CEP Labor & Equipment Productivity Flashcards

What is 'labor productivity' in the context of construction estimating?

Answer: The quantity of work output produced per unit of labor input, typically measured in units per labor-hour

Labor productivity measures work accomplished per labor-hour, directly determining estimated durations and labor costs for a given scope.

Which factor most commonly reduces construction labor productivity on a project?

Answer: Overcrowding or stacking of multiple trades in the same work area

Trade stacking and area congestion create worker interference, reduce efficiency, and are among the most well-documented causes of productivity loss on construction projects.

What is 'crew composition' as used in construction estimating?

Answer: The mix of specific craft classifications assigned to perform a defined work task efficiently

Crew composition defines the combination of craft types—such as foreman, journeymen, and apprentices—required to efficiently perform a specific task.

What does 'production rate' mean in construction cost estimating?

Answer: The quantity of work completed per unit of time by a crew or piece of equipment

Production rate quantifies how much work—measured in units like LF, SF, or CY—a crew or machine accomplishes per hour, shift, or day.

What is the impact of the 'learning curve' on labor cost estimates for repetitive work?

Answer: Productivity improves as workers repeat the same task, reducing required labor-hours per unit over time

The learning curve effect means workers gain efficiency through task repetition, increasing hourly output and reducing per-unit labor costs as work progresses.

What is 'lost time' in construction labor productivity analysis?

Answer: Non-productive time during the paid work shift spent on activities that do not advance the work

Lost time is any portion of the paid work shift consumed by delays, waiting for materials or instructions, rework, or other non-value-adding activities.