JP2006309572A - Production shipping plan preparation system and method for steel products - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the production shipping plan preparation system and method of steel products for preparing a precise plan from production allocation to shipping, and for improving the productivity of products. <P>SOLUTION: This production shipping plan preparation system of steel products for shipping products manufactured by a steel manufacturing facility having one or more manufacturing lines corresponding to models is provided with: an expected plan preparing means for calculating a difference between the total of sales prices to be calculated from the shipping quantity of products and the total of the fluctuating costs of the processing quantity of products required for shipping products for each of two or more expected production shipping plans prepared from an expected order, and for selecting the plan whose difference is the maximum; a plan preparing means for rewriting the expected order of the plan with the actual order, and for preparing a first production shipping plan for grasping the maximum operating capability of each manufacturing facility and a second production shipping plan for grasping the term of delivery of products to be manufactured by each manufacturing facility; and a plan deciding means for shipping products based on data obtained by matching the date of shipping and the term of delivery of products to be acquired from each plan. <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 an ironworks having a plurality of manufacturing processes.

Conventionally, when manufacturing steel products, the restrictions on production lots in the steelmaking and casting processes, which are the upper processes, have been very strict. 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 that considers steelmaking and hot-rolling process restrictions is implemented for an order group for one week, and the result is produced in the lower process. An interactive scheduling system that is linked to a plan is disclosed.
Further, in Patent Document 2, an upper process for processing a group of production plans created in the retrospective plan creation process based on the first assortment constraint to create a rough production plan for the production lot of the upper process. The rough production process and the production order created in this coarse production process are processed based on the second assortment, and the production lot of the production process is refined. A method for creating a production plan for a steel intermediate product having an upper process fine planning process for creating a 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.
And in patent document 2, the restriction condition at the time of creating a retroactive plan is fixed to one type, and the accuracy of the retroactive plan that has been created 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.
Furthermore, in Patent Documents 1 to 3, since the production plan is created based on the delivery date of the product, for example, in the manufacturing apparatus of each manufacturing process, for example, the restriction condition at the time of switching between product types, operation shift, Alternatively, downtime other than repair may occur, and a production plan in which the operating rate of the manufacturing apparatus is sufficiently increased cannot be created. Here, even if the production plan is recreated, the production plan is created based on the delivery date of the product, so there is no freedom in creating the production plan, and a precise production plan that can improve the operating rate of the manufacturing equipment It cannot be created, and the product productivity deteriorates.

The present invention has been made in view of such circumstances. A production / shipment plan creation system and a production / shipment plan creation method for a steel product capable of creating a detailed plan from production recording to shipment and improving product productivity. The purpose is to provide.

A production / shipment plan creation system for steel products according to the first invention that meets the above-mentioned object is a production / shipment plan creation for steel products for shipping products produced by a steel production facility having one or more production lines depending on the product type. In the system,
Based on the prospective order of the product, create multiple prospective production shipment plans from the delivery date to the production of the product, and for each of these produced prospective production shipment plans, from the shipment quantity of the product within a predetermined set period Calculate the difference between the total sales price to be calculated and the total of the variable costs for the processing amount of the product within the set period required until the product can be shipped, and select the expected production shipment plan that maximizes the difference Prospect planning means,
A first production / shipment plan capable of replacing the prospective order of the prospective production / shipment plan selected by the prospective plan creation means with an actual order and grasping the maximum operating capacity of a plurality of manufacturing apparatuses constituting the production line; A plan creation means for creating a second production shipment plan capable of grasping a delivery date of a product manufactured by each manufacturing apparatus;
And a plan deciding means for shipping the product based on production shipment plan data in which the delivery date of the product set in advance and the shipment date of the product obtained from the first and second production shipment plans are matched.

In the production and shipping plan creation system for steel products according to the first invention, if the delivery date of the product preset by the plan decision means does not match the delivery date, the plan creation means It is preferable to create new first and second production / shipment plans by changing the delivery date, and to reconcil with the preset delivery date of the product by the plan determination means.

