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A discrepancy between a computed, observed, or measured value or condition and the true, specified, or theoretically correct value or condition. [D04086]

A description of how likely the final cost or duration is to be within a specified range of the estimate. To properly express estimateaccuracy, both the range and the probability of it being within that range should be stated. [D05641]

A value expressed in either dollars and/or hours, to represent the projected final costs of work when completed. The EAC is calculated as ACWP + ETC. [D00615]