Discussion of 成本效益 [chéng běn xiào yì] cost benefit - Trainchinese

1 - Cost Benefit seems like a logical translation. But cost effectiveness is confusing: wouldn't this be 成本效力？In the dictionary “effectiveness“ is 效力and not 效益。thank you成本效益似乎是一种合理的翻译。然而，成本效力这一表述可能存在混淆：这难道不应译为成本效力？在词典中，“效力”一词对应的是“效力”，而非“效益”。感谢您的指正。