mediocre plan; commonplace policy; worthless measure
A somewhat formal or written term for a policy, plan, or measure that is unremarkable, ineffective, or poorly thought out. Often used in critical or evaluative contexts.
That mediocre plan probably won't solve the problem.
彼の提案は結局凡策に過ぎなかった。
His proposal turned out to be nothing more than a commonplace measure.