What factors affect construction labor productivity?

Productivity factors: Management - planning quality, work availability, supervision, tool availability. Environment - weather, site access, congestion, overtime effects (diminishing returns after 40-50 hrs/week). Labor - skill level, experience, motivation, learning curve. Design - complexity, repetition, constructability. Other - change orders (disruption), acceleration (crowding), material availability. Productivity measured as work hours per unit or units per work hour. Understanding factors enables realistic scheduling and helps identify improvement opportunities.