JPH06187014A - Work scheduling method and device by process classifications - Google Patents

Abstract

PURPOSE:To improve producing efficiency by preventing the increase of the number of works in each process, thereby shortening a period required for production in the scheduling of a work start (input of products to the process) instruction in the plural processes. CONSTITUTION:A work start date and end date in a first process and the work start date in the second process are searched (step X1-X4), and the number of waiting days until the work start date in a second process obtained by subtracting the work end date in the first process from the work start date in the second process is compared with the preliminarily set number of permitted waiting days (step X5 and X6). When the number of waiting days is beyond the number of permitted waiting days, the work start date in the first process is delayed only by the difference (step X7). When the number of waiting days is less than the number of permitted waiting days, the work end date in the second process is calculated (step X8). Afterwards, the same operation is repeated in the following process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step-by-step work scheduling apparatus and method for scheduling work start (product introduction to a step) instructions in a plurality of steps.

[0002]

2. Description of the Related Art Conventionally, in this type of process-based work scheduling apparatus, when instructing each process in operation according to a production schedule based on an already processed order form to start production work of a product of a new order form , Order information indicating the type and quantity of products in the new order form is continuously allocated from the first process to the production capacity of each process, and the day when there is a margin in the production capacity at each process is searched for on that day. Was set as the work start date (work start time).

FIG. 3 shows a conceptual diagram of a conventional process-based work scheduling apparatus. As shown in the figure, the work start date of each process includes an order information input 1 indicating the type and number of products, and a production capacity input 2 indicating the production capacity (pieces / day or pieces / hour) of each step. , Work period for each process (processing time)
The display 5 is configured to be sequentially calculated by the calculation process 4 based on the construction period input 3 indicating.

Next, the arithmetic processing 4 described above will be described with reference to the flowchart of FIG. First, when the order information of the new order form is input, the work start allocation start date of the first process is set to today's A (step Y1).

Next, from today A, order information is allocated to the production capacity frame (processing capacity per day) of the first process, and the day when the production capacity of the first process has a margin is the work start date B.
(Step Y2).

[0006] Then, the work start date B in the obtained first process
The work completion date C of the first process is calculated by adding the construction period of the first process to (step Y3).

Next, from the work completion date C of the first process, the order information is sequentially assigned to the production capacity frame of the second process, and the day when the production capacity of the second process has a margin starts the work of the second process. Search for day D (step Y4).

Then, the work start date D in the second process is added to the calculated work start date D in the second process to calculate the work completion date F in the second process (step Y5).

Next, from the work completion date F in the second process, the order sheet is allocated to the production capacity frame of the third process, and the work in the third process is started on the day when the production capacity of the third process has a margin. The date is G (step Y6), and the work start date G in the third process is added to the construction period of the third process to finish the work in the third process I.
Is calculated (step Y7).

In this manner, the arithmetic processing is successively performed for each process to calculate the work completion date Y in the final N-th process (step Y (M-1)). Then, based on the work completion date Y in the N-th process, a response delivery date (scheduled date when the product can be stored) Z is calculated (step Y).
(M)), display.

[0011]

By the way, in a process having a smaller production capacity than other processes, a large number of products wait for the start (working) of work, and the production does not proceed smoothly. This happens because the work start instruction in the process before that process is early, and as a result from the day when the product is completed, as a result, the work start may be instructed earlier than necessary in the first process. . Therefore, if the quantity in process increases in the process,
Since the period required for production is long, the production efficiency is poor, and the interest burden for maintaining the materials necessary for product production increases.

The present invention has been made in order to solve such a problem, and it is a process capable of shortening the production period and improving the production efficiency by preventing the increase of the quantity in process in each process. The purpose is to provide a work scheduling method.

