The best approach is to dig out and eliminate problems where they were assumed not to exist.
Shigeo ShingoWhen you buy bananas all you want is the fruit not the skin, but you have to pay for the skin also. It is a waste. And you the customer should not have to pay for the waste.
Shigeo ShingoThere are four purposes of improvement: easier, better, faster, and cheaper. These four goals appear in the order of priority.
Shigeo Shingo