He is considered to be the father of the Toyota Production System, which inspired Lean Manufacturing in the U.S.[1][2] He devised the seven wastes (or muda in Japanese) as part of this system.

[3] He moved to the Toyota motor company in 1943 where he worked as a shop-floor supervisor in the engine manufacturing shop of the plant, and gradually rose through the ranks to become an executive.

Ohno's principles influenced areas outside of manufacturing, and have been extended into the service arena.

For example, the field of sales process engineering has shown how the concept of Just In Time (JIT) can improve sales, marketing, and customer service processes.

Delay, waiting or time spent in a queue with no value being added 2.