Factors

• Design & specifications
• Resources
• Workers
• Management
• Environment
• Communication

Methods

• Formal:

• Informal:
• Work procedure
• Crew size

Lean construction

Learning curve

• r/s: cost per unit performed
• level of productivity
• level of motivation

Effects of various events

Big Canopy system

• Vertical climbing
• Parallel delivery:

1. Hoisting crane
2. Lift
3. Gantry crane

• Prefabrication
• Material management:

1. Precast bar code
2. Tracking
3. Real-time updating