JP2009128998A - Member receipt/delivery plan management device and receipt/delivery plan management method in production management - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a receipt/delivery plan management device and a receipt/delivery plan management method for managing a member receipt/delivery plan in a production management, capable of achieving MRP management performed for each product number. <P>SOLUTION: A quantity used of members designated by the production plan, a present quantity of inventory, and a scheduled receiving quantity of members are acquired from a production plan managed for each product number, inventory information, and an ordering quantity. Shortage and excess of the members on each day is calculated by developing the information to the MRP and creating a receipt/delivery plan. In the case that a day with a lack of the members is detected, a scheduled receiving date is updated so as to advance an order if there is any ordering information of an unprocessed order capable of compensating the shortage quantity by retrieving a receiving schedule on and after the day when the shortage occurs, not by immediately adding new ordering information. In a case that ordering information capable of compensating the shortage quantity is already processed, a warning for urging delivery adjustment is notified. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a receipt / payment plan management apparatus and a receipt / payment plan management method for managing a receipt / payment plan for components that need to be procured in production management.

  Production management systems used in the manufacturing industry require an efficient parts management mechanism to shorten delivery times and reduce production costs. There are known production number management in which members are associated with numbers, and MRP management in which the total amount of the entire inventory of members is managed regardless of the production number.

  The production number management method has the advantage that it is easy to grasp the correspondence between the production plan and the parts because the production numbers of the products that will use the parts are allocated to the parts to be stocked or procured. However, when the production plan is changed due to an abrupt order, there is a problem that an operation for changing the assignment of the product number occurs. On the other hand, in the MRP management method, the quantity that needs to be procured from the required quantity and inventory quantity at a certain point in time is managed in the entire production plan. Since the relationship is not specified, there is a problem that it is difficult to grasp the influence on the production plan when a difference occurs between the procurement plan and the actual result of the member.

  Considering the characteristics of the two methods as described above, it is desirable to use the strengths of the two methods in combination. As an example of the combined use method, for example, a method in which a production number regularly allocated to inventory etc. is removed based on production number management, the quantity at that time is reviewed by MRP, and a production number allocation is reviewed again There is. In the case of this method, it is a technical problem to increase the MRP speed in order to increase the frequency of MRP implementation (see paragraphs 0008 to 0010 of Patent Document 1).

  As another example of the combined use method, a method in which a member managed in the total amount by MRP management or the like allocates a production number for each member at an appropriate timing and shifts to production management (paragraphs 0045 to 0046 of Patent Document 1). Etc.), a method of switching between production number management and MRP management according to the manufacturing process (see Non-Patent Document 1) and the like.

JP 2003-316416 A Reed Rex Co., Ltd., R-PiCS homepage "Linux version / MRP management & serial number management" [Search November 13, 2007], Internet <URL: http://www.r-pics.com/linux/ mrp.htm>

  In addition to the combined method as described above, a method of performing MRP management that is normally performed in units of factories or warehouses in units of product numbers assigned in the production plan is conceivable. According to such a method, it is possible to create a receipt / payment plan within the frame of the product number while taking advantage of the feature of the product number management and quickly grasp the excess or deficiency of the members by the MPR management.

  However, MRP management has a mechanism to grasp the total amount of members within a certain frame and manage the members so that there is no excess or deficiency by adding a procurement plan when the shortage occurs. If the MRP management is performed within the frame of the serial number assigned without excess or deficiency, there arises a problem that the additionally procured members will eventually become surplus. In the production number management system, the member allocated to the production number is in principle not diverted to other production numbers. Therefore, the extra member has to be reassigned to another production number. It will end up.

  The present invention has been made to cope with such a problem, and it is possible to realize MRP management for each product number, and it is possible to realize a payment plan management for managing a material payment plan in production management. An object of the present invention is to provide a device and a management method for a payment plan.

