Deallocation of Operations and Orders 

Use

You can use this function in the detailed scheduling planning board, in the production planning run, or automatically in Detailed Scheduling to deallocate operations or orders, in other words, to remove them from the resource schedule. You set this function, for example, if you want to specify the production dates/times of operations for important orders first, and then later schedule the operations for less important orders.

A deallocated operation has the status deallocated. It is then assigned to a specific mode, but does not utilize the resources of this mode. The system automatically adjusts dates/times or modes of deallocated operations during scheduling, for example,

·        If time relationships or pegging relationships must not be violated

·        If linking of modes exists for a scheduled operation, which is rescheduled to another mode

·        If you have set compact scheduling

Prerequisites

A deallocation chart must be defined for the DS planning board so that you can deallocate operations or orders manually using Drag&Drop in the DS planning board. You can find more information under Manual Scheduling Using Drag&Drop.

Procedure

Deallocate objects in the detailed scheduling planning board using Drag&Drop

Drag the operations or orders into the deallocation chart using Drag&Drop (see also Scheduling or Rescheduling Operations and Orders Using Drag&Drop).

The system deallocates the objects. Each selected object has - depending on the planning direction - its current start or end date/time. Operations maintain their mode assignment, with the following exception: If the deallocation chart is a resource chart, you can assign a new mode to an operation by dragging the operation to an alternative primary resource. The system adjusts the operation duration in accordance with the calendar resource of the new mode.

You can undo this function within the DS planning board.

Deallocate objects in the detailed scheduling planning board with scheduling function “deallocate”

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       1.      Select the operations or orders that you want to deallocate.

       2.       Choose Functions → Deallocate

The system deallocates the objects. Each selected object has - depending on the planning direction - its current start or end date/time. Operations maintain their mode assignment.

If you have specified in the planning board profile, for example, that only scheduled operations are displayed in a chart, the deallocated operations disappear from this chart. If you have defined a chart in the planning board profile, in which operations with the status deallocated should be displayed, the deallocated operations are displayed in this chart.

You can undo this function within the DS planning board.

Deallocate objects in the production planning run with scheduling function “deallocate”

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       1.      Specify the Deallocate function when defining the production planning run for the processing step in which the system should perform deallocation.

       2.      Specify the operations or orders that the system should deallocate in this processing step.

The system deallocates the operations or orders in the production planning run. Each selected object has – depending on the planning direction – its current start or end date/time. Operations maintain their mode assignment.

Automatically deallocate dependent operations during Detailed Scheduling

When the system schedules or reschedules an operation, other operations may be affected, for example, by time relationships or pegging relationships that must be observed. Instead of rescheduling these dependent operations so that the relationships are not violated, the system can only adjust the dates/times for these operations accordingly, and deallocate the operations. Choose Deallocate dependent operations in the detailed scheduling strategy for the scheduling submode. If no mode linkage exists, which requires a change of mode, the operations will maintain their mode assignment.

Result

You can reschedule deallocated operations or orders, that is, you can dispatch them again to resources

·        In the DS planning board manually using Drag&Drop or with the reschedule scheduling function

·        In the production planning run using the reschedule scheduling function