JP4543972B2 - Production plan change system - Google Patents

Description

  The present invention provides a production plan change system used for changing the quantity of each type of product group already assigned to each production line when producing two or more types of product groups on two or more production lines. In particular, when the total production quantity for each production line is changed without changing the total production quantity for each type, any kind of product group quantity was determined during the adjustment adjustment of the product group quantity. The present invention relates to a production planning system that does not require readjustment of change in quantity due to exceeding the required production quantity.

  For example, in automobiles and home appliances, many types of intermediate products are manufactured on a plurality of production lines, and final products are manufactured on a final production line. In such a production line, a plurality of types of products are produced for each production line, but the number of products produced by type for each production line is the number of products produced by that type. It often happens that only the number of units produced for each production line is changed as originally planned. This is incurred, for example, when a sudden situation such as maintenance or failure of the production line occurs or according to the operating state of each production line.

  In this way, when reviewing the number of products produced for each production line, it is necessary to determine the number of products produced for each production line as quickly as possible. As a result, the number of products produced for each type was distributed by computer from the production line that was arbitrarily taken out, so the number of products produced of any type exceeded the initial planned production volume during the distribution. Such a problem occurred frequently. As a result, the workers in charge of production planning will eventually distribute each type of product production by production line so that the initial planned production quantity will be satisfied, and this work will take a lot of time. It was.

  For example, Patent Document 1 discloses a multi-line production planning device invented by the inventors. Such an apparatus can perform an appropriate production plan even when there is a restriction such as whether or not production is possible between a plurality of production specifications (types) and a plurality of production lines. In such a device, an alarm is issued when the allowable range (MAX, MIN) that is the production restriction for each line is not reached, so that the number of products, the number of kinds, the number of lines, the number of goods by type / number of lines are already in order. The production plan number is changed while keeping the determined number.

  Further, in Patent Document 2, when two or more types of product groups including types that can be produced on any of the two or more production lines are produced in a factory having two or more production lines, the respective types of products. An invention relating to a production allocation instruction apparatus for allocating and indicating a group to each production line is disclosed.

Japan Society for Invention and Innovation Public Technical Bulletin No. 2004-5000787 JP-A-5-23955

  According to the multi-line production planning device of Patent Document 1, the production planned number is changed while protecting the number already determined in the order of the number of products, the number of types, the number of lines, the number of types / number of lines. On the other hand, there are cases where the number of units by line initially determined at the stage of adjusting the number of production units cannot be maintained, and it is necessary to adjust the number of units again, thus solving the conventional problems described above. It does not lead to. The flow of the number change adjustment will be described as follows. (1) First, the production line with the largest number of captures is set as a reference line, and the number of lines by type is determined from the reference line. (2) Next, considering the number of units that are inevitably determined on each production line (the number of products produced only on such a production line), the types of each type are excluded, except for such units that are inevitably determined. Divide the number of units by line / line by the ratio of the number of units by type / line with respect to the remaining number of lines. According to this flow for changing the number of units, the number of units for each type of line of any type of product may exceed the maximum value of the number of units for each type, and processing may stop at that point. As a result, subsequent automatic calculations cannot be performed, and eventually the number change adjustment by the worker is forced.

  On the other hand, according to the production allocation instruction device of Patent Document 2, it is possible to search for and determine an allocation pattern that best matches the planned number from among all possible allocation patterns. However, in the processing by such equipment, it is not assumed that there is a production line in the production line where the product production volume decreases. Therefore, if the product production quantity increases or decreases for each production line, change adjustment of the product production number is adjusted. I can't do it.

  The present invention has been made in view of the above-described problems. When the total production quantity for each production line is changed without changing the total production quantity for each type, the product group quantity change adjustment is in progress. It is an object of the present invention to provide a production plan change system that does not require re-adjustment of the quantity change when any kind of product group quantity exceeds the determined required production quantity. Here, the change in the total production quantity for each production line includes both cases where the number of production increases and decreases for each production line.

