Use of Revision Levels
Use
In discrete production processes, assembly parts are often modified slightly, so they can be used in the manufacture of other similar products. In many cases, the company must keep both the original and modified parts in stock for production purposes. Instead of assigning a new plant number to the modified part, both parts retain the same number, but are assigned different revision levels (for example, original part = revision level "A" and modified part = revision level "B").
Features
If the modification does not affect the inspection of the part, you can use the existing inspection plan to inspect both the original and modified parts.
However, if the new part has to be inspected differently as a result of the modification, you must create a new version of the inspection plan that takes into account the revised inspection procedures. This can be done by assigning a new revision level to the existing plan and making the required changes to this new version of the inspection plan.
In this way, if an order is placed for the material with a revision level, the system automatically selects the appropriate inspection plan when a delivery of new parts is received.
Activities
With the engineering change management function, you create a change master record, in which you enter the objects to be changed (such as, material, inspection plan). A change number is assigned to the change master record.
Use the change number to make the required changes to the material in the material master and assign a revision level to the material.
Make the changes to the original inspection plan with a change number and save.
If you create an inspection lot with a revision level, the key date for selecting the inspection plan is taken from the
Valid from
date of the change number that forms the basis of the revision level (example 1).
Example
You changed characteristic 10 in an operation for the 01.03.1999 with the revision level A. You later change the same inspection characteristic with revision level B, so that it is valid on the 01.04.1999.
Inspection of Characteristic 10 |
Revision Level Used in Inspection |
|
Example 1 |
On 01.05.1999 |
Revision level at 01.04.1999 (level B) |
Example 2 |
On 01.04.1999 with revision level A |
Revision level at 01.03.1999 (level A) |
Note
When you change the inspection plan, the system creates new versions of the changed inspection plan objects (for example, inspection plan header, operation, inspection characteristic) and stores the change number and key date in these objects. The key date indicates when the changes come into effect.