JP2002055710A - Process chart editing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for dividing one working process, and for arranging the result as plural processes, and a means for interrupting serial working processes, and preferentially setting the other working process as a process chart editing function. SOLUTION: This system is provided with an assignment invalidating time zone detecting means 1 for detecting the process assignment invalidating time zone of a device based on process assignment attributes and already assigned processes, a unit process arrangement instructing means for designating a device and the start time, and for instructing the arrangement of unit processes in a process chart, and a process arranging means 3 for, when the time zone of the unit processes whose arrangement is instructed and the time zone of the process assignment invalidating time zone of the devices whose arrangement is instructed have their overlapped part, dividing the designated unit process, and for arranging the result in a time zone other than the process assignment invalidating time zone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for editing a process chart such as a Gantt chart often used in planning work in the field of manufacturing and distribution.

[0002]

2. Description of the Related Art For example, in a Gantt chart editing system used in the manufacturing industry, there has conventionally been a system for automatically drafting a process plan by a computer. In addition, such a system had a function of performing a manual correction to find a better solution.

For example, Japanese Patent Application Laid-Open No. 4-290162 discloses a system for creating and displaying a process plan for each device by giving various preconditions to a production process in a plant. JP-A-5-28161 "Scheduling system" includes a system for assisting in planning a process step of a similar plant when manually moving a job-unit process including a plurality of parts (process line elements). A time-direction movement function is disclosed in which when a line element of a part of interest and a process overlaps, the other party pushes away the other party and interrupts itself by movement in job units.

Japanese Unexamined Patent Publication No. Hei 9-114889 "Method of creating a process plan" discloses a method of creating a process plan for a factory that manufactures parts, in which the setup time required for human work included in each process is determined in parallel. It is disclosed that a time overlap between a plurality of steps progressing to the above is detected and a warning is issued.

[0005] As described above, the automatic planning function includes operating conditions of various devices, that is, an operation stop date due to inspection, a setup work bottleneck of an operator, an operation rate of each device, a corresponding device for each processing content, and a processing device. Processing is performed using the connectivity of the stages as input conditions, and the work process is displayed as a process for each device in a line chart or a Gantt chart in correspondence with the time axis.

As a supplement to this, by using a manual correction function, a line element of a chart corresponding to each work process is used for a part that cannot be processed in principle from a more comprehensive point of view or due to policy conditions. Move in the time axis direction, or as a work process of another device,
I changed it and edited it as a Gantt chart showing a more realistic work plan.

[0007]

However, according to the conventional manual correction function, when a line element on a Gantt chart indicating one operation step is moved, an area which cannot be allocated, that is, an area which cannot be allocated, that is, for each apparatus. In the fixed time zone, they moved so as not to cover the area on the Gantt chart that could not be newly allocated. In other words, dividing and assigning the process represented by one line element to a plurality of portions was less necessary for the above-described plant processing, and was not provided as a Gantt chart editing function. Further, when performing manual editing, it is attempted to newly set another work process or to move a line element indicating another work process during a time period overlapping with a line element of a work process already arranged. Then, a warning is issued to prohibit the warning, and when the warning is executed, the editing is performed in such a manner that a line element indicating an existing work process is moved.

[0008] As shown in the above-mentioned JP-A-5-28161 "Scheduling system", the time period (prohibition of equipment use, etc.) is considered while considering the mutual time conditions of the processing steps in the continuous processing job in the plant. It is proposed to relocate the job by jumping over the (area), but the control of each processing step is treated as a continuous line element and the temporal relationship of each part is within the time limit. .

However, as a function of manual editing, in the case of a work process that continues for a continuous time, for example, a process of continuously manufacturing a large number of mechanical parts with a certain device, the device is used to immediately When it is necessary to produce a product of the same type, when the work process in progress is interrupted and the process of another product is incorporated, the same as in the case where the above processing process cannot be divided and scheduled, the conventional Gantt The chart editing system could not process it.

In view of the above, the present invention provides a function for manually editing a Gantt chart relating to a work process which can be interrupted and restarted even though the operation is continuous, but one work process is divided into a plurality of processes. It is an object of the present invention to provide means for enabling rearrangement or means for interrupting a continuous work process and setting the other work process with priority.

[0011]

The above object is achieved by a process editing system configured as described below.

FIG. 1 is a block diagram of the present invention.

