These are common terms used in a Japanese manufacturing process.

Japanese Manufacturing Process Common Terms - Part 1

せいぞうこうていかいせき
Manufacturing Process Analysis (MPA)

ふりょうひん
NG Parts
(NG = No Good)
"NG" pronounced エンジー is common in the Japanese language when referring to something unacceptable.

こうていしゃ
Operator; A person in charge of the process

さぎょうしゃ
Operator; A person who operates the operation

さぎょうひょうじゅん
Standard Operating Procedure (SOP)