2. The company intends to assign ten workers to install the footings. Assuming an 8-hour workday, what is Bill’s estimate for the number of days needed to complete this task? (Note:

an assumption here is that for each additional worker assigned to a task, the task duration decreases proportionately. This is an important assumption, since in many projects the task durations are not proportionate to the number of workers. Adding workers will not necessarily shorten task times and might even increase them.)

Bill Asher, the estimator for Melbourne Construction Company, is currently estimating the days required to install the wall footings in the foundation of a hotel building. As is common for many of the activities in construction projects, he will develop the estimate using labor productivity standards.
Architectural drawings for the hotel indicate that the square foot contact area (SFCA) for the formwork footings is 13,340 sq. ft. (1,239 m2). Installation of footings is considered “standard,” so Bill refers to a manual of labor hour standards to estimate the total labor hours required for the task. The manual indicates that for the footings specified for the hotel, the standard is 0.066 labor hours per SFCA.