In traditional fuzzy rule-set, for completeness, rules have to
be defined for all possible situations. Some of these rules
might be irrelevant and hence researchers tries to compress
these rules by either deleting the irrelevant rules or combine
multiple rules using “OR” and/or “AND” operators. A
special algorithm used to do such compression operation
has to be built in this case. Research done by Gegov[19] is
an example.