  In order to achieve the above object, the production plan change system according to the present invention, when producing two or more kinds of product groups on two or more production lines, determines the quantity of each kind of product group already assigned to each production line. A production plan change system used for changing, wherein the production plan change system includes a first required production quantity unique to each production line and a second required production quantity unique to each type of product group. Storage means for storing each type of product group quantity produced for each production line, and each production line without changing the specific second required production quantity for each type of product group And adjusting means for adjusting the quantity of each type of product group produced for each production line when the first required production quantity is changed, and the storage means is changed. When the first required production quantity is stored, the adjustment means sequentially starts from the production line with the largest decrease in the first required production quantity after the change compared to before the change. The product group quantity for each type on the production line where the quantity is changed is adjusted, and the first required production quantity after the change is prorated according to the ratio of the product group quantity before the change. The product group quantity for each type in the production line where the quantity increases is calculated by dividing the quantity of the first required production quantity proportionally according to the ratio of the remaining product group quantity before the change. The product group quantity for each type in the production line with the largest increase in the first required production quantity is the product group quantity for the last remaining type. It is characterized by doing.

  Here, two or more production lines mean one or a plurality of production lines in a plurality of scattered plants in addition to a plurality of production lines in one plant. The production plan change system according to the present invention comprises at least storage means and adjustment means built in the computer. In the storage means, the production quantity (first required production quantity) determined for each of the plurality of production lines is input and stored via the keyboard by the worker in charge of the production plan. In each production line, a necessary production quantity (second necessary production quantity) is determined for each of a plurality of types of product groups, and the necessary production quantity is also input to the storage means. Here, as a matter of course, the total required production quantity of the product group and the total required production quantity for each production line coincide.

  Furthermore, the production quantity (product group quantity) of each type of product is assigned in advance for each production line, and such data is also input to the storage means.

  Here, in order to change the production quantity for each production line without changing the total production quantity of each type of product, the changed production quantity is input to the storage means. For example, there are three production lines, Line A, Line B, and Line C. Initially, 185 units were produced in Line A, 180 units were produced in Line B, and 245 units were produced in Line C. If so, increase the number of production in line A to 200, increase the production in line B to 300, and reduce the production in line C to 110 (total 610) That is. Note that the number of units produced in each production line is the total number of units produced for each of the types 1 to n.

  When the production quantity for each production line after the change is input to the storage means, the adjustment means is activated. First, the allocation order of the product production quantity is determined in order from the production line with the largest decrease in production quantity due to the quantity change. Is done. In the above example, line C is allocated first because of the quantity reduction, then the product production number is assigned first, then the line A with the smallest quantity increase, and finally the line B with the largest quantity increase is assigned. It becomes.

  Next, a specific adjustment method for changing the number of products produced by the adjustment means is different in the calculation method for a production line in which the number of product production decreases and a production line in which the number of product production increases. The calculation method of the product group quantity for each type in the production line where the number of product production decreases is changed according to the ratio of the product group quantity of each type of product before the change. This is a method of apportioning the total quantity of the later target production line.

  On the other hand, the method of calculating the product group quantity for each type in the production line where the number of product production increases is changed to the quantity that is apportioned in proportion to the ratio of the remaining product group quantity. This is a method of adding to the product group quantity for each previous type.

  Finally, the production line with the largest increase in production volume after the change will remain. In such a production line, the remaining total quantity of each type of product is allocated, so that the total production after the change in the production line is made. The quantity can be satisfied.

  In the present invention, among the plurality of production lines, the product production quantity is allocated in order from the production line in which the quantity reduction is the largest, so that any kind of product is determined more than the necessary production quantity determined during the allocation. And therefore no need to readjust the quantity change.

  In another embodiment of the production planning system according to the present invention, when two or more kinds of product groups are produced on two or more production lines, the quantity of each kind of product group already assigned to each production line is determined. A production plan change system used for changing, wherein the production plan change system includes a first required production quantity unique to each production line and a second required production quantity unique to each type of product group. Storage means for storing each type of product group quantity produced for each production line, and each production line without changing the specific second required production quantity for each type of product group And adjusting means for adjusting the quantity of each type of product group produced for each production line when the first required production quantity is changed, after the change to the storage means When the first required production quantity is stored, the adjustment means, in order from the production line with the largest decrease in the first required production quantity after the change compared to before the change, the product group quantity for each type The product group quantity for each type on the production line where the quantity is reduced is the product group quantity produced only on the production line or the product group quantity already assigned to another production line The remaining product group quantity is assigned a product group quantity that is necessarily fixed, consisting of products that will be produced only on the production line, then the product group quantity for each type, and changes Subtract the necessarily fixed product group quantity from the first required production quantity after the change, depending on the ratio of the previous first required production quantity to the quantity that is necessarily subtracted the fixed product group quantity. The quantity is apportioned The product group quantity for each type on the production line where the quantity is calculated is calculated as follows: The product group quantity for each type before the change is the ratio of the first required production quantity increase to the remaining product group quantity. The product group quantity for each type in the production line with the largest increase in the first required production quantity is the product group quantity for each type remaining at the end. .