Another object of the present invention is to provide a process-based work scheduling device which can easily obtain a work start date in each process without increasing the quantity in process even if the order information is changed. And

[0014]

A process-specific work scheduling method according to claim 1 of the present invention shows order information indicating the type and quantity of products, and the product-specific work period and production capacity margin of each process in operation. When obtaining the work start date and work completion date for each consecutive process based on the input information, after obtaining the work start date in the next process, the work completion date in the previous process from the work start date in this next process Subtract the days to obtain the number of waiting days until the work start date in the next process, compare this number of waiting days with the preset allowable number of waiting days, and if the number of waiting days exceeds the number of allowable waiting days in the previous process, The work start date of is delayed by the difference between the number of waiting days and the number of allowable waiting days, and the work completion date in the previous process and the work start date in the next process are recalculated, and then the work completion date in the next process is calculated. The number of waiting days is the above If it is less Chi days is to calculate the work completion date for the next step.

According to a second aspect of the present invention, there is provided a storage unit for storing order information indicating the type and number of products, a production capacity of each operating process, and a product-specific work schedule. Based on the input information indicating the input information and the allowable waiting days to start the work, the order information read from the storage unit, the input information input by the input unit, and the allowable waiting days to start the work. A processing unit that sequentially obtains the work start date and work completion date of each process is provided, and the work unit starts the product work for each successive process based on the order information, the input information, and the delay days instruction information. Date and work completion date calculation part, and after the work start date and work completion date calculation part obtain the work start date in the next process, The waiting day number calculation unit that calculates the number of waiting days by subtracting the work completion date in the previous process from the start date, the number of waiting days calculated by this waiting day number calculation unit, and the allowable number of waiting days input in the input unit The number of waiting days comparison unit for comparing and outputting the delay days instruction information according to the comparison difference to the work start date and completion date calculation unit.

[0016]

In the work scheduling method according to the first aspect of the present invention, the order information indicating the type and quantity of the product and the input information indicating the work period and the production capacity for each product in each operating process are sequentially input. When calculating the work start date and work completion date for each successive process, after calculating the work start date in the next process, subtract the work completion date in the previous process from the work start date in this next process Obtain the number of waiting days until the work start date in the process, compare this waiting day number with the preset allowable waiting day number, and if the waiting day number exceeds the allowable waiting day number, set the work starting date in the previous process as above. The difference between the number of waiting days and the allowable number of waiting days is delayed to recalculate the work completion date in the previous process and the work start date in the next process, and then the work completion date in the next process is calculated. Less than or equal to the number of waiting days By calculating the work completion date for the next step in the case, the work start waiting days in each step is determined so as not to exceed the allowable waiting days, work-in-progress quantity in each process is reduced.

In the process-specific work scheduling apparatus according to the second aspect of the present invention, the order information indicating the type and the number of products is stored in the storage unit, and the input information indicating the production capacity of each process and the product-specific work period is stored. Enter the allowable number of days to wait for the work to start in the input section. Furthermore, in the processing unit,
The work start date and work completion date calculation unit calculates the work start date and work completion date of the product for each successive process based on the order information, the input information, and the delay days instruction information, and starts the work in the next process. After the day is obtained, the waiting day number calculation unit calculates the waiting day number by subtracting the work completion date of the previous process from the work start date of the next process. Then, the number of waiting days comparison unit compares the number of waiting days calculated by the number of waiting days calculating unit with the allowable number of waiting days input to the input unit, and the delayed number of days instruction information corresponding to the comparison difference is used for the work. Output to the start date and work completion date calculation unit.

[0018]

【Example】

Example 1. 1 is a conceptual diagram of Embodiment 1 of the present invention. As shown in the figure, the work start date in each process is shown in FIG.
Based on the same order information input 1, production capacity input 2 for each process, product-specific work period input 3 for each process, and allowable waiting days input 6 newly added here, the calculation process 4A sequentially calculates and displays. 5 is performed.

In the arithmetic processing 4A at that time, the number of waiting days until the start of work in each process is calculated (waiting day number calculation 7), and this waiting day number is compared with the allowable waiting day number input 6 (waiting day number comparison 8 ), And based on the comparison result, the work start date in each process should be less than the allowable waiting days.

FIG. 2 shows a block diagram based on the above concept. In the figure, 11 is a storage unit such as a file in which order information is stored, 12 is an input unit such as a keyboard for inputting the production capacity of each process and the construction period for each product and the allowable waiting days in each process, and 13 is A processing unit that sequentially obtains a work start date and a work completion date in each process based on the information of the file 11 and the input unit 12, and a display unit 14 that displays and outputs the processing result of the processing unit 13.

