Estimation is the process of finding a usable approximation of a result.
Estimation may also refer to: Estimation theory, a field in statistics, also used in signal processing Estimation statistics, a data analysis approach in frequentist statistics Estimation (project management) Approximation, finding estimates in the form of upper or lower bounds for a quantity that cannot readily be evaluated precisely Forecasting Prediction
See also Guesstimate, an informal estimate when little information is available