piecework; contract processing
Refers to manufacturing or processing work where payment is based on the quantity produced, or where a company processes materials supplied by another company for a fee.
This factory produces parts on a piecework basis.
We are negotiating to raise the piecework rate.
Compound of 賃 (ちん, 'wages') and 加工 (かこう, 'processing'). The exact historical derivation is uncertain, but the term is used in modern business and manufacturing contexts.