In the production and shipping plan creation system for steel products according to the first aspect of the present invention, it is preferable that the preset delivery date of the product is determined using an operating rate of each manufacturing apparatus and a delivery date of the product of the actual order. .

In the production and shipping plan creation system for steel products according to the first invention, an equipment capacity storage unit for storing data of production amount per unit time for each product type in each manufacturing apparatus;
A facility operation storage unit that stores constraint conditions and operation shift data when switching between types in each of the manufacturing apparatuses,
A facility repair storage unit that stores data of repair and construction period and start date of each manufacturing apparatus,
The plan creation means calculates the time required to manufacture this quantity from the data of the equipment capacity storage unit and the quantity of each product type based on the actual order, and calculates the first production shipment plan. It is preferable to create and create the second production / shipment plan using the data of the equipment capacity storage unit, the equipment operation storage unit, and the equipment repair storage unit.

In the production and production plan creation system for steel products according to the first invention, the prospective production and shipment plan is a long-term monthly production plan, and the first and second production and shipment plans are short-term daily production plans. Preferably there is.

In the production and shipping plan creation system for steel products according to the first aspect of the invention, each production device constituting the production line includes an iron source production device comprising a converter and production means attached thereto, and downstream of the iron source production device. One or more processing devices are preferably arranged on the side.

The production and shipping plan creation method for steel products according to the second invention in accordance with the above object creates a plan from production to shipment of products using the production and shipment plan creation system for steel products according to the first invention. .

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 7 include a plurality of prospective production shipments created based on a prospective order by a prospective plan creation means. For each plan, the difference between the sum of the sales price of the products and the sum of the variable costs of the processing amount is calculated, so that it is possible to select a prospective production shipment plan that can obtain higher profits than before. In addition, based on the selected prospective production shipment plan, the first production shipment plan based on the maximum operating capacity of each manufacturing device and the second production shipment plan based on the delivery date of the product are selected by the plan creation means. Since each is created, it is possible to expand the selection range of the production / shipment plan that can obtain higher profits than before. Then, the plan decision means matches the delivery date of the product with the shipment date of the product obtained from the created first and second production shipment plans, so that the delivery date of the product is satisfied, and each product manufacturing apparatus A production shipment plan that can improve the operation rate can be created.
As described above, since the prospective plan creation means, the plan creation means, and the plan determination means are provided, it is possible to create a detailed plan from production recording to shipment, and to improve the productivity of the product.

In particular, the production / shipment plan creation system for steel products according to claim 2 may be implemented by changing the delivery date of the product when the preset delivery date of the product does not match the shipment date of the first and second production / shipment plans. Since the first and second production / shipment plans are created and reconciled, a more precise and precise plan can be created.

Further, the production / shipment plan creation system for steel products according to claim 3 determines the delivery date of the preset product by using the operating rate of each manufacturing apparatus and the delivery date of the product of the actual order, so that the situation immediately depends on the situation. A production / shipment plan corresponding to can be created.

Furthermore, since the production and shipping plan creation system for steel products according to claim 4 sets in detail each condition required for the production of the product of each manufacturing apparatus, the accuracy of the produced production and shipping plan 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 the production / shipment plan creation system for steel products according to one embodiment of the present invention, and FIG. 2 is a condition without capacity restriction created by the production / shipment plan creation system. 3 is an explanatory diagram of the daily production plan, FIG. 3 is an explanatory diagram of the daily production plan with the capacity constraint created by the production shipment plan creation system, and FIG. 4 is an arrangement of computers to which the production shipment plan creation system is applied. It is explanatory drawing of.

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 / shipment plan creation system for shipping a product manufactured at a steel manufacturing facility having one or more manufacturing lines equipped with other processing devices depending on the product type, based on a prospective order of the product Create a detailed plan from production recording to shipment by creating a short-term daily production plan based on actual orders from a long-term monthly production plan to be created (an example of a prospective production shipment plan) Thus, the productivity of the product is improved. This will be described in detail below.

