JP2006293549A - Production shipping plan preparation system for steel product and its production shipping plan preparation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a production shipping plan preparation system and method for consistently managing procedures from the production to shipping of products in a steel industry. <P>SOLUTION: This production shipping plan preparation system and method for shipping products manufactured by a steel manufacturing facility having one or more manufacture lines according to models by a vessel for export is provided with a shipping plan preparation means for preparing the shipping plan of products by the vessel satisfying the term of delivery of products based on the order of the products, a production plan preparation means having an upward plan preparation part for preparing a rough production plan from the plan, a rearranging part for rearranging the production plans of a steel manufacturing device among rough production plans for concentrating the same steel type and a downward plan preparation part for preparing a detailed production plan from this plan and an arithmetic means for calculating the difference of the total of sales prices to be calculated from the shipping quantity of the products and the total of the variable costs of the processing quantity of products required until the products are shipped, and for deciding the vessel for shipping the products by the detailed production plan whose difference is the maximum. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a production / shipment plan creation system for steel products and a production / shipment plan creation method for shipping products from a steelworks having a plurality of production processes, mainly using a medium-sized or large-sized ship for export.

Conventionally, when manufacturing steel products, the restrictions on production lots in the steelmaking and casting processes, which are the upper processes, are very strict, and in order to produce competitive products, a high yield in the production lot organization in the upper processes is required. Planning was essential. Also, from the operational aspect, it is important to maximize the operating rate of the owned equipment. For this purpose, for example, a hot rolling (hot rolling) process, a cold rolling (cold rolling) process, and plating ( It was necessary to accurately predict the supply and demand balance of the lower process having the (continuous galvanizing) process and to formulate a production plan. Furthermore, in order to fulfill delivery date promises to customers, it was necessary to create a production plan that takes into account the supply and demand balance of the lower process.
Regarding production planning, for example, contents centering on parts supply control (ie, inventory management) in the assembly industry such as automobiles are disclosed, but in this production plan, materials that mainly handle self-produced raw materials are disclosed. It was not compatible with industry. As a peculiarity of this material industry, for example, in the steel industry, the production efficiency factors of each manufacturing process (for example, steelmaking converters are component units, hot rolling is the heating temperature) are different. If the ability is oriented, there is a risk of having a contradictory element.

Therefore, as a production plan to be applied to the material industry, for example, in Patent Document 1, a production lot organization is performed in consideration of the restrictions of steelmaking and hot rolling processes for an order group for one week. An interactive scheduling system linked to a production plan is disclosed.
Further, in Patent Document 2, a rough production plan for the production lot of the upper process is created by processing the order group of the production plan created in the ascending (backward) plan creation processing process based on the first assortment constraint. The upper process rough plan processing process and the production start order group created in this upper process rough plan processing process is processed based on the second assembling constraints, and the upper process manufacturing lot A method for creating a production plan for an intermediate steel product having an upper process refined plan processing step for creating a refined production plan is disclosed.
In Patent Document 3, the target material sources are extracted from the order information, the order input information, and the delivery date information, and the information is aggregated for every port or riverbank. A method of providing is disclosed.
By the above method, it becomes difficult to delay the delivery date, and it is possible to operate the facility while suppressing the inventory of intermediate products.

JP-A-10-268908 JP 2003-256020 A JP 2002-91536 A

However, the conventional production planning has still had the following problems to be solved.
The method of Patent Document 1 is intended only for a selected order group, but the actual order group exists for one to two months, and a manufacturing plan is formulated based on a sales plan. Since a group of orders close to the weekly unit is selected and linked to manufacturing, there remains room for improvement in terms of application range and processing content. Also, if all of the customer orders are large, problems are unlikely to occur. However, in order to connect small orders to manufacturing, detailed judgment is required in consideration of both yield and delivery date. For this reason, there is a problem that it is not suitable for selection of an order group on a weekly basis.
In Patent Document 2, the restriction condition for creating the uplink plan is fixed to one type, and the accuracy of the created uplink plan cannot be sufficiently increased. Not reached.
Also in patent document 3, the constraint condition at the time of creating a plan is being fixed to one kind, and has not reached high profit.
In addition, for products exported on medium or large ships, the minimum load capacity to be loaded on the ship is set, and in order to guarantee that, the stagnant money for the completion of product assortment (manufacture and delivery completion) The time was long.