FIG. 1 shows a process chart editing system for editing a process chart which displays a continuous operation processing time zone of each apparatus as a unit process, wherein 1 denotes a process table stored in a process table storage means (not shown). Based on assignment attributes and assigned operations,
A non-assignable time zone detecting means for detecting a time zone in which the designated apparatus is incapable of process allocation, 2 is a unit process arrangement instructing means for designating an apparatus and a start time and instructing an arrangement of unit processes in a process chart. It is.

Reference numeral 3 denotes an overlapped portion between the time zone of the unit process designated by the unit process placement instructing means 2 and the time slot of the apparatus designated by the disposition which is detected by the unassignable time zone detecting means 1. When it has, it is a process allocating unit that divides a specified unit process and allocates it in a time zone other than the process allocation impossible.

When the start time designated by the unit process arrangement designating means 2 is within the time zone in which the unit process is already arranged, the unit unit 4 divides the already arranged unit process,
Interruption step arranging means for interrupting and arranging a unit step newly instructed to be arranged.

Reference numeral 6 denotes priority storage means for storing the processing priority of a product to be processed by operating the apparatus. Reference numeral 7 denotes a time slot of a unit process in which the start time instructed to be arranged is already arranged in the same apparatus. Is a priority warning means for making a determination based on the processing priority of the product stored in the priority storage means 6 and giving a warning when the priority of the product corresponding to the already arranged unit process is high.

The process chart to be edited by the process chart editing system of the present invention is stored in a process chart storage means (not shown) as a process assignment attribute and an assigned process for each device. Here, the process schedule assignment attribute is an attribute indicating at least a operable time zone for each device.
This is information for distinguishing a time zone in which the device cannot be operated due to a power failure, a driving holiday of the entire facility, a holiday of a driving staff, or the like.

The allocated process indicates that the operation of the apparatus is planned and the time period during which the apparatus is to be operated has been scheduled.
Normally, a new process cannot be arranged.

In the editing operation of the process table, the stored process table is displayed, an instruction is given on the screen to arrange the operation time zone by a continuous line element on the time axis of the designated device, and a new process is performed. To add a process, or to relocate a process that has already been arranged by moving it on the time axis of the same apparatus.

Further, as an operation which is a feature of the present invention, when there is a time zone that cannot be assigned by the above-mentioned process schedule assignment attribute, it is possible to assign a process to a period including the time zone. That is, it is possible to perform the operation of arranging the newly arranged process in the operable time zone divided by the inoperable time zone detected by the unassignable time zone detecting means 1.

Further, even when another process has already been arranged at the position where a new process is to be arranged, the interrupt process arranging means 4 can be used.
Is used, it is possible to prioritize and arrange the new process after the process of dividing the already arranged process and newly arranging the process, or by re-arranging the process in another processable device. .

Then, when the start time instructed to be arranged is within the time slot of the unit process already arranged in the same device, the judgment is made based on the processing priority of the product stored in the priority storage means 6, When the priority of the product corresponding to the already arranged unit process is high by the priority warning means 7, a warning can be issued.

In the process chart of the present invention, the object to be treated as a unit process is, as described above, a continuous repetition process for each device. Although it is necessary to set up a processing environment for continuous manufacturing and assembly at the beginning of the process, as in the case of product assembly in which parts supplied separately are assembled, the continuous repetition of fine processing generally results in production The processing of equipment, lines, and work that determines

Even if it is efficient to continuously operate such processing steps, it is necessary to create divided steps when the operation must be divided for various reasons. In addition, it may be necessary to interrupt the operation of the device in progress and reassemble the process depending on business conditions or the like.

In such a case, for the purpose of flexibly editing the target process, one means for detecting a non-allocatable time zone, and the arrangement of unit processes on the screen are displayed on the screen. Means for designating the position by specifying the position on the above, means for arranging the process by dividing the process into time periods excluding the time zone which cannot be allocated which has been detected, and means for the process already arranged 4 There is provided a means for interrupting and arranging the step of dividing at the position of the time axis and newly arranging the cells with priority.

[0026]

FIG. 2 is a block diagram showing an embodiment of the present invention. The process to be described in the following description is an operation planning process of an apparatus for performing a processing process of office equipment,
These are sequentially processed by a plurality of devices for each work stage, such as a body assembly process, a component mounting process, and an inspection process.

The operation of these devices is carried out in a time zone in which machines and personnel can be allocated by supplying separately procured and accumulated parts, so that an amount of processing corresponding to the operation time is performed. Become.

