A unit representing one person working for one day is a standard measure of effort. For example, a project estimated to require 20 days of labor could be described as a 20-unit endeavor, regardless of how many individuals are assigned to it.
This metric aids in project planning, resource allocation, and cost estimation. Its consistent application allows for comparison across different projects and facilitates more accurate budgeting. While originating in manual labor contexts, it remains a useful, though potentially simplified, assessment tool across various industries.
