When estimating project parameters: a. estimates can only be made when estimator

Question

When estimating project parameters:
   a. estimates can only be made when estimators have access to performance data from previous projects
   b. estimates are quite accurate in the earliest stage of the project, then gradually decrease in accuracy as the project is executed
   c. estimates are about 20% accurate on high risk projects, and 10% accurate on more routine projects
   d. estimates are quite inaccurate in the earliest stages in the project, then gradually improve as the project is executed

Explanation / Answer

Option D is correct.

That is because, at the earliest stage of the project, only the partial picture (i.e. requirements) is visible. As the project progresses, modules are developed and integrated, the idea on when the project can be completed (i.e.estimated completion) becomes much more accurate. This is one of the fundamentals of the agile methodologies.

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