  The present invention that solves such a problem is a receipt / payment plan management apparatus that manages a receipt / payment plan for parts in a production plan, and associates the quantity of parts used on each day based on the production plan of the product with a production number. Manufacturing plan storage means for storing the information, inventory information storage means for storing the stock quantity of the member in association with the product number, and whether the planned procurement date, the received quantity, and ordered or not ordered for the procurement schedule of the member Order information storage means for storing the specified order information in association with the product number, the used quantity corresponding to one product number from the manufacturing plan storage means, and the inventory quantity corresponding to the product number from the inventory information storage means Then, the order information corresponding to the product number is read from the order information storage means, and the excess and deficiency of the number of members in the product number with respect to the used quantity on each day Order receiving information for which the planned receipt date is designated as the next day or later when the date when the quantity of the member is insufficient is detected by the receipt / payment plan calculation means, and the receipt / payment plan calculation means calculates the received quantity included in the information in time series Ordering information specifying means for specifying ordering information for which the receiving quantity sufficient for the shortage quantity on the lacking day is specified, and ordering for the ordering information specified by the ordering information specifying means Order receipt information updating means for updating the planned receipt date specified in the order information on a date before the date when the member is insufficient, if specified as incomplete. It is.

  Further, the present invention provides a warning indicating that it is necessary to adjust the delivery date of the order or the production adjustment of the product according to the ordering information when the ordering information specified by the ordering information specifying unit is designated as ordered. Delivery date adjustment warning means for outputting to the output device may be provided.

  Further, according to the present invention, when all the order information corresponding to the product number is searched by the order information specifying unit, if the received quantity is insufficient for the shortage quantity, the received quantity that is sufficient for the shortage quantity is designated. Order information generating means for generating the new order information and storing it in the order information storage means may be provided.

  As described above, according to the present invention, by using the production plan, inventory information, and ordering information managed for each product number, the used quantity of the member, the inventory quantity, and the received quantity are expanded in the MRP, so that the excess of the member for each day. If a shortage is calculated and a day when a shortage of parts is detected, a new order is not added immediately. Therefore, it is possible to avoid the surplus of members and to perform MRP management for each product number.

  The members in the present invention include not only parts that are incorporated as they are in the assembling process but also materials whose shape and attributes are changed by machining in the machining process. In the present invention, the procurement schedule of members recorded in the ordering information is not limited to procurement of components from outside the company, but includes procurement from other departments in the in-house process. Whether the order is specified or not yet specified in the order information is not limited to the ordering from the outside, but also includes work instructions such as processing and assembly in the in-house process.

  The present invention can also be specified as a payment plan management method executed by the payment plan management apparatus according to the present invention.

  A method for managing a payment plan according to the present invention includes a manufacturing plan storage means for storing a used quantity of a member for each day based on a manufacturing plan of a product in association with a manufacturing number, and an inventory quantity of the member as a manufacturing number. Inventory information storage means for storing in association with each other, and ordering information storage means for storing the ordering information in which the planned receipt date, the received quantity, and whether the order has been ordered or not yet ordered is specified in association with the product number A management method for managing a receipt / payment plan for a member in a production plan, which is executed by a computer comprising the manufacturing plan storage unit, wherein the computer receives a used quantity corresponding to a production number from the production plan storage means. The stock quantity corresponding to the product number is read from the stock information storage means and the order information corresponding to the product number is read from the order information storage means, respectively, and A receipt / payment plan calculating step for calculating an excess or deficiency of the number of members in the production number according to a time series from the received quantity included in the inventory quantity and the ordering information; and the computer, in the receipt / payment plan calculating step, When a shortage date is detected, the order information specified as the next day after the next day is searched in time-series order, and the received quantity sufficient for the shortage date is specified. An ordering information specifying step for specifying ordering information; and if the ordering information specified in the ordering information specifying step specifies that the order has not been completed, the computer receives the scheduled receipt date specified in the ordering information as the member And a purchase order information updating step for updating the order information on a date before the date when the payment is insufficient.

  In addition, according to the method for managing a payment plan according to the present invention, when the computer is designated as ordered in the ordering information specified in the ordering information specifying step, the delivery date adjustment of the ordering based on the ordering information or the product A delivery date adjustment warning step for causing the output device to output a warning indicating that production adjustment is necessary may be provided.

  In the management method of the payment plan according to the present invention, when the computer retrieves all the order information corresponding to the product number in the order information specifying step, if the received quantity is insufficient for the shortage quantity, There may be provided an order information generation step of generating new order information in which the received quantity sufficient for the shortage quantity is designated and storing the new order information in the order information storage means.

