noun
shift change; relief of workers; replacement of personnel
Refers to the periodic replacement of workers, such as at a shift change or when one group takes over from another. Often used in contexts like factories, security, or 24-hour operations.
工場では三時間ごとに出かわりがある。
At the factory, there is a shift change every three hours.
警備員の出かわりは午後10時です。
The security guards' shift change is at 10 p.m.
入れ替わり emphasizes the swapping or replacing of people/things, often with a sense of constant change, whereas 出かわり focuses on scheduled worker relief.
Compound of 出 (で, 'out') + 代わり (かわり, 'substitute, replacement'). The kanji 代わり indicates substitution, and 出 suggests going out or appearing, together conveying the idea of workers coming out to replace others.