Given the following table of precedence relationships for a portion of a house-building project:

a. Draw a network diagram for this project and identify the critical path.
b. What assumptions may have been made in the development of the time estimates?
c. What will happen to the project if the materials needed for the frame preassembly are not available until the second day of the project? What if the materials were delayed until the tenth day?
d. Do you see any potential resource conflicts in this schedule? Will there be any incompatible tasks occurring simultaneously?

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Task Duration Estimates 4 days 3 days 2 days 3 days 8 days 4 days Immediate Predecessor(s) A. Prepare Site B. Install Rough Plumbing C. Pour Concrete Foundation D. Concrete Curing Time E. Preassemble Wall Frames F. Erect Wall Frames Concrete G. Install Roof H. Install Wiring I. Install Exterior Siding J. Install Insulation K. Hang Drywall L. Install Windows M. Paint Interior N. Paint Exterior O. Level Yard P. Landscape Yard Prepare Site Install Rough Plumbing Pour Concrete Foundation None Preassemble WF, Cure 2 days 3 days 4 days 2 days 3 days 1 day 6 days 5 days 2 days 4 days Erect Wall Frames Install Roof Install Roof Install Exterior Siding Install Insulation, Install Wiring Hang Dry Wall Install Windows Install Exterior Siding Cure Concrete Level Yard