  According to the present invention, when performing the MRP management of the member quantity for each product number, it is possible to avoid the procurement of a member more than the scheduled use quantity and to realize the combined use of the product number management and the MRP management. As a result, it is possible to enjoy the advantages of MRP management that makes it easy to respond to changes in the production plan, while taking advantage of the production number management that makes it easy to grasp the correspondence between the production plan and the members. Can contribute to the improvement of efficiency.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings. The following description shows an example of an embodiment of the present invention, and the present invention is not limited to the following embodiment.

  FIG. 1 is a block diagram showing an example of the configuration of a payment plan management apparatus according to the present invention. FIG. 2 is a diagram illustrating an example of the manufacturing plan storage unit in the payment plan management apparatus according to the present invention. FIG. 3 is a diagram showing an example of an inventory information storage unit in the payment plan management apparatus according to the present invention. FIG. 4 is a diagram showing an example of an order information storage unit in the payment plan management apparatus according to the present invention. FIG. 5 is a diagram showing a first example (a state in which there is a shortage in inventory) in which the member payment plan is developed by MPP in the payment plan management apparatus according to the present invention. FIG. 6 is a diagram showing a second example (a state in which an unordered receipt schedule is advanced) in which the receipt / payment plan for members according to the present invention is developed by MPP. FIG. 7 is a diagram showing a third example (a state in which it is an accepted receipt plan that has already been issued and cannot be moved forward) in which the member receipt / payment plan is developed by MPP in the receipt / payment plan management apparatus according to the present invention. FIG. 8 is a flowchart showing a flow of MPP development of a member payment plan by the payment plan management apparatus according to the present invention. FIG. 9 is a flowchart showing a flow when a shortage of members occurs in a payment plan developed by MPP by the payment plan management apparatus according to the present invention.

  In FIG. 1, the payment plan management apparatus according to the present invention is constituted by a part of functions of a production management system 10. The computer constituting the production management system 10 may be used stand-alone, or may be used in a client server type in a network such as a LAN. In the former case, the input / output device 20 corresponds to a stand-alone computer input device (keyboard or mouse) or output device (display or printer). In the latter case, the input / output device 20 includes a LAN or the like. The client terminal that can be connected to the network corresponds to the server that can be accessed from the client terminal in the production management system 10.

  The production management system 10 is a computer including at least a CPU, a main memory, and an HDD. The product number management unit 11, the payment plan unit 12, and the warning notification unit 13 are all functionally specified, and an application program is read from the HDD to execute each function, and the main memory, etc. Each function is executed by the CPU performing arithmetic processing while the memory area functions as a work area for the application program.

  A predetermined storage area is allocated in the HDD of the production management system 10 to each of the configuration master storage unit 14, the manufacturing plan storage unit 15, the inventory information storage unit 16, and the order information storage unit 17. A part may be provided in another computer such as a database server connected to the production management system 10.

  The configuration master storage unit 14 stores data such as the number of members used for manufacturing products. When a product production plan is registered in the production plan storage unit 15, when the production number management unit 11 is activated and information relating to the production schedule such as the product production quantity and production date is designated, a predetermined unit of the product is designated. A production number is assigned every time, and the number of members to be used in each production number is specified with reference to the configuration master storage unit 14. From these pieces of information, a production plan as illustrated in FIG. 2 is developed.

  The production plan storage unit 15 stores data relating to the number of members to be used according to the production schedule for each production number assigned by the production number management unit 11. The format of the data stored here is not particularly limited. For example, as shown in FIG. 2, the item code of the member used for each product number is specified, and each member is used every day. The number of members to be recorded is recorded. From these data, it is possible to grasp the quantity of members used on each day for each product number.

  The format of data stored in the inventory information storage unit 16 is not particularly limited, but as illustrated in FIG. 3, the quantity of members stored for each facility such as a factory or a material warehouse is stored. Yes. For these members, when the production number used by the production number management unit 11 is allocated at a predetermined timing, the allocated production number is recorded in the corresponding record (the production number is recorded in the member before allocation). It has not been).

  The format of the data stored in the order information storage unit 17 is not particularly limited, but as illustrated in FIG. 4, regarding the procurement schedule of the member, there is data regarding the quantity, the expected date of receipt, etc. in the unit order of the member. It is remembered. In addition, a status indicating whether an order has been placed for each order is also recorded. When the production number used by the production number management unit 11 is allocated at a predetermined timing for the members to be accepted by these orders, the allocated production number is recorded in the corresponding record (before the allocation). The production number is not recorded in the order).