  In the present invention, when there are products that can be produced only on an arbitrary production line among a plurality of types of products, or an arbitrary product can be produced only on a plurality of specific production lines (for example, in the above example, the line C is produced only on line C and line A), and allocation has already been made on some of the production lines (a predetermined quantity has been assigned on line A), and the remaining product is inevitably left. This corresponds to the case of being produced on the production line (produced on line C). Actually, such cases are common, so for products that are inevitably allocated to an arbitrary production line during the calculation, automatic allocation is performed as needed to improve the allocation calculation efficiency. Accuracy can be increased.

  The outline of the system is not changed from the storage means and adjustment means built in the computer as described above, but the product group quantity inevitably fixed to each production line as described above. By taking into consideration, the calculation method in the adjusting means is changed as follows.

  First, the flow for assigning product production quantities in order from the production line in which the production quantity decreases most with the production quantity change is the same as the production plan change system described above.

  Next, regarding the method of calculating the product group quantity for each type on the production line where the quantity decreases, first consider the products produced only on the production line or the product group quantities already assigned to other production lines. Then, the remaining product group quantity is assigned a fixed product group quantity, which is inevitably composed of products to be produced only on the production line. Next, the first required production quantity after the change, depending on the ratio of the product group quantity of each type to the quantity obtained by subtracting the fixed product group quantity from the first required production quantity before the change. The quantity obtained by subtracting the fixed product group quantity from the above is apportioned to each type of product.

  On the other hand, as for the product group quantity for each type on the production line where the quantity increases, the product group quantity for each type before the change and the increase quantity of the first required production quantity remained as in the calculation method described above. According to the ratio of the product group quantity, the quantity allocated to each type of product is added.

  In the present invention, even when the production quantity increases in an arbitrary production line (for example, an increase of 25 units), when the above-mentioned necessarily fixed product group quantity is considered. (If such quantity is 30), the increase in number to be allocated and allocated to each type of product becomes negative, and as a result, it may be necessary to apply a calculation method when the quantity decreases. Therefore, when the production quantity increases, the difference between the increase quantity and the fixed product group quantity is calculated, and when the increase quantity is larger, the above-mentioned production quantity increases. When the calculation method is applied and the increase quantity is smaller, the calculation flow applies the calculation method in the production line in which the quantity decreases.

  As can be understood from the above description, according to the production plan change system of the present invention, the production quantity for each of the plurality of production lines is changed without changing the total production quantity and the required production quantity for each type. In this case, the required production in which any kind of product is determined in the middle of the allocation by sequentially allocating the product group quantity from the production line that has the largest decrease in the product production quantity after the change compared to before the change. It is not possible to exceed the quantity, and a quick and accurate product production quantity can be assigned to each production line. In addition, according to this invention, it can respond to all quantity change cases including the case where a product production quantity increases / decreases for every production line, or the case where the product produced only in arbitrary production lines exists.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram for explaining the outline of the production plan changing system of the present invention, FIG. 2 is a diagram for explaining details of the storage means, and FIG. 3 is a production plan changing flow in the adjusting means. . 4 to 7 are diagrams illustrating an embodiment of the production plan change in order, FIGS. 8 to 11 are diagrams illustrating another embodiment of the production plan change in order, and FIGS. It is the figure which showed further another embodiment of the production plan change. In the illustrated embodiment, three production lines and eight types of products are shown, but it goes without saying that the production plan change system of the present invention is not limited to such an embodiment. .

  FIG. 1 shows a schematic configuration of a production plan change system 1, in which a storage unit 3 and an adjustment unit 4 are built in a computer 2, and data input to the storage unit 3 is performed by a plurality of managements for performing production plans. Are input from the computers 5, 5,. Various data input and stored in the storage means 3 are sent to the adjustment means 4, where the adjustment means 4 performs calculations based on a production plan change flow described later, and the calculation results are sent to the storage means 3 sequentially. Are output on an output screen (not shown). The storage means 3 includes a necessary production quantity (first necessary production quantity 31) in each production line, a necessary production quantity for each of a plurality of types of products (second necessary production quantity 32), and production in each production line. When the first required production quantity in each production line is changed, the first required production quantity 34 after the change is input. Further input.