That is, the office equipment to be manufactured has a short processing time in each unit in each process, and each apparatus completes processing one by one for each of the short unit processing times. A proportional amount of processing will be performed. In addition, when switching to a new production target, an appropriate setup time such as setting and confirmation of an operating environment is required prior to the operation of the apparatus, but this embodiment is not related to the essence of the invention. It has been omitted.

In the production apparatus as described above, the processing of each process of lot production is temporarily interrupted and stopped and then resumed, or the production of another product is interrupted and processed. Can be reset and the process can be resumed.

In this embodiment, the continuous operation of the apparatus in the process editing of the operation of these apparatuses is assigned to a time zone divided according to the environment of the apparatus, that is, a time zone in which the apparatus can be operated, or the operation is already performed. 1 shows a process chart editing apparatus for interrupting a scheduled process and setting a new emergency production process.

In the present embodiment, a form realized by a computer program executed on a computer used for general purposes such as a personal computer and a workstation will be described.

The process chart editing system of the present invention is realized by executing a computer program on a computer including a processing device, a main storage device, an auxiliary storage device, an input / output device, and the like. The computer program is provided by being stored in a portable medium such as a floppy (registered trademark) disk or a CD-ROM, or in a main storage device or an auxiliary storage device of another computer connected to a network. The recording medium of the present invention corresponds to the portable medium, the main storage device, and the auxiliary storage device.

The provided computer program is loaded directly from the portable medium to the main storage device of the computer, or once copied or installed from the portable medium to the auxiliary storage device, and then loaded and executed in the main storage device. Also, when provided by being stored in another device connected to a network, it is also copied to an auxiliary storage device, loaded into a main storage device, and executed after receiving from another device via a network.

FIG. 2 shows a control unit 2 of a computer on which a program for realizing each function of the process chart editing system operates.
3. Process table storage unit 24 for storing the process table, display unit 21 and operation unit 2 for the user to edit the process table
2 is shown as a configuration.

In the control unit, a computer program constitutes the following units corresponding to each function of the process chart editing system.

The non-allocatable time zone detecting unit includes, as process allocation attributes stored in the process table storage unit for each device, a operable time zone, an unusable time zone, and a time zone of an already allocated process. Based on this, a time zone in which a new process cannot be allocated is detected.

The unit process arrangement instructing unit is necessary for a unit process of a process for planning a new operation which is separately input and stored, that is, a process determined by a type of process of a certain product, for example, component mounting, and a production quantity. A continuous operation processing step indicated by time is shown as a line element on the screen, and this is displayed on the appropriate time axis by an appropriate device of the process chart displayed by the user using a mouse provided as an operation unit. A new unit process is positioned at the position, and the arrangement is instructed.

Further, the process arranging unit arranges the arrangement start position and the processing time of the unit process of the apparatus designated by the unit process arranging instruction unit in the process schedule, and excludes the time zone in which the process schedule cannot be allocated. It is arranged in the time zone.

The interruption step arrangement unit designates a position on the time axis of the time zone of the already arranged step, interrupts the processing, and arranges a new unit step in the apparatus.

FIG. 3 is a diagram (part 1) for explaining the process table editing. Thus, the format of the process chart to be edited on the screen, the process of newly allocating the already allocated processes and the process of newly allocating the unallocated processes, and the allocated results will be described.

In FIG. 3 (a), the process chart shows the apparatuses A, B,
The device C, the name of the process to be assigned to each device, and the time period during which the process is operated are displayed as line elements along the time axis. For example, a line element indicates that the process of assembling 01 indicating the body assembling process of the office equipment is to be operated from the first day to the second day on the time axis indicating the day as a unit. Similarly, the third day is assigned to the process of the assembly B (component mounting process) of the device B.

Unallocated processing to be newly allocated, assembly 03
The process of (inspection process) is separately input and stored, and is displayed as an unallocated process by a line element representing the number of hours on the screen. The user designates the fourth day on the time axis of the apparatus C as an apparatus capable of assembling 03 processing, and moves and arranges the line elements so as to plan the operation for four days to seven days. Represents.

However, since the fifth day is set as a day when the factory cannot be operated because the factory is closed as indicated by the frame in the date, the apparatus C is continuously operated from the fourth to the seventh day.
Can not drive. In other words, the unit process to be newly arranged and the time zone (day 5) where assignment is not possible overlap. Therefore, as shown in FIG. 3B, the process is divided into time zones excluding the time zone in which assignment is impossible.

