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Software EstimationWhat is an “Estimate” ?
Wildan [email protected]
http://workshop.openthinklabs.com
#1
It is very difficult to make a vigorous, plausible, and job-risking defense of an estimate that is derived by no quantitative method, supported by little data, and certified chiefly by the hunches of the managers.—Fred Brooks
What Is an "Estimate"?
A tentative evaluation or rough calculation.
A preliminary calculation of the cost of a project
A judgment based upon one's impressions; opinion
…....asking for a commitment or for a plan to meet a target
Estimates, Targets, and Commitments
A target is a statement of a desirable business objective
"We need to have Version 2.1 ready to demonstrate at a trade show in May."
"These functions need to be completed by July 1 so that we'll be in compliance with government regulations."
A commitment is a promise to deliver defined functionality at a specific level of quality by a certain date
Distinguish between estimates, targets, and commitments.
Relationship Between Estimates and Plans
Estimation should be treated as an unbiased, analytical process
Planning should be treated as a biased, goal-seeking process
Diajarna Ngareu-yeuh .. :)