  An input example in the storage means 3 is shown in FIGS. Here, three lines (line A, line B, line C) are set, the total of the first required production quantity (multiple types of product group quantity) in each production line, and the first after the change The total required production quantity and the breakdown of the production quantity of each production line (product group quantity) are entered. Here, the breakdown of each production line of the first required production quantity is set and input in advance, and the breakdown of each production line of the first required production quantity after the change is input later. When such a breakdown is input, the adjustment means 4 is activated at that time, and the increase / decrease of the production quantity in each production line is calculated (corresponding to the difference in the number of units in the figure). In order, the reference line, that is, the production line corresponding to the order of allocation of the product production quantity is determined and stored in the storage means 3. In the illustrated embodiment, the line C in which the product production quantity decreases along with the change becomes the reference line 1, the line A with the next smallest increase quantity becomes the reference line 2, and the line B with the largest increase quantity becomes the reference line 3. It has become.

  FIG. 2b shows the breakdown of the initial plan in which the product group quantities of a plurality of types of products (here, 8 types from product 1 to product 8) are assigned to each of lines A, B, and C. Is remembered. Here, the x mark means that the corresponding product is not produced on the production line. For example, the product 6 is produced only on the line A, the product 7 is produced only on the line B, and the product 8 is produced only on the line C. Therefore, for example, the required production quantity of the product 6 is 10 units, but it is all produced on the line A, and is a product group quantity necessarily fixed on the line A. If attention is paid to the product 5, the product is produced only on the line B and the line C. The product production quantity is allocated from the line C which is the reference line 1, and the product group quantity on the line is determined. Once determined, the value of the product group quantity in line B is automatically determined without waiting for other calculations.

  FIG. 3 shows a production plan change flow in the adjusting means 4. A specific calculation example will be described later. First, in step 1 (S1), the reference lines 1, 2, and 3 are selected as described above. Next, in step 2 (S2), calculation is performed when the product quantity decreases for the reference line 1. Here, when the product quantity decreases, the product group quantity that is necessarily fixed in the reference line 1 is allocated first, and this necessarily fixed product from the first required production quantity after the change. The quantity obtained by subtracting the group quantity is calculated (referred to as quantity A). On the other hand, the ratio of the product group quantity of each type of product before the change excluding the fixed product group quantity is obtained, and the product group quantity of each type of product is obtained by multiplying the quantity A by the respective ratio. Calculate.

  If there is a product group quantity that is inevitably fixed in the other production lines due to the assignment of the product group quantity of the reference line 1, the product group quantity is assigned and the remaining production lines are assigned. Is calculated (step 3 (S3)).

  Next, the process proceeds to step 4 (S4), and the remaining increment number in the reference line 2 is calculated. Here, in response to the completion of the allocation of the reference line 1, if there is an inevitably fixed product group quantity in the reference line 2, the product group quantity is increased from the increased quantity increased before and after the original change. By subtracting, the total of the product group quantity of the kind of product that actually requires apportioning is calculated.

  Here, it is determined whether or not the value obtained by subtracting the product group quantity inevitably fixed from the increased quantity before and after the change (remaining incremental quantity) is zero or more (step 5 (S5)). In the case of (1), the process proceeds to step 6 (S6) and a calculation method for increasing the production quantity is performed. Here, the calculation method for increasing the production quantity is based on the proportion of the remaining incremental quantity in step 5 according to the ratio of the incremental number of the remaining production lines for each type of product calculated in step 3, and this quantity. Is added to the quantity of the reference line 2 before the change.

  On the other hand, if the value obtained by subtracting the product group quantity inevitably fixed from the increased quantity before and after the change (remaining incremental quantity) is less than zero, the process proceeds to step 7 (S7) and described above. Perform calculations to reduce production volume.

  The assignment of the product group quantity in the reference line 2 is completed through either step 6 or step 7, and the last remaining product group quantity is assigned to the reference line 3 (step 8 (S8)). The allocation of the product group quantity in the production line is completed.

  The production plan change flow in FIG. 3 will be described based on the following three embodiments.

  One embodiment is shown in FIGS. First, the allocation shown in FIG. 4 is made as an initial production plan. Here, taking into account the increase / decrease in the quantity before and after the change, the reference line 1 is determined as line C, the reference line 2 is determined as line A, and the reference line 3 is determined as line B.

  In the reference line 1, a calculation is performed when the product quantity decreases, and the result is shown in FIG. Here, although the production quantity after the change in the reference line 1 is 110, since the product 8 is produced only in the line, 80 units obtained by subtracting 30 from 110 are other types of products (products 1, 2, 3). , 5). The ratio for allocating 80 units to each product is the product group quantity of each product before the change in the numerator, and the denominator is the number of products 8 from the required production quantity (245 units) of the production line before the change. The subtracted 215 is the set ratio. For example, for product 1, 5/215 × 80 = 2 is calculated.