As shown in FIG. 4, the production / shipment plan creation system for steel products includes a data storage means, a prospective plan creation means, a plan creation means, and a plan decision 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 unit, the prospective plan creation unit, the plan creation unit, and the plan determination unit 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 an order storage unit, an equipment capacity storage unit, an equipment operation storage unit, an equipment repair storage unit, a passing process storage unit, a lot summary storage unit for each process, a sales price storage unit, and a variable cost storage unit. ing.

The order storage unit stores order quantity, transportation conditions, and delivery date data for each type of order and each destination.
Here, the orders include a prospect (past performance) order and an actual order.
The product type means the type of the final product, and the classification level (hierarchy) differs between the monthly production plan and the daily production plan.
Variety used to create monthly production plan means, for example, hot rolled (hot rolled) coil, cold rolled (cold rolled) coil, thin plate, electromagnetic steel plate, stainless steel plate, thick plate, long bar, or section steel To do.
On the other hand, the product used for creating the daily production plan means a finer product than that of the monthly production plan, and means a product that is subdivided by the main passing process. For this reason, the varieties of daily production plans are, for example, the same hot-dip galvanized steel sheet, but different varieties due to the difference in the passing process (hot rolling or cold rolling) of the steel sheet used for the plating process, It differs depending on whether continuous annealing or box-type annealing is performed.

Note that the product production line is also determined by determining the product type.
The production line includes a plurality of production apparatuses, that is, an iron source production apparatus comprising a converter and production means for performing secondary refining and continuous casting incidental to the converter, and one or more arranged at the downstream side of the iron source production apparatus. It is comprised with the processing apparatus (For example, the apparatus which performs any 1 or 2 or more processes of hot rolling, cold rolling, annealing, and surface treatment (galvanization etc.)).
Here, the iron source manufacturing apparatus is arranged in an iron source process (also referred to as a steel making process).

The transportation conditions include, for example, domestic land transportation, domestic sea transportation, and overseas sea transportation.
Domestic land transportation includes, for example, truck transportation, and domestic sea transportation includes, for example, domestic shipping by a small ship. For such domestic product transportation, the contract delivery date shall be set to Just in time delivery (delivery on the specified date) or automatic shipment upon completion of production (to the port warehouse near the customer) according to the customer's request. Shipment or direct delivery is also possible).
As overseas shipping, there is transportation by medium-sized (maximum loading capacity is, for example, about 2,000 to 3,000 tons or less) or large-sized ships (maximum loading capacity is, for example, about 10,000 tons). The shipping by this ship is less frequently possible to enter the port than the domestic shipping (for example, about 3 to 5 times a month), and more than one product can be loaded and transported.

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 lot summary storage unit for each process is a management condition when operating the manufacturing apparatus of each process, for example, the upper limit value and the lower limit value of the thickness of the steel sheet to be rolled in the cold rolling process, and the annealing temperature in the annealing process. Data defining the upper limit value and the lower limit value is stored.

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, about two converters in the case of the iron source process, about one hot rolling in the case of the hot rolling process, about electrogalvanizing and tin plating in the case of the surface treatment process, The cost required for manufacturing is set.
Each storage unit described above constitutes a data storage unit. The data in each storage unit is stored in a database.

Based on the prospective order (past past results) of the product, the prospective plan creation means of the plan creation system prepares multiple monthly production plans from product delivery date to production, and then stores the monthly production plans selected from these To do.
When making a plurality of monthly production plans, the contract delivery date for each product type is used based on each data in the order storage unit. Note that when making a monthly production plan, most of the orders are prospective orders, but actual orders may be included.
Here, for domestic product transportation, the contract delivery date is used according to the customer's request, and for overseas product transportation, a quay work plan (berth plan: for example, Japanese Patent Application No. 2005-111241) is used. ) Use the berth date of the ship. Here, the quay work plan means a series of cargo handling work plans for deciding which ship lands on which quay, loading products, and leaving the berth.

