important component in construction costs,the value of construction put in place per hour of work will decline as result, suggesting lower productivity
productivity at the job site
contractors and owners are often concerned with the labor activity at job sites. For this purpose, it is convenient to express labor productivity as functional units per labor hour for each type of construction task. However,even for such specific purposes, different levels of measure may be used. For example, cubic yards of construction task. However, even for such specific purposes, different levels of measure may be used. For example, cubic yards of concrete placed per hour is a lower level of measure than miles of highway paved per hour. Lower-level measures are more useful for monitoring individual activities, while higher-level measures may be more convenient for developing industry-ride standards of performance.