Defining mutually exclusive effectivity ranges

If you intend to define occurrences as mutually exclusive, manually check that they do not have overlapping effectivity ranges. For example, in the following figure, there are two different types of dynamo and it would be wrong to configure two dynamos at the same time.

Mutually exclusive effectivity ranges

When specifying effectivity, you can make the association between the occurrences clearer by using the same find number or attaching a special effectivity note to each.