The Ohio Preservation Society (OPS) has discovered a house once occupied by Rutherford B. Hayes, the nineteenth president of the United States (1877-1881). OPS plans to restore the building to reflect the period during which the former president lived there and eventually open it for public tours. Contractors for the restoration project will have to do the following:
a. Construct a PERT/CPM network for the renovation project faced by OPS, assuming:
i. The wall/ceiling activities, the flooring activities, and the exterior activities are listed in the order in which they are to be performed.
ii. Cleaning and repairing the walls/ceilings, removing the old carpeting, and sanding and repairing the exterior must precede any painting activity (interior or exterior).
iii. The walls/ceilings must be painted before hardwood flooring is installed, stained, and sealed.
iv. All painting (interior and exterior) must be completed before new rugs and carpet runners are installed.
v. Stripping the wallpaper, removing the old carpeting, and sanding and repairing the exterior may all commence at the same time.
b. If the estimated time of each wall/ceiling activity is two weeks, the estimated time of each flooring activity is one week, and the estimated time of each exterior activity is three weeks, prepare a Gantt chart for the restoration project.
c. What is OPS’s estimated completion time for the restoration project?