是衡量提高投入与产出之间关系的方法的英文

measurement of relative improvement in output from resource input

• 是:    Semantics
• 衡量:    weigh; measure; ju ...
• 提高:    raise; heighten; e ...
• 投入:    put into; throw in ...
• 与:    take part in; part ...
• 之间:    between; among
• 关系:    relation; filiatio ...
• 的:    4次方是 The fourth po ...
• 方法:    method; means; way ...