manufacturing various products (metal material products, etc.) in an ironworks. By using the support system 10 of the present invention, the production schedule creation work can be efficiently organized without depending on the experience of the operator M.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. In particular, in the embodiment disclosed this time, matters that are not explicitly disclosed, for example, operating conditions and operating conditions, various parameters, dimensions, weights, volumes, and the like of a component deviate from a range that a person skilled in the art normally performs. Instead, values that can be easily assumed by those skilled in the art are employed.

  For example, as an embodiment, the production schedule in a continuous casting machine has been illustrated and described, but a predetermined processing target is extracted from a plurality of processing targets (processed rolling material) such as a continuous heat treatment furnace, The present invention is suitable for production scheduling in a process in which processing is performed sequentially.

DESCRIPTION OF SYMBOLS 1 Continuous casting apparatus 2 Mold 3 Slab 4 Support roll 5 Tundish 6 Immersion nozzle 10 Production schedule decision support system 10A Basic configuration decision support system 11 Support monitor (display)
12 Input device 13 Computer A1 Production schedule area A2 Production priority area A3 Group index area A31 Group index pattern table A32 in descending order of production performance in the first embodiment A32 Included in the selected group index in the first embodiment Production Item Table A33 Group Index Pattern Table in Order of Most Production Results in the Second Embodiment
A34 Production item table included in the selected group index in the second embodiment M Operator

Claims (6)

A production support system for determining production schedules used in the process of manufacturing products by continuously processing production units,
The support system includes a display that can be confirmed by an operator and an input device that can be operated by the operator,
The display displays a “production schedule area” in which production items indicating the contents of production units are arranged in the order of processing,
When an operator selects a production item arranged in the production schedule area, a group index to which the selected production item belongs and a group column including the group index are displayed in the “group index area”,
When the operator selects one of the group columns shown in the group index area, the production items belonging to the group column are displayed in the “group index area”,
A production schedule determination support system, wherein the production items displayed in the group index area are arranged in a production schedule area to perform a production schedule determination operation.   2. The production schedule determination support system according to claim 1, wherein a “production priority area” for displaying the production item according to the priority of the production unit is displayed on the display unit.   3. The production schedule determination support system according to claim 2, wherein the group index and the production items belonging to the group index are obtained from production results.   The production schedule determination according to any one of claims 1 to 3, wherein the group index and a production item belonging to the group index are selected by applying a cluster analysis method to the production performance. Support system. In the group index area,
A group index to which the production items arranged in the production schedule area belong;
A group index to which the production items arranged in the production priority area belong;
A group index to which a production item different from the production items displayed in the production schedule area and the production priority area belongs is displayed,
The production schedule determination support system according to any one of claims 1 to 4, wherein at least one of the displayed group indices is displayed differently. In the group index area,
A group column composed only of group indexes to which the production items arranged in the production schedule area belong;
A group column composed of a group index to which the production item arranged in the production schedule area belongs, and a group index to which the production item arranged in the production priority area belongs,
A group index to which a production item arranged in the production schedule area belongs, a group index to which a production item arranged in the production priority area belongs, and a production item displayed in the production schedule area and the production priority area; Displays a group column composed of group indicators to which different production items belong,
6. The production schedule determination support system according to claim 1, wherein at least one of the displayed group indices is displayed in a different manner.