The present invention has been made in view of such circumstances, and by automatically calculating a linked plan from production recording to shipment, production and shipment of steel products that can be managed consistently from production to shipment in the steel industry. It is an object to provide a plan creation system and a production / shipment plan creation method thereof.

The steel product production and shipping plan creation system according to the first invention in accordance with the above object is a steel production facility having one or more production lines provided with an iron source production device and one or more other production devices according to the product type. A production / shipment plan creation system for shipping products manufactured in a medium-sized or large-sized ship for export,
A shipping plan creation means for creating a shipping plan for the product by the ship to satisfy the delivery date of the product based on the order of the product;
Based on the shipping plan, an upstream plan creation unit that creates a rough production plan by going back to the iron source manufacturing apparatus in order from the final process of the production line for each type of product to be shipped, and the types are consolidated into an iron source of the same steel type Therefore, the reorganization unit that rearranges the production plans of the iron source production apparatus in the rough production plan created by the upstream plan creation unit, and the iron source production based on the rearranged production plans Production plan creation means comprising a down plan creation unit for creating a precision production plan that goes down from the device to the final process of the production line;
Based on the production plan created by the production plan creation means, the total of the sales price calculated from the shipment amount of the product within a predetermined setting period and the product can be shipped. A calculating means for calculating a difference of the total variable costs of the processing amount of the product within the set period, selecting a refined production plan having the largest difference, and determining the ship for shipping the product; Have

In the production and shipping plan creation system for steel products according to the first aspect of the invention, a ship storage unit for storing data of the destination of the ship to be used and the load amount for each of the types,
An order storage unit for storing the order quantity and delivery date data for each product type and destination of the product;
A facility capacity storage unit for storing data of the production amount per unit time for each product type in each of the manufacturing apparatuses;
A facility operation storage unit for storing constraint conditions and operation shift data at the time of switching between the types in each manufacturing apparatus;
A facility repair storage unit for storing data of repair and construction period and start date of each manufacturing apparatus,
A passing process storage unit that stores data of a necessary passing process of the production line for each of the types;
A selling price storage unit for storing selling price data for each product type;
A variable cost storage unit for storing variable cost data for each passing step of the production line and the product type;
The ship that uses the order of the product that can be manufactured within a predetermined period based on the data of the ship storage unit and the order storage unit by the shipment plan creation means for shipping the product. For each type of ship, so that the minimum loading capacity for each type of ship is satisfied for all loading types,
Create the rough production plan based on the shipment plan by using the data of the equipment capacity storage unit, the equipment operation storage unit, the equipment repair storage unit, and the passing process storage unit by the upstream plan creation unit. And
By the reorganization unit, rearrangement of the production plan of the iron source production apparatus is performed within a predetermined recombination possible period,
The calculation means sums up the orders of the products of the selected production plan for each of the vessels used for shipping the products, and sets the minimum loading amount for each type of the vessel to all loading types. It is preferable to select and determine the ship to be satisfied.

In the production and shipping plan creation system for steel products according to the first invention, the facility capacity storage unit stores data of a plurality of facility capacity patterns, and the facility operation storage unit stores data of a plurality of facility operation patterns, The facility repair storage unit stores data of a plurality of facility repair patterns, and the uplink plan creation unit and the downlink plan creation unit include data of the plurality of facility capacity patterns, data of the plurality of facility operation patterns, It is preferable that one piece of data is selected and used from each of the plurality of equipment repair pattern data.

In the production and shipping plan creation system for steel products according to the first invention, the production plan creation means uses the data of the plurality of equipment capacity patterns, the plurality of equipment operation patterns, and the plurality of equipment repair patterns. A plurality of the above-mentioned production plans,
The calculation means calculates the total sales price based on the data stored in the sales price storage unit from the shipment amount of the product within the set period until the product can be shipped. Calculated based on the data of the variable cost storage unit from the processing amount of each process of the production line within the set period passed through, the difference between the total of the selling price and the total of the variable cost is maximized It is preferable to select the precision production plan that uses the equipment capacity pattern, the equipment operation pattern, and the equipment repair pattern.

In the production and shipping plan creation system for steel products according to the first invention, the iron source manufacturing apparatus is a converter and a manufacturing apparatus incidental thereto, and the one or more other manufacturing apparatuses are downstream of the iron source manufacturing apparatus. It is preferable that it is a manufacturing apparatus of the product arranged on the side.