Based on the contract delivery date, a rough production plan is drawn up from the product process (final process) of each production line to the converter in order for each product type to be shipped. The production plans are rearranged, and a plan from the converter to the product process of the production line is made based on the rearranged rough production plan. When planning this plan, each data of the order storage unit, the equipment capacity storage unit, the equipment operation storage unit, the equipment repair storage unit, and the passage process storage unit is used.
For the monthly production plan creation process, it is also possible to use software called “Production Planner” sold by Aspentech Broner.

Next, based on a plurality of monthly production plans created, it is necessary to make the total of the sales price calculated from the shipment amount of the product within a predetermined setting period (for example, one month) and the product can be shipped. The difference between the total variable costs of the product processing amount within the set period is calculated, and the monthly production plan that maximizes the difference is selected. 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 this calculation process, each data of the order storage unit, the sales price storage unit, and the variable cost storage unit is used.

The plan creation means of the plan creation system replaces the prospective order of the monthly production plan selected by the prospective plan creation means with an actual order, and creates and stores a daily production plan.
Here, when creating the daily production plan, the actual product type in the order storage unit is compared with the product type of the expected order that satisfies the contract delivery date, and the expected order of the matching part is actually Replace with an order. Based on the replaced actual order, a production plan is drawn up from the converter to the final process of the production line.
The daily production plan includes a daily production plan with no capacity constraint (an example of a first production / shipment plan) and a daily production plan with a capacity constraint (an example of a second production / shipment plan). .

As shown in FIG. 2, the daily production plan with no capacity constraints falls from the iron source process to the product process on the production line without considering each constraint condition of the equipment operation storage unit and the equipment repair storage unit, for example. A plan is created so that the maximum operating capacity of each manufacturing apparatus can be grasped. When creating this plan, this amount is produced from the data of the production volume per unit time (ton / hour) for each product type in each manufacturing device in the equipment capacity storage unit and the amount for each product type based on the actual order. The time required to do this is calculated. Thereby, the operation rate of each manufacturing apparatus can be obtained from the operating time of each manufacturing apparatus and the operating time required for manufacturing the product.
As shown in FIG. 3, the daily production plan with conditions with capacity constraints uses, for example, each constraint condition (shaded area in FIG. 3) of the equipment capacity storage unit, the equipment operation storage unit, and the equipment repair storage unit. The plan is to make it possible to grasp the delivery date of products manufactured and manufactured by each manufacturing device. When creating this daily production plan, the data in the lot summary storage unit for each process is used.
It should be noted that the aforementioned “production planner” software can also be used for the daily production plan creation process.

In the plan determination means of the plan creation system, the daily production plan data (the production shipment plan data of the production shipment plan data) in which the contract delivery date, which is the delivery date of the product set in advance, is matched with the shipment date of the product obtained from each daily production plan The product to be shipped is determined based on (example).
Here, the contract delivery date is determined using the operating rate of each manufacturing apparatus and the delivery date of the product of the actual order. In creating the contract delivery date, each data in the order storage unit and the equipment capacity storage unit is used.
When determining the product to be shipped, for example, when priority is given to the operating rate of each manufacturing apparatus, daily production plan data that is consistent with the shipment date of the product obtained from the daily production plan with no capacity constraint is stored. In addition, when giving priority to the delivery date of each product of the actual order, the daily production plan data consistent with the product shipment date obtained from the daily production plan under the condition with capacity constraint is stored.

