You change a BOM item with reference to four change master records. You have created the change master records with release keys. At the time when you determine a development status, you have only released some of the change master records.

Change number N-1 has date validity. The other change numbers have parameter effectivity with various change types. You have defined effectivity type priorities in Customizing. Change number N-1 has the lowest priority, as change numbers with parameter effectivity always have a higher priority than those with date validity.

The following table shows the effectivity types, the priority of the effectivity types, and the release key.

In this example, N-5 is the change number with the highest priority. However, N-5 was not released. N-2 is the change number with the second highest priority and it was also released. Therefore, the system refers to the change status you created with reference to N-2.