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 Linking Dates in Collective Orders

Use

Orders within a collective order are linked via the requirements date of the corresponding component in the superior order. The scheduling of the subordinate order is based on this requirements date.

You can choose whether the move time should be taken into account when scheduling. Move time is the time required to move a material from one work center to another. Move time is defined in the operation or in the move time matrix (see Operation Segments ). If you want this to be taken into account when scheduling a collective order, you have to maintain the move time in the corresponding operation of the subordinate order.

In the component ( General data tab page), you can define which option is used for linking the dates of the orders. In Relationships , if you

  • Enter a time unit, the system schedules without move time

If you specify a duration as well as a time unit, the subordinate order is changed accordingly. The requirements date of the component is transferred to the order finish date of the subordinate order.

  • Do not enter a time unit, then the system schedules with move time

The finish date of the last operation of the subordinate order is set to the requirements date and the move time of this operation is taken into account. In this case, the order finish date of the subordinate order and the requirements date of the component can be different, as long as a float after production has been maintained in the subordinate order.

Features

Scheduling Without Taking Move Time Into Account

The starting point for scheduling is the requirements date of the component in the superior order. All time elements in the subordinate order come before this point of time, starting with the float after production.

Scheduling Taking Move Time Into Account

In this example, a move time is maintained in operation 30 in the subordinate order.

The starting point for scheduling is the requirements date of the component in the superior order. The move time is deducted from these dates in order to calculate the scheduled finish for the subordinate order.

The float after production is added to the scheduled finish, to define the basic finish date for the subordinate order.

Note Note

Note that in this scheduling option, the superior order is linked to the subordinate order via the scheduled finish date (and not the basic finish date).

End of the note.

Determination of the Order Dates

If you have proposed an in-house production time > 0 days in the material master record, the order finish date that is calculated is always moved to 0:00 on the following workday.

Example Example

You want to directly produce a pressure regulating valve. In collective order scheduling, the system determines that the order finish date is 14:00, on August 5th. An in-house production time of one day is specified in the material master record, therefore the order finish date is set to 0:00 on August 6th.

End of the example.