Here, the factory holiday is shown as a time period during which operation is not possible. However, when a process cannot be allocated on a device-specific basis, such as an inspection date for each device, or an assignment failure due to the absence of operating personnel for that device. Although there is also, it can be similarly edited by storing it as a process assignment attribute in the process table storage unit. Further, the cause of the non-assignment may be that there is a process already arranged. This makes it possible to create a plan for operating the process by gathering the time periods during which the apparatus is vacant.

Further, the unit process for which the arrangement is instructed is divided into two unit processes by the process dividing unit at the beginning of the time zone in which assignment is not possible. The unit process at the beginning is placed as it is,
In the latter half of the unit process, new allocation is attempted with the end point of the unallocatable time zone as the head. Here, when it overlaps with a time zone in which allocation is not possible, the latter half of the unit process is divided and arranged again as described above.

FIG. 4 is an explanatory diagram (part 2) of the process table editing. In FIG. 4A, the body assembling process is arranged in the apparatus A from the first day to the fourth day as the assembling 01 process from the first day to the fourth day. Also, it is shown that the component mounting process has already been arranged in the device B for two days from the fifth day to the sixth day after the completion of the assembly 01 process as the assembly 02 process.

At this time, as shown in FIG. 4B, the unassigned process assembly 11 and assembly 12 indicate that there is a process of a new product to be urgently processed. That is, a body assembling process performed by the device A and a component mounting process performed by the device B. The processing time requires two days or one day. The device type is stored. As shown in FIG. 4 (a), an instruction is given at the position indicated by a triangle on the third day of the assembly 01 processing step.
The process table is edited so that the unassigned assembly 11 processing steps shown in FIG. 4B and the subsequent assembly 12 processing steps are urgently arranged.

In this case, the process chart is edited as shown in FIG. First, with respect to the device A, the assembly 01 process is interrupted until the second position on the designated time axis. That is,
The first step is divided into the first two days and the second two days. In the apparatus A, an assembly 01 processing step is arranged until the second day, and an assembly 11 processing step is arranged from the third day to two days. The two-day part in the latter half of the assembling 01 processing step is rearranged from the fifth day after the assembling 11 processing is completed.

The assembly 12, which is a post-process of the assembly 11 process, is a process of operating the apparatus B, and is arranged as the operation of the apparatus B from the fifth day when the assembly 11 ends. The post-assembly 02 process of the assembly 01 process is rearranged from the seventh day after the rearrangement of the latter half of the assembly 01. As described above, when another product is produced by interrupting the continuous production process of the same product, a new setup is required when the production of the interrupted product is resumed after the interruption process. Although necessary, description has been omitted in this embodiment.

As described above, the process chart editing system of the present invention can flexibly edit a process chart for interruptible continuous processing.

The operation of editing the process table will be described below with reference to the flow chart of the configuration of the process table storage unit and the new and interrupt arrangement of processes.

FIG. 5 shows a process chart attribute table. FIG.
(A) shows the configuration of the process chart attribute. Each device A,
B and C can operate the processing type, assembly a, assembly b, and assembly c, respectively, as functions. The assembling process of the office equipment handled here is performed in the order of assembling a (body assembly), assembling b (component mounting), and assembling c (inspection). Shows the order relationship.

The location of the information on the assignment attribute in the process chart is indicated by the address of the non-assignable time zone list and the address of the assigned time zone list for each apparatus and process type.

As described above, the non-assignable time zone indicates a time zone in which the operation of the device is impossible. FIG. 5B shows an example of the information on the non-assignable time zone. The address indicates the above-mentioned non-assignable time zone list for each device. For the device A, the start time is 5 in accordance with FIG.
The day and the end time are 5 days, the reason for the non-assignment is holiday, and the 5th day indicates that the operation cannot be performed due to the holiday. Subsequently, the start time is m, the end time is n,
The reason why the assignment cannot be performed is that the equipment is periodically inspected, which is also not shown in FIG. 3, but means that the operation cannot be performed in the process schedule from the mth to the nth day due to the periodic inspection. . The reason why the addresses of the assigned time zone list are indicated is that a plurality of time zones may not be assigned to each device.

FIG. 5C similarly shows a list of allocated time zones. An example corresponding to FIG. 3A is that the operation for production of the product a (assembly 01) of the apparatus A has been allocated so that the operation is performed in a time period of one to two days. Means. In some cases, the operation time zone of the same product is divided into a plurality of processes. In such a case, the items can be stored by adding items to this list. The display of the product from day e to day f indicates that the same process of another product by the same device is operated in that time zone. The post-process of the product a is operated by the apparatus B, and as shown in FIG.
Here it is from 3rd to 3rd.