Subsequently, a steel product production / shipment plan creation method according to an embodiment of the present invention will be described using the plan creation system described above with reference to FIG. For example, as disclosed in Patent Document 2, since the processing is substantially the same as the conventional method, the same parts will be described in a simplified manner.
First, in step 1 (ST1), monthly production plan data for creating a daily production plan is input. In addition, data obtained from the previous day's operation results or expected production is also input, and for example, the capacity error (result difference) of each manufacturing apparatus is corrected, and the remaining capacity of the manufacturing line is corrected.
This monthly production plan is created by the prospective plan creation means. Based on the order information input to the order storage unit, that is, the type and destination, the transportation conditions suitable for this condition are selected, and the product order is selected. Are compiled for each transportation condition used for product shipment.

Based on the contract delivery date of the product, using the data of the equipment capacity storage unit, equipment operation storage unit, equipment repair storage unit, and passage process storage unit, from the final process of each production line for each product type to be shipped Create a plan going back to the iron source process in order. Of the created plans, the converter production plan is used to rearrange the products for each iron source of the same steel type.
Furthermore, each data of the equipment capacity storage unit, the equipment operation storage unit, the equipment repair storage unit, and the passage process storage unit, based on the production date of each iron source type arranged in the production plan of the rearranged converter. Is used to create a plan from the converter to the final process of each production line.

In addition, when creating a plan that goes back to the iron source process in order from the final process of each production line and a plan that goes down from the converter to the final process of each production line, multiple equipment capacity patterns in the equipment capacity storage section, equipment operation storage section From the plurality of equipment operation patterns and the plurality of equipment repair patterns in the equipment repair storage unit, one piece of data is selected and used.
Thereby, the plan which considered the manufacturing capability of each manufacturing apparatus, the operation time, and the repair time can be created.
A plurality of monthly production plans created by the above method are stored by the prospective plan creation means.

Next, the throughput is calculated using the plurality of created monthly production plans.
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, the monthly production plan that maximizes the throughput is selected and stored by the prospective plan creation means.

The expected order of the monthly production plan input in this way is transmitted from, for example, the host computer 10 installed in the head office, and the actual order information from the customer (for example, product type) input to the order storage unit of the data storage means. , Destination and delivery date information).
In step 2 (ST2), a daily production plan with no capacity restriction condition and a daily production plan with a capacity restriction condition are created for the above-described monthly production schedule down schedule.
In the daily production plan with no capacity constraint, the operating rate of each manufacturing apparatus can be obtained from the operating time of each manufacturing apparatus and the operating time required for manufacturing the product. Here, if the operating rate exceeds 100%, it means that the manufacturing capability of this manufacturing apparatus is the limit (bottleneck process).

In addition, in the daily production plan under the capacity-constrained condition, it is a plan that is created using each data of the equipment operation storage unit and the equipment repair storage unit so that the delivery date of the product manufactured by each manufacturing apparatus can be grasped. Here, if the delivery date of the daily production plan is after the contract delivery date (Over flow), it means that the delivery date is not in time.
Note that, in creating any daily production plan, each data in the lot summary storage unit for each process is used.
In step 3 (ST3), the shipping date obtained from each daily production process created in step 2 is matched with the preset contract delivery date of the product.

The contract delivery date is determined by using the operating rate of each manufacturing apparatus and the delivery date of the product of the actual order.
Here, when priority is given to the operating rate of each manufacturing apparatus, that is, when the operating rate of each manufacturing apparatus is as close to 100% as possible, for example, in the daily production plan with no capacity constraint, the operating rate is 100%. The delivery date of the part exceeding the limit is adjusted, transferred to a manufacturing apparatus whose operation rate is less than 100%, and daily production plan data in which the processing amount for each product type is adjusted is stored by the plan determination means.
In addition, when giving priority to the delivery date of the product of the actual order, adjust the delivery date for each product order in the daily production plan with limited capacity, and delay the production date and time for orders with a margin in delivery date. The daily production plan data is stored by the plan determination means.