The production and shipping plan creation method for steel products according to the second invention that meets the above-described object uses the production and shipment plan creation system for steel products according to the first invention, from production of the product to shipment by the ship. Create a plan.

The production / shipment plan creation system for steel products according to claim 1 and the production / shipment plan creation method for steel products according to claim 6 comprise a shipment plan creation means, a production plan creation means, and a calculation means. Therefore, it is possible to automatically calculate a linked plan from production recording to shipping, and to manage integrated production from product production to shipping. Therefore, as before, after production is completed, it is possible to issue a port entry instruction based on this plan without issuing a ship entry instruction, and it is possible to minimize the product stagnation time in the warehouse. Can make a good plan. In addition, the accuracy of the produced production plan can be sufficiently increased, and as a result, it is possible to obtain higher profit than before.

In particular, the production and shipping plan creation system for steel products according to claim 2 sets in detail each condition required for the production of the product, so that the accuracy of the produced production and shipping plan can be further increased.
In addition, the production / shipment plan creation system for steel products according to claim 3 is created because data for a plurality of equipment capacity patterns, data for a plurality of equipment operation patterns, and data for a plurality of equipment repair patterns can be used. The accuracy of production shipment planning can be further increased.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a flowchart of a production shipment plan creation method using a production shipment plan creation system for steel products according to an embodiment of the present invention, and FIG. 2 is a provisional rough production plan created by the production shipment plan creation system. FIG. 3 is an explanatory diagram of a rough production plan created by the production shipment plan creation system, FIG. 4 is an explanatory diagram of a rearranged refined production plan created by the production shipment plan creation system, and FIG. It is explanatory drawing of the arrangement configuration of the computer to which the production shipment plan preparation system is applied.

A steel product production and shipping plan creation system (hereinafter also simply referred to as a plan creation system) according to an embodiment of the present invention is disposed on the downstream side of an iron source production apparatus having a converter and the iron source production apparatus. A production and shipping plan creation system for shipping products manufactured at steel manufacturing facilities that have one or more production lines equipped with other production equipment, depending on the type, on medium or large ships for export Therefore, a linked plan from production recording to shipping is automatically calculated, and integrated production management from product production to shipping is performed. This will be described in detail below.

As shown in FIG. 5, the steel product production / shipment plan creation system includes data storage means, shipment plan creation means, production plan creation means, and calculation means, and can input and delete data. It is constructed in the computer 11 capable of transmitting and receiving data. Each process of the data storage means, the shipping plan creation means, the production plan creation means, and the calculation means is executed by a program stored in a storage device in the computer 11. Here, each means is not configured to be a single computer 11, and can transmit / receive data to / from the host computer 10, and can also transmit / receive data to / from each other. It is also possible to construct. At this time, the processing of each means constructed in each of the computers 12 to 14 is executed by a program stored in a storage device in each computer.
The data storage means includes a ship storage unit, an order storage unit, an equipment capacity storage unit, an equipment operation storage unit, an equipment repair storage unit, a passage process storage unit, a sales price storage unit, and a variable cost storage unit, and produces a production plan. The means includes an ascending (backward) plan creating unit, a reorganization unit, and a descending plan creating unit.

The ship storage unit of the data storage means stores data of the minimum and maximum loading capacity for each ship destination and type. Table 1 shows an example of a data group input to the ship storage unit.

Here, the target ships are less likely to enter the port than domestic ships (for example, about 3 to 5 times a month), and are medium- or large-sized ships that carry and transport multiple types of products. It is. The medium-sized ship is a ship having a maximum load capacity of, for example, about 2,000 to 3,000 tons, and the large ship is a ship having a maximum load capacity of, for example, about 10,000 tons.
The product type means the type or classification of the final product. In addition to the hot rolled (hot rolled) coil and the cold rolled (cold rolled) coil, for example, a thin plate, an electromagnetic steel plate, a stainless steel plate, a thick plate, and a steel bar. Or there is a shape steel.
Since the data input to the ship storage unit is stored in a database, it can be output in a form different from Table 1.

The order storage unit stores order quantity and delivery date data for each order type (type) and destination. An example of the data group stored in the order storage unit is shown in Table 2.

Here, the production line includes an iron source production apparatus having a converter disposed in an iron source process (also referred to as a steelmaking process), a secondary refining and continuous casting apparatus attached thereto, and a downstream of the iron source process. For example, it is comprised by the manufacturing apparatus of the product which performs any 1 or 2 or more of hot rolling, cold rolling, annealing, and surface treatment (galvanization etc.) arrange | positioned at the side. .
Since the data input to the order storage unit is also stored in a database, it can of course be output in a form different from Table 2.