The processing unit 13 calculates the work start date and the work completion date in each process successively and the work start date and work completion date calculation unit 13a, and the number of waiting days until the work start date in each process. The calculated waiting days calculation unit 13b compares the calculated waiting days with the allowable waiting days input from the input unit 12, and outputs the work start date delay instruction information to the work start date and work completion date calculation unit 13a. Waiting day comparison section 13
with c and.

Next, the operation of the processing section will be described with reference to the flowchart of FIG. When the order information of the order form is input from the order information storage unit 11, the work start date and work completion date calculation unit 13a sets the work start frame allocation start date of the first process to today A (step X1). From today's A, the order information is allocated to the production capacity frame (processing capacity per day) of the first process, and the day when the production capacity of the first process has a margin is the work start date B in the first process ( Step X
2).

Subsequently, the work start date and work completion date calculation unit 13a calculates the work completion date C in the first process by adding the work period of the first process to the work start date B in the first process obtained. Yes (step X3).

Subsequently, the work start date and work completion date calculation unit 13b assigns the order information to the production capacity frame of the second process from the work completion date C of the first process, and determines the production capacity of the second process. A day with a margin is set as a work start date D in the second process (step X4).

Next, the waiting day number calculating unit 13b calculates the number of waiting days for starting work E = D-C in the second step (step X5).

The waiting day number comparing unit 13c compares whether or not the work start waiting day number E in the second step is larger than the allowable waiting day number T1 of the second step inputted by the input section 12, and the second step. If the number E of waiting days until the work start date D in E is larger than the allowable number of waiting days T1, the difference (E−T
1) is output as delay instruction information to the work start date and work completion date calculation unit 13a (step X6).

The work start date and work completion date 13a are the work start date B in the first process (E-
T1) The date delayed by 1 minute is newly set as the work start frame allocation start date A in the first process, and the work start date B in the first process is again set.
Is calculated (step X1).

In this way, steps X2 to X7 are repeated, and in step X6, as a result of comparison in the waiting day number comparing unit 13c, if the work start waiting day E in the second process becomes smaller than the allowable waiting day number T1, Waiting days comparison section 1
From 3c, the delay days instruction information indicating that the delay days is 0 is output to the work start date and work completion date calculation unit 13a.

Work start date and work completion date calculation unit 13a
Receives the delay days instruction information and calculates the work completion date in the second process by adding the construction period of the second process to the work start date D in the second process (step X8).

Also in the subsequent processes, when the number of waiting days exceeds the allowable number of waiting days, the work start date of the immediately preceding process is delayed to reduce the number of waiting days to less than the allowable number of waiting days until the final Nth process. Then, the work completion date Y in the Nth process is calculated (steps X (M-2) to M). Then, based on the work completion date Y in the N-th process, an answer delivery date (scheduled date when the product can be stored) Z is calculated (step X (M)), and this is displayed on the display unit 14.

[0031]

As described above, according to the step-by-step work scheduling method of the present invention, when the work start date and the work completion date are obtained for each successive operating step,
Work in the previous process when the number of waiting days until the work start date in the next process, which is obtained by subtracting the work completion date in the previous process from the work start date in the next process, exceeds the preset allowable waiting days Delay the start date by the difference between the number of waiting days and the number of allowable waiting days and recalculate the work completion date in the previous process and the work starting date in the next process. By calculating the work completion date of, the number of waiting days until the work start date in each process will be less than the allowable number of waiting days, so it is possible to prevent the increase of the in-process quantity in each process It is possible to shorten the time period, improve the production efficiency, and minimize the interest rate burden for maintaining the materials and materials necessary for product production.

