經 LCamel 一提，發現英文的用詞很有趣，Verification and Validation 裡這麼解釋：
It is sometimes said that validation can be expressed by the query "Are you building the right thing?" and verification by "Are you building the thing right?" "Building the right thing" refers back to the user’s needs, while "building it right" checks that the specifications be correctly implemented by the system.
滿足需求 = validation = do the right thing.
驗證作法 = verification = do the thing right.
語言真是奇妙啊，用一句話來總結，就是「Are the do you right thing right?」