The equipment capacity storage unit stores data on production volume per unit time (ton / hour) for each product type in each manufacturing device, and the equipment operation storage unit stores constraints and operation shifts when switching between product types in each manufacturing device. Is stored. Here, the constraint condition means, for example, the stop of the production line or the change of the steel plate pass line in accordance with the change of the product type in the production line (for example, hot dip galvanizing line) for plating on the surface. Moreover, even if the production line is not stopped, for example, in the cold rolling process, schedule constraints for sequentially passing the steel sheet from a wide width to a narrow width (when rolling with the same roll) are performed. There is also.
The operation shift is determined based on the operation status of each manufacturing apparatus, that is, the working mode (for example, 2 shifts or 3 shifts) of the worker to be operated.
In addition, when the same manufacturing apparatus is installed in multiple numbers, for example, when the cold rolling apparatuses A to C (plurality) are installed, data of a plurality of equipment capacity patterns that can be adopted, and a plurality of equipment operation patterns The data of (1) A to C can be used, (2) Only A can be used, (3) Only B can be used. It is preferable to store it in the section.

The equipment repair storage unit stores data of repair and construction period and start date of each manufacturing apparatus. Here, if it explains taking the repair plan of the cold rolling apparatus of A to C as an example, the possible suspension period (start date / time and end date / time) and construction period time can be set for each cold rolling apparatus.
Thus, when the cold rolling apparatuses A to C are installed, the order of a plurality of constructions that can be adopted, that is, (1) A → B → C, (2) B → A → C, (3) C It is preferable to store the equipment repair pattern data such as → B → A in the equipment repair storage unit.
The passage process storage unit stores the necessary passage process specification of the production line described above for each product type, that is, data of the passage essential process.

The selling price storage unit stores selling price (yen / ton) data for each product type. Here, examples of the selling price include a domestic price A, a domestic price B, an export price A, and an export price B.
The variable cost storage unit stores variable costs (yen / ton) for each passing process and each kind of production line. Here, the variable cost is, for example, for each converter in the case of an iron source process, for each hot rolling in the case of a hot rolling process, and in the case of a product process, the cost required for manufacturing is different for electrogalvanizing and tin plating. Is set.
Each storage unit described above constitutes a data storage unit. In addition, each data of an equipment capability memory | storage part, an equipment operation memory | storage part, an equipment repair memory | storage part, a passage process memory | storage part, a sales price memory | storage part, and a variable cost memory | storage part is like each data of a ship memory | storage part and an order memory | storage part These are stored in a database, and can be output in the form of a table, for example.

The shipment plan creation means of the plan creation system is for creating and storing a product shipment plan by ship in order to satisfy the delivery date of the product based on the order of the product. In planning a shipping plan, the ship's berthing arrangement plan (berth plan) created based on the data in the ship storage unit and the order storage unit, that is, which ship is attached to which quay and how long (the berthing and separation). Use the plan to moor)

The production plan creation means includes an uplink plan creation unit, a reorganization unit, and a downlink plan creation unit.
The ascending plan creation unit is a part that drafts a rough production plan from the final process of each production line to the converter in order from each product type to be shipped based on the product shipment plan described above. Note that the data of the equipment capacity storage unit, the equipment operation storage unit, the equipment repair storage unit, and the passage process storage unit are used when making a rough production plan.

In addition, the reorganization unit is a part that rearranges the production plan of the converter in the rough production plan created by the ascending plan creation unit in order to consolidate products into iron sources of the same steel type.
And a down plan preparation part is a part which makes the refined production plan which goes down from the converter to the final process of a production line based on the production plan of the converter rearranged in the reorganization part. It should be noted that each data of the equipment capacity storage unit, the equipment operation storage unit, the equipment repair storage unit, and the passing process storage unit is used for the preparation of the fine production plan.
For any one or more of the upstream plan creation unit, reorganization unit, and downstream plan creation unit, software called “Production Planner” sold by Aspentech Broner may be used. Is possible.