In step 4 (ST4), the contract delivery date is matched with the shipping date of the used daily production plan, and the matched daily production plan data is stored. Here, when the contract delivery date and the shipping date of the daily production plan used do not match, that is, when the shipment date does not meet the contract delivery date (for example, when the ship berthing date is the same) Then, the delivery date of the product of the actual order is changed again (adjustment of the delivery date), and in step 2, the daily production plan with no capacity constraint and the daily production plan with the capacity constraint are created again. Then, daily production plan data for all products is stored.
In step 5 (ST5), a daily production plan based on the daily production plan data is determined, and products are shipped based on this plan.

As described above, the present invention has been described with reference to one 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.
In the above embodiment, the case has been described where the estimated production shipment plan is a monthly production plan and the first and second production shipment plans are daily production plans. It is possible to create in units, and it is also possible to create the first and second production shipment plans in units of multiple days or weeks.

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 daily production plan of no capacity restrictions created with the same production shipment plan creation system. It is explanatory drawing of the daily production plan of the conditions with a capacity | capacitance created with the 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 (7)

In the production and shipping plan creation system for steel products for shipping products manufactured at a steel production facility having one or more production lines depending on the product type,
Based on the prospective order of the product, create multiple prospective production shipment plans from the delivery date to the production of the product, and for each of these produced prospective production shipment plans, from the shipment quantity of the product within a predetermined set period Calculate the difference between the total sales price to be calculated and the total of the variable costs for the processing amount of the product within the set period required until the product can be shipped, and select the expected production shipment plan that maximizes the difference Prospect planning means,
A first production / shipment plan capable of replacing the prospective order of the prospective production / shipment plan selected by the prospective plan creation means with an actual order and grasping the maximum operating capacity of a plurality of manufacturing apparatuses constituting the production line; A plan creation means for creating a second production shipment plan capable of grasping a delivery date of a product manufactured by each manufacturing apparatus;
And a plan deciding means for shipping the product based on production shipment plan data in which the delivery date of the product set in advance and the shipment date of the product obtained from the first and second production shipment plans are matched. Production and shipping planning system for steel products. 2. The production and shipping plan creation system for steel products according to claim 1, wherein when the delivery date of the product preset by the plan determination means does not match the delivery date, the delivery date of the product of the actual order by the plan creation means. The production and production plan creation system for steel products is characterized in that new first and second production and shipment plans are changed and the plan decision means reconcils with the preset delivery date of the product. . 3. The production / shipment plan creation system for steel products according to claim 1, wherein the preset delivery date of the product uses an operating rate of each manufacturing apparatus and a delivery date of the product of the actual order. A production and shipping plan creation system for steel products, characterized by In the production and shipping plan creation system for steel products according to any one of claims 1 to 3, an equipment capacity storage unit that stores data on a production amount per unit time for each product type in each manufacturing apparatus;
A facility operation storage unit that stores constraint conditions and operation shift data when switching between types in each of the manufacturing apparatuses,
A facility repair storage unit that stores data of repair and construction period and start date of each manufacturing apparatus,
The plan creation means calculates the time required to manufacture this quantity from the data of the equipment capacity storage unit and the quantity of each product type based on the actual order, and calculates the first production shipment plan. A production / shipment plan creation system for steel products, characterized in that the second production / shipment plan is created using each data of the facility capacity storage unit, the facility operation storage unit, and the facility repair storage unit . 5. The steel product production and shipment plan creation system according to claim 1, wherein the prospective production and shipment plan is a long-term monthly production plan, and the first and second production and shipment plans are short-term. A production / shipment plan creation system for steel products, characterized by a daily production plan. The production / shipment plan creation system for steel products according to any one of claims 1 to 5, wherein the plurality of manufacturing apparatuses constituting the manufacturing line include an iron source manufacturing apparatus including a converter and manufacturing means incidental thereto. A production / shipment plan creation system for steel products, wherein the production system is one or more processing devices arranged downstream of the iron source production device. A production / shipment plan creation method for steel products, wherein the production / shipment plan creation system for steel products according to any one of claims 1 to 6 is used to create a plan from product production to shipment. .

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