Gruppenzuweiung (Option)
Groups multiple operations and performs assignment to satisfy constraints such as same start time. Operations are grouped with the Group operations command. One operation group is created per set of grouped operations. Grouped operations are assigned together with an assignment command such as the Assign manufacturing orders command or the Assign/peg orders command. The system for assigning operations together is the same system as for Time constraint MAX and Resource lock.
Inhaltsverzeichnis
Gruppierungseinstellungen
Settings for grouping can be either an order table or an operation table.
When making settings to group operations in an order table, the same string is input to “order group”. When an order group is set, an order group object is automatically generated in the order table. This is the same system as the resource groups of an order table, and the item groups of an item table.
When performing group settings in an operation table, “User specified operation group” of the operation table is set. When the “User specified operation group” is set, an operation group object is automatically generated in the operation group table.
The Group operations command references these settings, generates an operation group object, and groups the operations. The operation group object is added to the operation group table. If, for a given operation, both a “User specified operation group” and an “order group” of orders are set, the “User specified operation group” takes precedence. The code of the operation group can be customized with the “Operation group code expression” in the project settings.
As operations are not generated unless rescheduling is done, it is probably easier to perform group settings in an order table. If an “order group” setting is made in an order table, it is possible to select the processes to be grouped by setting the “Group Type” in a process table (see below).
One case in which it is necessary to use the “User specified operation group” of an operation table is when you want to execute the grouping or assign method not for individual orders or individual processes, but for the desired individual operations.
| Tabelle | Eigenschaft | Beschreibung |
|---|---|---|
| Auftrag | Gruppierungstyp | If the assignment method is determined order by order,set the group type of the orders. |
| Prozess | Gruppierungstyp | If the assignment method is determined process by process,set the group type of the processes. |
| Vorgang | Benutzerdefinierter Gruppierungstyp | If the assignment method can be set neither to order nor to process, and you wish to set it for any desired operation, set the user specified group type of the operation. |
For example, if the processes to be grouped have been determined, but the assignment method hasn’t, the group setting is done with “order group” of the order table and “group type” of the process table, and the assignment is done with “group type” of the order table. (Sample T and Sample T-2 in this example)
Gruppierungstypeinstellungen
How to assign operations that have been grouped is set in a group type table.
Zuweisungsart
| Wert | Beschreibung | Weitere Informationen |
|---|---|---|
| Keine | Keine Gruppierung | |
| Gleicher Beginn | Assigns grouped operations to 1 resource in such a manner that their production start times are all the same. | |
| Gleicher Beginn auf anderen Ressorucen | Assigns grouped operations to different resource in such a manner that their production start times are the same. |
|
| Durchgängig | Grouped operations are assigned so as to be continuous on the same main resource. If you want to prevent other operations from entering in between operations, you can do this by providing a resource group and assigning an operation group to that resource group with finite capacity. Note that sub resources cannot be made continuous. |
The time constraint is calculated based on the working time. Therefore, If the end time of operation A corresponds exactly to the end time of the shift of the previous day, and the start time of operation B corresponds exactly with the start time of the shift of the next day across non-working time, the time constraint between operations A and B is considered to be 0 seconds.
non-privileged and non-fixed operations are assigned as privileged constrained operation assignment and fixed operation constrained assignment.
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| Plugin | Any desired assignment method can be added with a plugin. For details, refer to EIIFilterCalcGroupedOperationsConstraint in the PlugIn Training EII VC.pdf file of the COM SDK.
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Zuweisung an Ressourcengruppe
If this setting is set to “Yes”, you can assign operation groups to resource groups. By assigning an operation group to a resource group with finite capacity, the working times of the members of a specific resource group can be used exclusively. Examples are provided for sample T and sample T-2.
When an operation group is assigned to a resource group, the following settings are required.
- Resources are set in the resource table.
- Set the “resource type” of the resource group to “Operation group”. When the “resource type” of the resource group is set to “Operation group”, the working time is constructed according to the setting of the calendar table, making it possible to assign operation groups.
Further, “Resource group load” in the Load graph can now be selected as either “Load of resource group itself” or “Load of all members”. - Set the working time of the resource group in the calendar table. To change the resource group itself or the resource quantities of the resources of members of the resource group, set the respective resource quantities to “Resource group quantity” and “Resource quantity”.
Resource groups can also be specified for sub resources (Ver. 13.1 and later). Of the resources to which all the grouped operations are assigned, the resource groups for which Resource class=Operation group in the order of main resource -> sub resource are searched for and assignment is done to the resource group that is found first.
The production time of the working group will be from the earliest production start time to the latest production end time of the grouped operations. You can also add the setup time to the operation group from EIIFilterCalcCombinationSetupDuration of the COM interface.
Berücksichtigung in Planungsparametern
Grouping is done with the Group operations command. Before you run the Group operations command, you need to generate the operations. There are no specific scheduling parameter properties for executing the group operations command.
Nor are there specific scheduling parameter properties for assigning grouped operations. Grouped operations and operation groups are assigned together within each assignment command, using the same system as for Time constraint MAX and Resource lock.
Zeitbeschränkungsart GES
In “Time constraint method” of the Integrated Master, you can select GES for setting the time constraint method between the grouped operations and the respective next processes. For details see here.
Gantt-Diagramme
Selecting some of the grouped operations on the Gantt chart causes the bars of all the grouped operations to be selected. When an operation is moved, the grouped operations move while satisfying the group assignment constraints.
The members of the order group are displayed in cascade style like a Pegged Order Gantt chart.
Andere Punkte
- To enable the group assign function, you must select the “Enable group assign” check box in the project settings.
- Refer to the settings and assignment results of sample T and sample T-2.
Einschränkungen
- Group assign is an optional functionality (requires an additional purchase fee).
- Dynamic splitting (splitting of operations done by making settings in the resource table and integrated master) is not supported.
- An operation can belong only to one operation group.
- Grouped operations can be fixed and frozen to a location that does not satisfy the assignment method of the group type.
- In that case, the operation group may be assigned by ignoring the assignment position of some of the operations.
- For example, if the assignment method of the group type is to time fix to locations where the production start times of operations differ although same start time has been set, the operations whose production start time is not the earliest are ignored. In other words, the working time of the operation group does not extend to the assignment position of operations whose production start time is not the earliest.
- The light blue underlines that indicate the range that is free of time constraint violations, which are drawn when operations are moved, are drawn separately for each operation.
- When assignment is done to dummy resources, grouped operations ignore the “Assignment Method” setting of the group type.
- When assignment is done by forcible assignment with adjustment commands, the grouped operations ignore the “Assign Method” setting of the group type.