The calculation means is based on the total production price created by the production plan creation means, based on the total sales price calculated from the shipment amount of the product within a predetermined set period (for example, one month), and the product Calculate the difference in the total variable costs of the product processing amount within the set period required until it can be shipped, select the production plan that maximizes the difference, and determine the ship to ship the product to Is. This difference is called throughput (TP), which is a management index of revenue.
(TP) = (Sales unit price) × (shipment amount) − (variable cost unit price) × (processing amount)
Here, the processing amount includes the amount processed within the period even if the product is not shipped (that is, the product inventory amount). By reducing the product with the amount of processing, it is possible to make a plan that increases the throughput and enables higher profits.
In the calculation by the calculation means, data of the order storage unit, the sales price storage unit, and the variable cost storage unit are used.

Subsequently, a steel product production / shipment plan creation method according to an embodiment of the present invention will be described using the above-described plan creation system, but the process from the rough production plan to the fine production plan by the production plan creation means. For example, as disclosed in Patent Document 2, since it is substantially the same as the conventional method, the same parts will be described in a simplified manner.
First, as shown in FIG. 1, in step 1 (ST1), a ship storage unit, a facility capacity storage unit, a facility operation storage unit, a facility repair storage unit, a passage process storage unit, a sales price storage unit, and a data storage unit, The necessary data is input to the variable cost storage unit. Each piece of data can be acquired from, for example, a host computer that manages the data of each production line, or can be input (corrected) based on past operation results.
Next, in step 2 (ST2), order information (for example, product type, destination, and delivery date) from the customer transmitted from the host computer at the head office is input to the computer for order processing and data storage. It is input to the order storage part of the means.

In Step 3 (ST3), a shipment plan is prepared by the shipment plan creation means. Here, based on the order information input to the order storage unit, that is, the type and destination, a ship suitable for this condition is selected from the ship storage unit, and product orders are aggregated for each ship used for product shipment. To do. This totalization is performed so that the loading capacity of all products within a predetermined period (for example, about one month) of the product delivery date satisfies the minimum loading capacity of the selected ship. In addition, for example, if the varieties are the same and the delivery dates are the same or coming soon, they can be aggregated as one order group.

Then, a berth plan for the ship, that is, a plan for how long the berth of the ship is to be anchored is made in time for the delivery date of the order of the product input to the order storage unit.
As a result, it is possible to create a shipment plan for domestic products as well as a shipment plan for products for export.
In addition, for products for export, the date and time when products are loaded onto a ship is usually regarded as the delivery date (shipping date basis). On the other hand, for domestic products, it will be truck transport or coastal ship transport, and will be delivered in just in time delivery or automatically upon completion of production (shipment to the port warehouse near the customer or direct delivery depending on the customer's request) )

In step 4 (ST4), as shown in FIG. 2, the upstream plan creation unit of the production plan creation unit uses the delivery date of the product obtained in the product shipment plan created in step 3 as a reference, and the equipment capacity storage unit, Using each data of the equipment operation storage unit, the equipment repair storage unit, and the passing process storage unit, a rough production plan is created retroactively from the final process of each production line to the iron source process for each product to be shipped. In FIG. 2, the upper side of the vertical axis corresponds to the iron source process that is the upper process, and the lower side corresponds to the product process that is the lower process.

Here, the time axis (horizontal axis) is advanced in reverse to calculate the processing start and end time information in each manufacturing process, and the processing result is stored in the upstream plan creation unit. Since each product has its own order quantity, the total processing time for each manufacturing process and the movement time between processes are integrated, and by going back to the most upstream process, the production is most attracted on the delivery date. The processing start time information of the upper process is obtained.
However, the manufacturing apparatus of each manufacturing process has a manufacturing capacity and a time for repair, and even if an upward plan is simply created, the plan cannot always be executed. Therefore, from the plurality of equipment capacity patterns of the equipment capacity storage section, the plurality of equipment operation patterns of the equipment operation storage section, and the plurality of equipment repair patterns of the equipment repair storage section, each one data is selected and used. As shown in FIG. 3, a rough production plan is created that further considers the production capacity, operation time, and repair time (shaded area in FIG. 3) of each manufacturing apparatus.

In step 5 (ST5), the reorganization unit of the production plan creation means uses the converter production plan in the rough production plan created in step 4 as shown in FIG. □ part) is rearranged to aggregate by iron source of the same steel type. For example, the chemical condition, the casting width, the upper and lower limits of the lot mass, and the selection of the casting equipment are constrained conditions for integrating the steel types of the same iron source. This aggregation process is performed within a predetermined recombination possible period (for example, about one week).
And, for example, the iron source yield and the delay in delivery date (obtained by summing up the difference between the production request date of each product obtained from the rough production plan and the production date of each product obtained by the rearrangement for all orders. After summing up the plan delays and reordering as necessary, the rearranged converter production plan is stored in the reorganization unit.
In this way, by sorting into the same iron source varieties, it is possible to carry out rearrangement considering not only large transactions but also small transactions.