  It should be noted that the target of material procurement scheduled to be stored in the order information storage unit 17 is not limited to material procurement from outside the company, but also includes procurement from other departments in an in-house process. The status specified in the ordering information is not limited to the ordering from the outside, but indicates a status that has been completed or not yet targeted for work instructions such as processing and assembly of internal processes.

  In the production plan, if you want to check whether there are excess or deficiency in the parts used in the production plan, specify the product number from the input / output device 20 and perform the operation to create the payment plan. The unit 12 is activated. The receipt / payment plan unit 12 reads out data necessary for calculation of the receipt / payment plan corresponding to the designated product number from the production plan storage unit 15, the inventory information storage unit 16, and the order information storage unit 17, and these data are read in time series. Expanding to MRP, a payment plan as illustrated in FIG. 5 is created.

  From the production plan storage unit 15, data relating to the used quantity for each day is read for each member in the designated production number. For example, for the product code “001” of the product number “# 001” in FIG. 2, 3, 4, 3, 4, 3 are scheduled to be used on each day after October 1, The data is read out and the used quantity is recorded in the respective scheduled use date column of “scheduled use” shown in FIG.

  From the inventory information storage unit 16, data relating to the current inventory quantity is read for each member in the designated production number. For example, for the item code “001” of the product number “# 001” in FIG. 3, since there are 10 stocks in the facility code “A111”, this data is read out and “of the day” shown in FIG. Record in the “Out of stock” column. In the case where stocks exist in two or more facilities for members with the same product number, the total value of those stock quantities is recorded.

  From the order information storage unit 17, data relating to the received quantity on each day scheduled for procurement is read out for each member in the designated production number. For example, the item code “001” of the product number “# 001” in FIG. 4 corresponds to the order information of the order codes “001-01” and “001-02”. Data relating to the received quantity is read out, and the received quantity is recorded in each of the scheduled receipt date columns of “scheduled to receive” shown in FIG. It should be noted that the received quantity is preferably recorded so that it can be identified that the order is in the ordered status (in the example of FIG. 5, the quantity in parentheses is the ordered quantity).

  As described above, when the data is written in the “schedule for receipt”, “schedule for use”, and “stock remaining” on the “current day”, as shown in the example of FIG. The quantity of can be calculated automatically. As described above, when the MRP deployment for the excess and shortage of members is performed, if the production management system is based on the normal MRP management, a plan for procuring a shortage quantity is automatically added on the day when the shortage occurs. It is configured to be In the example of FIG. 5, since two shortages occur on October 4, new ordering information for accepting two members of the item code “001” is automatically created on October 4.

  However, in the present invention, since MRP expansion is performed in units of product numbers, the use schedule, the inventory, and the acceptance schedule in the production plan are linked so as not to be excessive or insufficient for each product number. Therefore, if the shortage of the plan is automatically added as described above, the quantity procured by the addition of the plan will eventually become surplus, but the parts to be received will be allocated production numbers. Therefore, in order to use it for another product number, the work of removing the product number and assigning it again occurs.

  Therefore, in the present invention, in order to prevent a shortage from occurring when there is a shortage in the remaining inventory, the acceptance schedule in the status of unordered is advanced. That is, as shown in FIG. 6, when it is detected that the remaining inventory quantity on October 4 is negative, the acceptance schedules after October 5 are searched in order. As a result, the five acceptance schedules in the status for which orders have not been placed on October 5 will be hit, so this is the day before October 4, which is the day when the remaining inventory is negative, in this example, October 4 2 for the order information of the order code “001-02” in the order information storage unit 17 in FIG. 2 corresponding to the five acceptance schedules on October 5th. To do. Regarding such an update, it is preferable to activate the warning notification unit 13 to display a screen for notifying the input / output device 20 of the plan change. If the ordering information corresponding to the next day on the day when the remaining inventory is short does not hit, the receiving schedule after the next day is searched in order until the shortage quantity in stock is reached.

  On the other hand, as shown in FIG. 7, when the acceptance schedule after October 5 is searched and the status is hit but the status is already ordered, the planned receipt date is already specified to the procurement source. Therefore, the order information cannot be automatically rewritten. Therefore, a warning notification unit 13 displays a screen or the like for notifying a warning prompting to adjust the delivery date for the five receiving schedules on October 5 which are the latest orders or to adjust the production quantity on October 4. Is activated and displayed on the input / output device 20.

