Valid-From Dates
Use
In the standard system, the effectivity of an object change is defined solely by the valid-from date.
The valid-from date specifies the time the change becomes effective from for all the allocated change objects. You can also define a special valid-from date (alternative date) for individual objects.
When choosing the valid-from date, you should account for the effectivity of the change objects that are to be processed with this change number.
Integration
When you change an object (for example, a bill of material) with reference to a change number, the system verifies if the object (for example, the bill of material) is effective from the valid-from date.
When you create the different change objects (without reference to a change number), the system sets different commencement dates for the effectivity, depending on the object or how you create it (for example, whether you create a material immediately or whether you schedule it).
Commencement of the validity when creating change objects (without change number)
Change object |
Commencement of effectivity |
|
BOMs |
Key date |
|
Routings |
Key date |
|
Documents |
No limitations |
|
Materials |
Create → Immediately |
No limitations |
Create → Schedule |
Key date |
|
Classification system objects |
No limitations |
|
Substances |
Key date |
|
Phases |
Key date |
|
Examples:
Object in the Classification System
There is no limitation on the valid-from date for an existing object (for example, characteristic) in the classification system.
If you create a characteristic on May 10th 1997, you can edit it with reference to a change number with a valid-from date set for January 1st 1997.
Material BOM
You create a material BOM on the key date.
If you create the material BOM on May 10th 1997, it is effective from this date. You cannot edit it with reference to a change number with a valid-from date set for January 1st 1997.
Features
Entering the Valid-From Date
You can maintain the valid-from date at various processing stages, depending on the Create function you use.
· If you are creating a simple change master record you must enter a valid-from date immediately in the change master header.
· If you are creating an engineering change request you do not have to enter a valid-from date immediately. You can still enter and check the change objects without a valid-from date. You do not have to enter a valid-from date until you want to change the engineering change request to an engineering change order.
Changing the Valid-From Date
You can change the valid-from date. In the change header, this is only possible as long as no changes to objects have been made with reference to the change number. As soon as an object has been changed, the field is no longer ready for input. In this case, you must carry out a date shift.
See also:
Date Shift for the Valid-From Date