Our updated ruleset consists of four rules that are very repetitive in nature. It would make more sense to specify the rule just once and then parameterize it in a tabular fashion. This is effectively what decision tables allow you to do.
Before creating your decision table, you will need to delete the rules we have just defined, otherwise we will end up with two versions of the same rules within our ruleset.
When creating a decision table, you are often required to specify a list of values or a range of values that apply to a particular rule. For example, in the case of our vacation approval rule, we will need to specify the following ranges of leave duration values that we are interested in: