(Solved): do as CPM chart Using the bar-net shown in Figure 7.3 and information from the WBS given in Figure 6 ...

Using the bar-net shown in Figure $$7.3$$ and information from the WBS given in Figure $$6.3$$ for the small gas station, the original eight activities can be expanded to a set of 22 activities providing a more comprehensive scheduling framework for this project. The next step in scheduling is to assign durations to each of the activities. The scheduler must consult with field personnel and get the best estimate of the duration for each activity based on the methods selected for accomplishing the work, the resources available, and the experience the field management has in estimating productivity and time durations with these methods and resources. For instance, based on the crew size, the equipment available, and the method of placement, the field superintendent can establish how long it will take to cast the concrete footers. The superintendent will know whether the concrete is to be mixed on site or brought in using a transit mix truck. He will also know the type of forms to be used, the nature of the reinforcement to be installed, the nature of any embedments and penetrations required, and the placement and number of anchor bolts required for the building structure. The estimate of duration for a given activity is given in working days. Table $$7.2$$ gives a listing of the expanded list of activities together with estimated durations for each activity. An expanded