  In addition, as a result of searching the acceptance schedule, when the status of the first hit is already ordered and there is an unordered status after that, there is no particular limitation as to which is prioritized. A warning about adjustment of delivery date or the like may be notified to an already-ordered item that has been hit first, or processing may be performed to advance an unordered item that has been hit later. Alternatively, both may be displayed as options, and when the user selects an item that has not been ordered, the advance processing may be performed.

  In addition, in the example of FIG. 6, it is possible to solve the shortage of inventory by advancing the schedule of receiving the first hit, but if there is not enough inventory remaining even if the planned schedule of receiving the hit is advanced, Further, the search is continued until the shortage quantity of the remaining inventory is sufficient for the order information after the next day. When the received quantity specified in the plurality of pieces of ordering information is sufficient for the shortage of the remaining inventory, the scheduled receipt date is updated for all of the ordering information.

  Conversely, if all the order information from the next day is searched, if there is not enough inventory remaining, there will be a shortage of total parts, so a new part will be ordered for the shortage. Order information is generated for (or instructing work such as processing and assembly in an in-house process) and stored in the order information storage means 17. At this stage, the status is recorded as not yet ordered. In the order information generated here, in addition to the target product number, the quantity received is more than the quantity that is insufficient on the day when the inventory is negative, and the date before the inventory is negative on the scheduled receipt date. Each day is automatically specified.

  With reference to the flowchart of FIG. 8, a flow for MPP development of a member payment plan by the payment plan management apparatus according to the present invention will be described. First, when the creation of a payment plan specifying a product number is accepted, the accepted product number is identified (S01), and for each item of the member, data related to the used quantity of the member corresponding to the product number is obtained from the production plan ( S02), data relating to the inventory quantity of the member corresponding to the production number is read from the inventory information (S03), and data relating to the received quantity of the member scheduled to be procured corresponding to the production number is read from the ordering information (S04).

  The read used quantity, inventory quantity, and received quantity are expanded to MRP according to the time series (S05), the received quantity of the next day is added to the inventory quantity on the current day, and the remaining quantity on the next day is subtracted by subtracting the used quantity. Is calculated (S06). Check whether the remaining inventory of the next day will be negative (S07). If the residual inventory does not become negative, the inventory quantity of each day and the quantity of inventory remaining until the final scheduled use date when the usage quantity is specified. The same arithmetic processing as described above is repeated (S08). If there is no day when the remaining inventory is negative until the final scheduled use date, the MRP-developed payment plan is output to a display or printer (S09).

  When a day on which the remaining inventory is negative is detected, processing according to the flow shown in the flowchart of FIG. 9 is performed. The receiving schedule is searched in order for the next day and after that the remaining inventory is negative (S10). If there is not enough inventory remaining after searching the acceptance schedule to the end (S11), a process for generating a new ordering schedule is executed (S12).

  If the acceptance schedule that will suffice for the remaining inventory is hit (S11), it is confirmed whether the status of the ordering information corresponding to the acceptance schedule has been ordered (S12). If the order has been placed, a warning prompting adjustment of delivery date for material procurement and production adjustment of the product is output to the display or printer (S13). If the status has not yet been ordered, the scheduled receipt date of the ordering information is updated to a date before the date when the remaining inventory is negative (S14). In this case as well, a notification that the scheduled date of acceptance has been updated may be output to a display or a printer.

It is a block diagram which shows an example of a structure of the payment plan management apparatus concerning this invention. It is a figure which shows an example of the manufacturing plan memory | storage part in the payment plan management apparatus concerning this invention. It is a figure which shows an example of the inventory information memory | storage part in the payment plan management apparatus concerning this invention. It is a figure which shows an example of the order information storage part in the payment plan management apparatus concerning this invention. It is a figure which shows the 1st example which carried out MPP expansion | deployment of the member payment plan in the payment plan management apparatus concerning this invention. It is a figure which shows the 2nd example which carried out MPP expansion | deployment of the member payment plan in the payment plan management apparatus concerning this invention. It is a figure which shows the 3rd example which carried out MPP expansion | deployment of the member payment plan in the payment plan management apparatus concerning this invention. It is the flowchart which showed the flow which carries out MPP expansion | deployment of the member payment plan by the payment plan management apparatus concerning this invention. It is the flowchart which showed the flow when the shortage of members generate | occur | produces in the payment plan developed by MPP by the payment plan management apparatus concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Production management system 11 Production number management part 12 Payment / receipt plan part 13 Warning notification part 14 Configuration master memory | storage part 15 Manufacturing plan memory | storage part 16 Inventory information memory | storage part 17 Order information memory | storage part 20 Input / output device