  Next, before moving to the reference line 2 (line A), the product group quantity of the reference line 1 is confirmed, so that the product group quantity of the product 5 of the line B is changed from 30 to 55 and confirmed ( (See FIG. 6).

  Next, when incremental calculation is performed for each type of product in the remaining lines, product 1 is allocated to another line by changing the number of products from 5 to 2 in reference line 1, and product 2 Thus, 50 units are allocated to other lines by changing from 80 units to 30 units, and 57 units are allocated to other lines by changing from 90 units to 33 units in product 3, for a total of 110 The number of units will increase in other lines.

  In calculating the product group quantity of the reference line 2 (line A) shown in FIG. 6, it is inevitably determined by the line A when the line C is fixed and the increase in the number of units before and after the change in the line A (15 units). If there are types of products, the difference with the number of such products is calculated. In the present embodiment, since there is no product of a type that is inevitably determined by line A when line C is determined, the difference between the increase in the number of units of 15 and 0 is 15 and zero or more. Then, the calculation to increase the production quantity is performed.

  For example, in the product 1, 15 of the above-mentioned increase in the number of units in the line A is apportioned at a ratio of three of the total number of 110 units allocated to the other lines, and the number of the units and the initial number of 115 units Is added. Therefore, 3/110 × 15 + 115 = 115 (rounded off after the decimal point). Product 2 is 50/110 × 15 + 20 = 27 units.

  By determining the product group quantity of the reference line 2, the calculation of the remaining reference line 3 is performed by simply allocating the remaining number for each type of product as shown in FIG.

  As another embodiment, the number of production before and after the change in the reference line 2 is less than zero, and it is still less than zero even when the increase / decrease in the number of products inevitably determined for the line is considered. 8 to 11 show cases in which the allocation calculation in line 2 follows the calculation method when the number of production units decreases. FIG. 8 shows an initial plan. The reference line 1 is set to the line C, the reference line 2 is set to the line B, and the reference line 3 is set to the line A.

  In FIG. 9, the result of the allocation calculation at the reference line 1 is shown first. Here, calculation when the product quantity decreases is performed. For example, for product 5, 40 / (310-30) × (110-30) = 11 is calculated.

  Next, the allocation calculation of the reference line 2 (line B) shown in FIG. 10 is performed. As the product group quantity in the line C is fixed, the quantity of the product 5 produced only in the lines B and C is automatically set. Confirm. That is, since the total production quantity (second required production quantity) of the product 5 is 70 units from FIG. 8, the product group quantity of the product 5 produced on the line B is 59 units.

  Next, if the difference between the increase / decrease in the production quantity before and after the change in line B and the increase / decrease in the product quantity inevitably determined in line B by determining the allocation of line C is considered, the former is from 220 to 150 -70 units, and the latter becomes 29 units when the product 5 increases from 30 units to 59 units, and becomes -70-29 = -99 units, which is less than zero. Therefore, the calculation for the line B is also performed when the product quantity decreases. For example, for product 1, 40 / (220-20-30) × (150-20-59) = 17 units is calculated.

  When the reference line 2 is established, the product group quantity in the remaining reference line 3 is assigned by assigning the remaining product group quantity (see FIG. 11).

  Finally, as yet another embodiment, a product that is apportioned when the number of production before and after the change in the reference line 2 is zero or more and the increase or decrease in the number of products that are inevitably determined for the line is taken into account. FIGS. 12 to 15 show a case where the increase / decrease quantity is less than zero, and therefore the allocation calculation in the reference line 2 follows the calculation method when the number of production decreases. FIG. 12 shows an initial plan. Reference line 1 is set to line C, reference line 2 is set to line B, and reference line 3 is set to line A.

  In FIG. 13, the result of the allocation calculation at the reference line 1 is shown first. Here, calculation is performed when the product quantity decreases. For example, for product 1, 70 / (310-30) × (110-30) = 20 units is calculated.

  Next, when the difference between the increase / decrease in the production quantity before and after the change in line B and the increase / decrease in the product quantity inevitably determined in line B by determining the allocation of line C is considered, the former is from 220 to 240 As a result, the number of products increases from 30 units to 59 units to 29 units, and the number of units becomes 29 units, and 20−29 = −9 units, which is less than zero. Therefore, the calculation for the line B is also performed when the product quantity decreases. For example, for product 1, 40 / (220-20-30) × (240-20-59) = 38 units is calculated (see FIG. 14).