In step 6 (ST6), a facility plan storage unit based on the production date of each type of iron source respectively arranged in the production plan of the converter rearranged in step 5 by the down plan creation unit of the production plan creation unit. Using the data of the equipment operation storage unit, the equipment repair storage unit, and the passing process storage unit, a refined production plan that goes from the converter to the final process of each production line is created.
Here, the time axis (horizontal axis) is advanced to calculate processing start and end time information in each manufacturing process, and the processing result is stored in the downlink plan creation unit. As with the rough production plan, this refined production plan also includes a plurality of equipment capacity patterns in the equipment capacity storage section, a plurality of equipment operation patterns in the equipment operation storage section, and a plurality of equipment repair patterns in the equipment repair storage section. By selecting and using one piece of data for each, it is possible to create a precision production plan that takes into account the production capacity, operation time, and repair time of each production device.

In this step 6, when the delivery date of the product finally obtained from the precision production plan does not satisfy the required delivery date, that is, when the delivery date is broken, the process returns to step 4 again, and the delivery date is broken. The rough production plan is repeatedly created until it no longer occurs. When returning to step 4 again, the fact that the condition is inappropriate is stored in the uplink plan creation unit so that processing under that condition is not performed.
On the other hand, if the delivery date of the product obtained from the refined production plan satisfies the required delivery date in step 6, this refined production plan is stored in the downstream plan creation unit in step 7 (ST7). As described above, after the production plan is drawn up, the process returns to Step 1 again to reselect the data of each pattern of the equipment capacity storage unit and the equipment repair storage unit, and sequentially perform the processing from Step 2 onward. Create a refined production plan. In addition, when the pattern can be used in each pattern of the facility capacity storage unit, the facility operation storage unit, and the facility repair storage unit that has been input in advance, all the data without re-inputting the data of each pattern Is used to create a plurality of precision production plans and store them in the down plan creation unit.

Finally, in step 8 (ST8), the calculation means calculates the throughput using a plurality of precision production plans created by the above method.
Here, the sum of the sales prices is calculated by obtaining the product of the shipment amount of the products of the plurality of created production plans and the sales price unit price of the sales price storage unit. In addition, the total of variable costs is the amount of processing (including the amount of inventory) for each process on the production line that has passed until the product can be shipped in the multiple production plans created, and the fluctuation in the variable cost storage unit Calculate by calculating the product of the unit cost.
By the above method, a fine production plan using each pattern of the equipment capacity storage unit, equipment operation storage unit, and equipment repair storage unit that maximizes the throughput is selected and stored in the calculation means.

Subsequently, the orders for the products of the selected production plan are totaled for each ship used to ship the products stored in the ship storage unit, and the minimum load capacity for each ship type is the same for all the load types. Select and decide the ship that satisfies. And the data of the ship are stored in the calculation means, and the ship is ordered.
In the past, after the completion of production of about 80% of products, the subsequent production schedule was estimated and support for ship entry was given. However, based on this production and shipping plan, it was distributed before product production. Since ship instructions can be issued, it is possible to develop a plan for minimizing the time spent in the warehouse for products.
In addition, export ships do not load a single variety, but often ship a plurality of types together, and with this production and shipping plan, it is possible to create a plan that can handle assortments of multiple types.

The present invention has been described above with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and is described in the claims. Other embodiments and modifications conceivable within the scope of the above are also included. For example, the scope of rights of the present invention also includes a case where a production shipment plan creation system and production shipment plan creation method for steel products according to the present invention are configured by combining some or all of the above-described embodiments and modifications. It is.

It is a flowchart of the production shipment plan preparation method using the production shipment plan preparation system of the steel product which concerns on one embodiment of this invention. It is explanatory drawing of the temporary rough production plan created with the production shipment plan creation system. It is explanatory drawing of the rough production plan created with the same production shipment plan creation system. It is explanatory drawing of the refined production plan after the rearrangement created with the same production shipment plan creation system. It is explanatory drawing of the arrangement configuration of the computer to which the same production shipment plan preparation system is applied.

