Cautions of Computerized Estimating

摘要

The old adage "garbage-in, garbage-out" is especially applicable in the field of computerized estimating. While computers have vastly improved estimating, they have also reinforced the importance of estimating steps that have existed prior to the advent of such technology. There seems to be a recent trend among those trained in the computer era to neglect traditional estimating practices. Traditional estimating steps are essential when developing any estimate whether computers are utilized or not. Without taking into consideration these practices, computers become instruments for more quickly producing inaccurate and unreliable estimates rather than enhancing the estimating profession. Among the many important steps of estimating, the following take on particular importance with respect to computerized estimating: Performance of physical site visits; Understanding of estimate database; Consideration for unique project aspects; and Review of estimates by peers. Coupled with performing the above steps, computers assist in the development of useful and valuable estimates. Performing physical site visits are important to estimate development. When combined with information, provided in specifications and drawings, site visits assure that all construction costs are included at the appropriate estimated value. Drawings and specifications are the baseline for estimate development. However, both can provide only so much information, by virtue of the limitations of depicting actual project conditions on paper medium.