Estimating using an algorithm in which parameters that represent different attributes of the project are used to calculate project effort, cost, and/or duration. Parametric estimating is usually used in top-down Estimating.(

Other Definitions

Parametric Estimating – An estimating technique that uses a statistical relationship between historical data and other variables (e.g., square footage in construction, lines of code in software development) to calculate an estimate .
(Wideman Comparative Glossary of Common Project Management Terms v2.1)

J. Jerrald Hayes
I am ex-architectural woodworker and general contractor turned IT, Business and Project Management consultant, software developer wannabe senior division triathlete and ski racer, Yankee fan and founder of, 360 Difference, and now too.
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