The process-based work scheduling apparatus according to claim 2 of the present invention stores order information indicating the type and number of products in the storage unit, and the processing unit uses the work start date and work completion date calculation unit to store the order information. , The work start date and work completion date of the product are sequentially obtained for each continuously operating process based on the order information and the production capacity of each process input from the input unit and the work period for each product, and the waiting day calculation unit The work start date in the next process is subtracted from the work completion date in the previous process to calculate the number of waiting days, and the number of waiting days comparison unit calculates the number of waiting days calculated in the number of waiting days calculation unit and the tolerance input in the input unit. Even if the order information stored in the storage means is changed by comparing the number of waiting days and outputting the delay day instruction information corresponding to the comparison difference to the work start date and completion date calculation unit, An effect that the work start date does not increase-process quantity in step can be easily calculated.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of a first embodiment of the present invention.

FIG. 3 is a flow chart for explaining the operation of the first embodiment of the present invention.

FIG. 4 is a block diagram showing a conventional device.

FIG. 5 is a flowchart for explaining the operation of the conventional device.

[Explanation of symbols]

 11 File 12 Input Section 13 Processing Section 13a Work Start Date and Work Completion Date Calculation Section 13b Waiting Day Count Calculation Section 13c Waiting Day Comparison Section 14 Display Section

[Procedure amendment]

[Submission date] April 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

FIG. 4 shows a conceptual diagram of a conventional process-based work scheduling apparatus. As shown in the figure, the work start date of each process includes an order information input 1 indicating the type and number of products, and a production capacity input 2 indicating the production capacity (pieces / day or pieces / hour) of each step. , Work period for each process (processing time)
The display 5 is sequentially calculated by the arithmetic processing 4 based on the construction period input 3 indicating

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004] Next, a description will be given of a calculation process 4 described above in the flowchart of FIG. First, when the order information of the new order form is input, the work start allocation start date of the first process is set to today's A (step Y1).

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

[0018]

EXAMPLES Example 1. 1 is a conceptual diagram of Embodiment 1 of the present invention. As shown in the figure, the work start date in each step, Figure 4
Based on the same order information input 1, production capacity input 2 for each process, product-specific work period input 3 for each process, and allowable waiting days input 6 newly added here, the calculation process 4A sequentially calculates and displays. 5 is performed.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

Next, it will be described with reference to operation of the processing unit in the flowchart of FIG. When the order information of the order form is input from the order information storage unit 11, the work start date and work completion date calculation unit 13a sets the work start frame allocation start date of the first process to today A (step X1). From today's A, the order information is allocated to the production capacity frame (processing capacity per day) of the first process, and the day when the production capacity of the first process has a margin is the work start date B in the first process ( Step X
2).

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (2)

[Claims] 1. A work start date and a work completion date for each successive process based on order information indicating the type and quantity of products and input information indicating a product-specific work period and production capacity margin of each process in operation. When calculating the work start date in the next process, subtract the work completion date in the previous process from the work start date in the next process to obtain the number of waiting days until the work start date in the next process. If the number of waiting days exceeds the allowable number of waiting days, the work start date in the previous process is delayed by the difference between the number of waiting days and the number of allowable waiting days. Recalculate the work completion date in the process and the work start date in the next process, and then calculate the work completion date in the next process. If the number of waiting days is less than the allowable number of waiting days, work in the next process is performed. A feature characterized by calculating the completion date Scheduled work scheduling method. 2. A storage unit in which order information indicating the type and quantity of products is stored, input information indicating the production capacity of each operating process and the margin of the work period for each product, and an input for inputting the allowable waiting days for starting work. Unit, a processing unit that sequentially obtains a work start date and a work completion date of each process based on the order information read from the storage unit, the input information input by the input unit, and the allowable waiting days for the work start. In addition to the above, the processing unit calculates the work start date and the work completion date of the product for each successive process based on the order information, the input information, and the delay number instruction information After the work start date of the next process is obtained by the department and the work start date and work completion date calculation unit, the work completion date of the previous process is subtracted from the work start date of the next process to calculate the number of waiting days. Waiting to do The number-of-days calculation unit is compared with the number of waiting days calculated by the number-of-waiting-days calculation unit and the allowable number of waiting days input in the input unit, and the delay-day instruction information corresponding to the comparison difference is input to the work start date and completion. A work-scheduling device for each process, which is configured by a waiting days comparison unit that outputs to a day calculation unit.