1. A method for rule execution in decision services, comprising: providing, by one or more processors, one or more specialized rulesets classified by decision partitions based on defined clustering predicates of decision service signatures for business rules; receiving, by one or more processors, a decision request from a client; inputting, by one or more processors, one or more parameters of the decision request to a clustering predicate based on decision service signatures to produce a decision category; determining, by one or more processors, a specialized ruleset for the decision request based on the decision category; forwarding, by one or more processors, the decision request for processing by the specialized ruleset; and returning, by one or more processors, a decision output from the specialized ruleset.