Resource Allocation and Resource Leveling - Construction Project Scheduling and Control - page 130

Activity ID Activity Description IPA Duration (Days) Laborers

A Purchase & Deliver Materials - 5 2

B Remove Old Vinyl Tile - 7 4

C Install Ceramic Tile A 3 3

D Install New Vinyl Tile A, B 5 3

E Clean Up & Inspect C, D 2 2

Do the following:

1. Draw the precedence network and perform the CPM calculations.
2. Allocate the required resources and then level them so that the sub-
contractor does not use more than six laborers at any time.
3. Find ways to improve the labor usage profile.

For the sake of simplicity, assume that any laborer can perform any task.

Solution

Figure 6.1 shows the precedence diagram for this example, and Figure 6.2
shows the bar chart and resource usage profile , or laborer usage profile.

Figure 6.1 Precedence diagram for example 6.2 (PS, project start)