Adjusting Validity Periods: Example 

During a rules-based availability check, the system finds an inclusive and an exclusive rule based on a rule strategy. The substitute location L1 is defined in both rules.

The following table contains the validity periods for location determination.

Rule	Rule Type	Validity Period
R1	Inclusive	01.07.03 10:00:00 – 01.09.03 12:00:00
R2	Exclusive	01.08.03 10:00:00 – 04.08.03 00:00:00

The validity period of the inclusive rule R1 determines the timeframe in which location substitution is valid.

The validity period of the exclusive rule R2 determines the timeframe in which location substitution is not valid.

The system recalculates the validity period for which location L1 is considered as a substitute location. The timeframe in which location determination is not valid (01.08.2003 10:00:00 – 04.08.2003 00:00:00) is excluded from the timeframe in which location determination is valid (01.07.2003 10:00:00 – 01.09.2003 12:00:00).

The new validity periods for location determination are as follows:

01.07.03 10:00:00 – 01.08.03 09:59:59

04.08.03 00:00:01 – 01.09.03 12:00:00

This result shows that recalculating the validity period of the substitution can lead to more than one validity period.