  Finally, as shown in FIG. 15, the product group quantity in line A is assigned and all calculations are completed.

  As is clear from this embodiment, even if the product production quantity simply increases before and after the change, if the increase / decrease in the quantity inevitably determined in the actual production line is taken into consideration, In some cases, the increase quantity distributed to the product is negative, and therefore the calculation method must be changed. According to the production plan change system of the present invention, it is possible to deal with any quantity change case, and thus it is possible to change the production plan with high accuracy in a short time.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

The block diagram explaining the outline | summary of the production plan change system of this invention. (A), (b) is the figure explaining the detail of the storage means. Production plan change flow in the adjustment means. The figure which showed one Embodiment of a production plan change, Comprising: The figure which showed the initial production plan. The figure which showed the product group quantity in the reference line 1 after a change in embodiment of FIG. The figure which showed the product group quantity in the reference line 2 after a change in embodiment of FIG. The figure which showed the product group quantity in the reference line 3 after a change in embodiment of FIG. The figure which showed other embodiment of the production plan change, Comprising: The figure which showed the original production plan. The figure which showed the product group quantity in the reference line 1 after a change in embodiment of FIG. The figure which showed the product group quantity in the reference line 2 after a change in embodiment of FIG. The figure which showed the product group quantity in the reference line 3 after a change in embodiment of FIG. The figure which showed other embodiment of the production plan change, Comprising: The figure which showed the original production plan. The figure which showed the product group quantity in the reference line 1 after a change in embodiment of FIG. The figure which showed the product group quantity in the reference line 2 after a change in embodiment of FIG. The figure which showed the product group quantity in the reference line 3 after a change in embodiment of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Production plan change system, 2 ... Computer, 3 ... Storage means, 31 ... First required production quantity, 32 ... Second required production quantity, 33 ... Product group quantity, 34 ... First required production after change Quantity 4 ... Adjustment means 5 ... Input means

Claims (2)

A production plan change system used to change the quantity of each type of product group already assigned to each production line when producing two or more types of product groups on two or more production lines,
The production plan change system includes a first necessary production quantity unique to each production line, a second necessary production quantity unique to each kind of product group, and each kind of product group produced for each production line. Production when the first required production quantity for each production line is changed without changing the storage means for storing the quantity and the second required production quantity specific to each type of product group Adjustment means for adjusting the quantity of each type of product group produced for each line, and at least
When the first required production quantity after the change is stored in the storage means, the adjustment means starts from the production line in which the decrease in the first required production quantity after the change is larger than before the change. The product group quantity for each type is changed and adjusted, and the product group quantity for each type on the production line where the quantity decreases is changed according to the ratio of the product group quantity before the change. The product group quantity for each type in the production line, which is calculated by dividing the required production quantity of the product, is prorated according to the ratio of the remaining product group quantity to the increase quantity of the first required production quantity. Is added to the product group quantity for each type before the change, and the product group quantity for each type in the production line with the largest increase in the first required production quantity is the last remaining type Each product group quantity Production planning change system according to claim. A production plan change system used to change the quantity of each type of product group already assigned to each production line when producing two or more types of product groups on two or more production lines,
The production plan change system includes a first necessary production quantity unique to each production line, a second necessary production quantity unique to each kind of product group, and each kind of product group produced for each production line. Production when the first required production quantity for each production line is changed without changing the storage means for storing the quantity and the second required production quantity specific to each type of product group Adjustment means for adjusting the quantity of each type of product group produced for each line, and at least
When the first required production quantity after the change is stored in the storage means, the adjustment means starts from the production line in which the decrease in the first required production quantity after the change is larger than before the change. The product group quantity for each type is changed and adjusted, and the product group quantity for each type on the production line where the quantity decreases is the product produced only on the production line, or already another production line In consideration of the product group quantity assigned to the product group quantity, the remaining product group quantity is assigned a product group quantity that is necessarily fixed, consisting of products that are produced only on the production line, and then each type. Inevitably fixed from the first required production quantity after the change, depending on the ratio between the product group quantity of the first and the first required production quantity before the change minus the fixed product group quantity Deducted product group quantity The product group quantity for each type in the production line, which is calculated by apportioning the prorated quantity, and the quantity increases, remains the increase in the first required production quantity in the product group quantity for each type before the change. The product group quantity for each type in the production line with the largest increase in the first required production quantity is calculated as the product group quantity for the last remaining type. A production plan change system characterized by

Images