Final answer:
To minimize the number of validation rules on a time card, employ a conditional validation approach with preconditions that determine when specific validation rules should execute. Configuring validation rules to be contingent on specific conditions will achieve the desired outcome.
Step-by-step explanation:
To minimize the validation rules that execute against a time card and only display certain validation messages under specific circumstances, a conditional validation approach should be used. This can be done by setting up the system to check certain preconditions before executing each validation rule. If the precondition is not met, the validation rule should not run, thus reducing the number of validations that occur unnecessarily. To implement this, one can configure validation rules to be contingent on specific data entries or states of the time card. For example, if a time card entry is marked as 'finalized,' additional validations might be triggered compared to an entry that is still in a 'draft' state. Additionally, using a software platform that supports creating configurable business rules can be very helpful in achieving this customization.