Figure 2-22. - Sample equipment estimate (page 2).
When you prepare labor estimates, weigh the various factors that affect the amount of labor required to construct a project. These include weather conditions during the construction period, skill and experience of personnel who will perform the work, time allotted for completing the job, size of the crew to be used, accessibility of the site, and types of material and equipment to be used.
The production efficiency guide chart (table 2-4) lists eight elements that directly affect production. Each production element is matched with three areas for evaluation. Each element contains two or more foreseen conditions to select from for the job in question. Evaluate each production element at some percentage between 25 and 100 according to your analysis of the foreseen conditions. The average of the eight evaluations is the overall production efficiency percentage. Now, convert the percentage to a delay factor, using the production efficiency graph (fig. 2-14), or by the Seabee average for production (67 percent) or by the average of the eight production elements. The field or project supervisors are strongly recommended to reevaluate the various production elements and make the necessary adjustments to man-day figures based on actual conditions at the jobsite.
In reading the graph, note that the production elements have been computed into percentages of production efficiency, which are indicated at the bottom of the graph. First, place a straightedge so that it extends up vertically from the desired percentage,Continue Reading