also: にんねん
noun
person-year; man-year
Unit of measurement for work or resource planning, representing the amount of work one person can do in one year. Used in project management, economics, and demographics.
このプロジェクトには10人年の工数が必要です。
This project requires 10 person-years of effort.
人年法でコストを計算する。
Calculate the cost using the person-year method.
Compound of 人 (person) and 年 (year), modeled on English 'person-year' or 'man-year'. The reading じんねん uses the on'yomi of both characters; にんねん is a variant on'yomi reading.