FIG. 5D shows a priority table. When arranging a new process by interrupting an operation process that has already been arranged in a certain device, prioritize interrupts to prevent operation errors, and interrupts of higher priority are performed as instructed, but priority is given When the order is reversed, this is checked and a warning is issued. In this priority table, a product having a larger number is set as a higher priority for each product to be produced. Products are set for each production unit according to the content of the contract with each customer.

FIG. 6 is an explanatory diagram showing a change in the allocated time zone of the process table attribute table due to the new process arrangement. These are illustrated corresponding to FIG. FIG. 6A shows FIG.
In correspondence with the process of each line element in (a), it is shown that the device A has been allocated to operate the product a from 1 day to 4 days, and the device B has been allocated from 5 days to 6 days. I have.

FIG. 6 (b) corresponds to FIG. 4 (b), but the process of newly allocating will be performed until the user specifies which device and which time is to be the starting point. Since it is not determined, the attributes have only the type of processing (whether the processing is body assembly or component mounting) and the number of processing times. Here, the assembly a for the product b and the assembly b for the product b are in a state of waiting for a step requiring a processing time of two days and one day, respectively.

FIG. 6 (c) corresponds to FIG. 4 (c), and shows the allocated time zone after the interrupt arrangement. As illustrated, the list of the same device is arranged in the order of time. This will be described later, but is necessary when examining the overlap with the assigned time zone, and is a natural arrangement.

FIGS. 7 and 8 show flowcharts (1) and (2) of the process arrangement. Here is the user
As shown in FIG. 3B and FIG. 4B, the unassigned process information having only the time length and the process type as attributes is stored on the screen as shown in FIG. 5 shows the operation of processing when a new device is newly arranged in the process chart by designating a position on a specific time axis of a specific device on the process chart displayed by [1].

First, in step S71, the information, the product name, the processing type, and the number of hours that the line element indicating the unallocated process selected by the user on the screen has as attributes are stored. Next, after the above selection, the process arrangement position designated by an operation such as mouse drag and drop is stored.

In step S72, a check is made to match the unassigned process attribute with the designated device. This is to check whether the processing type is possible with the apparatus or whether the processing is the correct combination.
Displays an error and exits.

Next, although not shown in the figure, it is possible to separately designate an interrupt arrangement or a normal arrangement.
In step S73, the state is determined and the process branches. In the case of normal allocation, that is, the operation in which the unallocated processes are sequentially allocated to the other time periods while the time period during which operation is not possible due to holidays and inspections and the time period of the already allocated processes are left as they are. Becomes

In step S74, it is determined whether the unassignable time zone and the already assigned time zone do not overlap the time zone portion of the number of hours indicated in the attribute of the unallocated process from the time when the arrangement is instructed. . Although this is not shown in detail, the list of non-assignable time zones and assigned time zones shown in FIG. 5 is arranged in chronological order, so that the presence or absence of overlap and the time of overlap can be easily understood by sequentially comparing them in chronological order. .

If there is no overlap, step S78
The process is terminated by disposing the new process at the designated position as it is. If the indicated time axis position is included in the unassignable time zone or the time zone of the assigned process (not shown), a warning is issued as an operation error, and the operation is re-executed and the process is terminated.

When it is determined that the designated time slot of the unassigned process is unassignable or overlaps with the assigned process time zone, the priority table of the product is compared to determine whether the combination is permitted to be interrupted. . When a process corresponding to a product with a low priority is to be arranged as a new process, a warning is issued. Here, as shown in FIGS. 4 and 5, the operation is explained in the case where the processing of a product with a high priority interrupts.

In step S75, the designated unallocated process is divided into the first half and the second half at the overlapping time. Then, in step S76, first, the first half is arranged at the designated position.

In step S77, the number of hours of the stored unallocated process attribute is changed to the remaining number of hours, and the process arrangement position (time) is changed to the overlapping non-allocatable time zone or the rear end of the allocated time zone. Then, it is determined again in step S74 whether or not there is any overlap in the latter half. In this way, by repeating the process until all the divided parts are arranged, the target unallocated process can be divided and arranged in a time zone other than the non-assignable time zone and the allocated time zone.

Next, step S73 is executed as an interrupt arrangement process.
The operation at the time of branching from step S81 to step S81 will be described.

