noun
specialist subcontract work
Used in the construction industry to refer to work contracted out to specialized trades (e.g., electrical, plumbing, scaffolding) rather than performed by the main contractor.
この現場では、電気工事は職別工事として外注している。
On this site, the electrical work is subcontracted as specialist trade work.
職別工事の見積もりを各業者から取ってください。
Please get estimates for the specialist subcontract work from each trade contractor.
Compound of 職別 (trade-specific, occupational) and 工事 (construction work). The exact historical derivation is uncertain, but the term is conventionally used in the Japanese construction industry.