Inserting an Operation
Use
You can use this finite scheduling mode to insert an operation in an existing schedule on (or as close as possible to) the desired date , even when in the schedule for this date there is no slot, or just a slot that is too small. If necessary, the system creates a slot that is large enough by shifting the neighboring operations that lie in the planning direction onto the resource.
You can only use this scheduling mode for single-activity resourcesthat are to be finitely scheduled. For more information about finite and infinite scheduling modes and resources, see Finite and Infinite Scheduling .
Features
When inserting an operation, the system shifts the operations already scheduled on the resource in order to create a suitably large slot for the operation that has to be inserted. In this way, the sequence of operations that have already been planned remains unchanged, and operations that have already been scheduled are not rescheduled on alternative resources ( alternative modes ).
The insertion point of an operation is determined by the start time of the processing activity. As the start times of the processing activities determine the sequence of the operations on a resource, the system must position the start time of the processing activity of the operation to be inserted before the start time of the processing activity of the next operation.
The time/date on which the operation is inserted depends on the resource schedule on the desired date, and on the planning direction:
There is no operation scheduled on the desired date
In this case, the system schedules the operation to be inserted on the desired time/date. If necessary, operations that were already scheduled are shifted as follows:
When the planning direction is backwards, the operations scheduled before the desired time/date are shifted into the past.
When the planning direction is forwards, the operations scheduled after the desired time/date are shifted into the future.
An operation has already been scheduled on the desired time/date
In this case the operation to be inserted is inserted, depending on the planning direction, immediately after (when the planning direction is forwards) or immediately before (when the planning direction is backwards) the operation that has already been scheduled. If necessary, the operations that have already been scheduled are shifted, as described previously.
If the system cannot generate a sufficiently large slot, for example, because otherwise the relationships would be violated, all operations remain where they are. The operation is not inserted.
Note
If the system cannot perform scheduling or rescheduling using the scheduling mode
Insert operation
, you can schedule an operation or order at the end of the schedule using the finite strategy
add an operation
.