ARE ESTIMATORS GETTING IT RIGHT? COMPARING ACTUAL AND ESTIMATED COSTS

摘要

1. Even significant variations in individual equipment, supply, wage, and salary cost values from the actual do not render the overall estimate invalid, if the majority of the remaining cost data are sound. 2. Errors in the design represent a greater potential for an invalid estimate than do errors in the cost data. 3. Each of the potential sources for cost information presents data adequate for pre-feasibility level cost estimates, even though equipment and supply specifications may alter the actual prices paid during development and production.