First, in step S81, it is checked whether or not the allocation designation positions of the allocated process and the unallocated process overlap. If they overlap, in step S82, the assigned process is divided at the designated arrangement position, and the first half is arranged as it is. In step S83, the process of the unassigned new product is arranged from the designated position. Then, the latter half of the arranged process divided in step S84 is arranged immediately thereafter.

Next, in step S86, those that overlap the moving part of the second half that has been newly arranged and divided in another allocated step of the same apparatus are sequentially moved to a time zone other than the non-allocation time zone. In step S87, the post-process performed by another device also moves backward in a time zone other than the non-allocation time in conjunction with the movement of the previous process.

If it is determined in step S81 that the allocation designation positions of the allocated process and the unallocated process do not overlap, step S85
Then, the process of the new product is arranged at the designated arrangement position.
After that, the same processing as in the case of the overlap is performed in step S86.

As described above, in the case of the interruption arrangement, when an interruption is designated in the time zone portion of the already arranged step, the already arranged step is divided and the new step is interrupted. Thereafter, in the process on the same device as the remaining divided portion, the processes affected by these arrangements that are overlapped are sequentially shifted so as not to overlap later. Furthermore, by interlocking the adjustment of the relationship between the pre-process and the post-process in the production flow of the same product, the interrupt arrangement is completed.

[0074]

As is apparent from the above description, according to the present invention, a series of work processes and production processes are divided in time to schedule, especially for mass production of parts and assembly of mass production devices such as personal computers. Or to interrupt the series of work processes to interrupt the production process of another product, modify the plan, and realize flexible production planning,
There is an economic and industrial effect of improving productivity through effective allocation of resources and timely response.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 is an explanatory diagram of process list editing (part 1).

FIG. 4 is an explanatory diagram of process list editing (part 2)

FIG. 5: Process schedule attribute table

FIG. 6: Change in allocated time zone of process table attribute table due to new process allocation

FIG. 7 is a flowchart of a process arrangement (part 1).

FIG. 8 is a flowchart of a process arrangement (part 2).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unassignable time zone detection means 2 Unit process allocation instruction means 3 Process allocation means 4 Interruption process allocation means 6 Priority storage means 7 Priority warning means

Claims (4)

[Claims] 1. A process table editing system for editing a process table for displaying a continuous operation processing time zone for each device as a unit process, wherein the process table storage stores a process assignment attribute and an assigned process for each device. Means, based on the process assignment attribute and the assigned process stored in the process table storage means, a non-allocatable time zone detecting means for detecting a time zone in which the designated apparatus cannot allocate the process, and specifying the apparatus and the start time. A unit process arrangement instructing unit for instructing the arrangement of the unit processes in the process table; and a time zone of the unit process instructed by the unit process arrangement instructing unit and a device instructed to be arranged detected by the unassignable time zone detecting unit. A process allocating means for dividing a specified unit process and allocating the unit process in a time zone other than the process allocable when the time allocable to the process non-allocatable has an overlapping portion. Table editing system. 2. When the start time designated by the unit process placement instructing means is within the time zone in which the unit process has already been placed, the already arranged unit process is divided and the unit process newly designated by the placement is designated. 2. The process table editing system according to claim 1, further comprising an interrupt step arranging means for interrupting and arranging the step. 3. A priority storage means for storing a processing priority of a product to be processed by operating the apparatus, and when a start time designated for the arrangement is within a time zone of a unit process already arranged in the same apparatus. A priority warning means for determining based on the processing priority of the product stored in the priority storage means, and for giving a warning when the priority of the product corresponding to the arranged unit process is high, 3. The process chart editing system according to claim 2, wherein 4. A recording medium for recording a program of a process chart editing system for editing a process chart for displaying a continuous operation processing time zone for each device as a unit process, wherein the computer is provided with a process assignment attribute for each device. Process table storage means for storing allocated processes, and an allocation impossible time zone detecting means for detecting a time zone in which a designated apparatus cannot allocate a process based on the process allocation attribute and the allocated process stored in the process table storage means. The unit process arrangement instructing means for designating the arrangement of the unit process in the process table by designating the apparatus and the start time, and detecting the time zone of the unit process designated by the unit process arrangement instructing means and the unallocatable time zone detecting means. If there is an overlap with the process-assignable time zone of the specified equipment, the specified unit process is divided and assigned to a time zone other than the process-assignable time zone. Placement means, a computer-readable recording medium recording a program to function as a.