Call Us: US - +1 845 478 5244 | UK - +44 20 7193 7850 | AUS - +61 2 8005 4826

Budget, authorization, or control

Cost estimating is the practice of forecasting the cost of completing a project with a defined scope. It is the primary element of project cost management, a knowledge area that involves planning, monitoring, and controlling a project’s monetary costs. (Project cost management has been practiced since the 1950s.) The approximate total project cost, called the cost estimate, is used to authorize a project’s budget and manage its costs.

Professional estimators use defined techniques to create cost estimates that are used to assess the financial feasibility of projects, to budget for project costs, and to monitor project spending. An accurate cost estimate is critical for deciding whether to take on a project, for determining a project’s eventual scope, and for ensuring that projects remain financially feasible and avoid cost overruns.

Cost estimates are typically revised and updated as the project’s scope becomes more precise and as project risks are realized — as the Project Management Body of Knowledge (PMBOK) notes, cost estimating is an iterative process. A cost estimate may also be used to prepare a project cost baseline, which is the milestone-based point of comparison for assessing a project’s actual cost performance.