Which of the following Provides the least accurate in estimating?
A.
Rough order of magnitude
B.
Budget estimate
C.
WBS estimate
D.
Definitive estimate
Explanation:
Rough Order of Magnitude (ROM) EstimateA rough order of magnitude (ROM) estimate is the least accurate estimate. ROMs are -50% to +50% accurate, or potentially even larger. ROMs are used very early in the project when there is limited information from which to develop an accurate estimate.