Claims (6)

A receipt / payment plan management device for managing a receipt / payment plan for parts in a production plan,
A production plan storage means for storing the used quantity of each day member based on the production plan of the product in association with the production number;
Stock information storage means for storing the stock quantity of the member in association with the product number;
Order information storage means for storing, in association with a product number, order information in which a planned receipt date, a received quantity, and an ordered or unordered item are specified for the procurement schedule of the member;
The used quantity corresponding to one production number is read from the production plan storage means, the inventory quantity corresponding to the production number is read from the inventory information storage means, and the order information corresponding to the production number is read from the order information storage means, respectively. A payment plan calculation means for calculating an excess or deficiency of the quantity of the member in the production number with respect to the used quantity on each day according to a time series from the received quantity included in the inventory quantity and the ordering information;
When a date when the quantity of the member is insufficient is detected by the receipt / payment plan calculation means, the purchase date is searched in order of the receipt date in the time series in which the planned receipt date is specified as the next day or later. Order information identifying means for identifying order information with a received quantity that is sufficient for the quantity;
Order information update means for updating the scheduled receipt date specified in the order information to a date before the date when the members are insufficient when the order information specified by the order information specifying means is specified as not yet ordered. ,
A payment plan management apparatus comprising: If the order information specified by the order information specifying means specifies that the order has been completed, a delivery date for causing the output device to output a warning indicating that it is necessary to adjust the delivery date of the order based on the order information or the production adjustment of the product 2. The payment plan management apparatus according to claim 1, further comprising an adjustment warning unit. Even if all the order information corresponding to the product number is searched by the order information specifying unit, if the received quantity is insufficient for the shortage quantity, new order information in which the accepted quantity sufficient for the shortage quantity is designated. 3. The payment plan management apparatus according to claim 1, further comprising: order information generating means for generating the order information and storing the order information in the order information storage means. Manufacturing plan storage means for storing the usage quantity of each member used on the basis of the production plan of the product in association with the production number, inventory information storage means for storing the inventory quantity of the member in association with the production number, and In a production plan, which is executed by a computer comprising ordering information storage means for storing the ordering information in which the planned receiving date, the received quantity, and whether ordered or not ordered are specified in association with the product number A method for managing a payment plan for managing a payment plan for parts,
The computer uses the production plan storage means for the quantity used corresponding to one production number, the inventory information storage means for the inventory quantity corresponding to the production number, and the order information storage means for the order information corresponding to the production number. A payment plan calculation step for calculating the excess and deficiency of the number of members in the production number with respect to the used quantity on each day according to a time series from the inventory quantity and the received quantity included in the ordering information;
When the computer detects a date on which the quantity of the member is insufficient in the receipt / payment plan calculation step, the computer searches for order information in which the planned receipt date is specified as the next day or later in the time series of the planned receipt date, and the shortage An order information identifying step for identifying order information with a received quantity sufficient for a shortage quantity on
If the computer specifies that the order has not been received in the ordering information specified in the ordering information specifying step, the order for updating the scheduled receipt date specified in the ordering information to a date before the date when the member is insufficient An information update step;
A method for managing a payment plan, characterized by comprising: When the ordering information specified in the ordering information specifying step is designated as already ordered, the computer outputs a warning indicating that an order delivery time adjustment or a product production adjustment based on the ordering information is necessary 5. The method for managing a payment plan according to claim 4, further comprising a delivery date adjustment warning step to be outputted to the customer. Even if the computer retrieves all the order information corresponding to the product number in the order information specifying step, if the received quantity is insufficient for the shortage quantity, the received quantity sufficient for the shortage quantity is designated. 6. The payment plan management method according to claim 4, further comprising an order information generation step of generating new order information and storing the order information in said order information storage means.