Explanation of symbols

10: Host computer, 11-14: Computer

Claims (6)

For shipping products produced in steel production facilities having one or more production lines equipped with one or more production lines equipped with iron source production equipment and other one or more production equipment on medium or large ships for export A production shipment planning system,
A shipping plan creation means for creating a shipping plan for the product by the ship to satisfy the delivery date of the product based on the order of the product;
Based on the shipping plan, an upstream plan creation unit that creates a rough production plan by going back to the iron source manufacturing apparatus in order from the final process of the production line for each type of product to be shipped, and the types are consolidated into an iron source of the same steel type Therefore, the reorganization unit that rearranges the production plans of the iron source production apparatus in the rough production plan created by the upstream plan creation unit, and the iron source production based on the rearranged production plans Production plan creation means comprising a down plan creation unit for creating a precision production plan that goes down from the device to the final process of the production line;
Based on the production plan created by the production plan creation means, the total of the sales price calculated from the shipment amount of the product within a predetermined setting period and the product can be shipped. A calculating means for calculating a difference of the total variable costs of the processing amount of the product within the set period, selecting a refined production plan having the largest difference, and determining the ship for shipping the product; A production / shipment plan creation system for steel products, characterized by comprising: In the production and shipping plan creation system for steel products according to claim 1, a ship storage unit for storing data of a load destination for each ship and a destination of the ship to be used,
An order storage unit for storing the order quantity and delivery date data for each product type and destination of the product;
A facility capacity storage unit for storing data of the production amount per unit time for each product type in each of the manufacturing apparatuses;
A facility operation storage unit for storing constraint conditions and operation shift data at the time of switching between the types in each manufacturing apparatus;
A facility repair storage unit for storing data of repair and construction period and start date of each manufacturing apparatus,
A passing process storage unit that stores data of a necessary passing process of the production line for each of the types;
A selling price storage unit for storing selling price data for each product type;
A variable cost storage unit for storing variable cost data for each passing step of the production line and the product type;
The ship that uses the order of the product that can be manufactured within a predetermined period based on the data of the ship storage unit and the order storage unit by the shipment plan creation means for shipping the product. For each type of ship, so that the minimum loading capacity for each type of ship is satisfied for all loading types,
Create the rough production plan based on the shipment plan by using the data of the equipment capacity storage unit, the equipment operation storage unit, the equipment repair storage unit, and the passing process storage unit by the upstream plan creation unit. And
By the reorganization unit, rearrangement of the production plan of the iron source production apparatus is performed within a predetermined recombination possible period,
The calculation means sums up the orders of the products of the selected production plan for each of the vessels used for shipping the products, and sets the minimum loading amount for each type of the vessel to all loading types. A production / shipment plan creation system for steel products, wherein the ship to be satisfied is selected and determined. The production and shipping plan creation system for steel products according to claim 2, wherein the facility capacity storage unit stores data of a plurality of facility capability patterns, the facility operation storage unit stores data of a plurality of facility operation patterns, The equipment repair storage unit stores data of a plurality of equipment repair patterns, and in the up plan creation unit and the down plan creation unit, the plurality of equipment capacity pattern data, the plurality of equipment operation pattern data, and A production / shipment plan creation system for steel products, wherein one piece of data is selected from each of the plurality of equipment repair pattern data. The production and shipping plan creation system for steel products according to claim 3, wherein the production plan creation means uses the data of the plurality of equipment capacity patterns, the plurality of equipment operation patterns, and the plurality of equipment repair patterns. Creating a plurality of said production plans,
The calculation means calculates the total sales price based on the data stored in the sales price storage unit from the shipment amount of the product within the set period until the product can be shipped. Calculated based on the data of the variable cost storage unit from the processing amount of each process of the production line within the set period passed through, the difference between the total of the selling price and the total of the variable cost is maximized A production / shipment plan creation system for steel products, wherein the refined production plan using an equipment capacity pattern, the equipment operation pattern, and the equipment repair pattern is selected. The production and shipping plan creation system for steel products according to any one of claims 1 to 4, wherein the iron source manufacturing apparatus is a converter and a manufacturing apparatus incidental thereto, wherein the one or more other manufacturing apparatuses are A production / shipment plan creation system for steel products, wherein the production device is a production device for the product arranged downstream of the iron source production device. Production of steel products using the production / shipment plan creation system for steel products according to any one of claims 1 to 5 to create a plan from production of the products to shipment by the ship. Shipment plan creation method.

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