producing a result that is wanted : having an intended effect. of a law, rule, etc. : in use. : starting at a particular time. Source: Merriam-Webster's Learner's ...
If your email outlining a plan to reduce office paper waste resulted in a 20 percent
reduction in paper use, that means your plan was
1Successful in producing a desired or intended result:
Webster's Revised Unabridged Dictionary from 1913 still lists efficient and
1 producing or capable of producing a desired result <an
b. Producing a strong impression or response; striking: gave an