In the standard system, the valid-from date in the change header is automatically valid for all the change objects that are changed with reference to this change number.

However, you can replace this date with an alternative one for some change objects (for example, BOM A, task list A, document 1). This is useful, for example, if the BOM is to be changed earlier than the task list.

• To do this, you create alternative dates, for example DE1 and DE2. Each of these alternative dates has its own valid-from date, for example DE1 - 08.12.1996 and DE2 - 15.12.1996.

• By allocating each alternative date to one or more change objects, you can make the change effective on different dates but with reference to one change number.

You can only enter an alternative date for change objects that you can maintain an object management record for.

You can currently link alternative dates to the following change objects:

• BOM

• Routing

• Document

• Material

The following graphic shows different valid-from dates for a change master record (valid-from date of the change header and two alternative dates). These different valid-from dates are allocated to different change objects.