Update the network given in Figure 4-6 based on the following activity progress report submitted at the end of the fifth working day.

Activity Start Time 0-1 1 1-2 5 0-3 0 3-4 3 3-7 2 0-6 5 5-8 Finish Time 3

2 Modifications Activity duration estimate increased to four days for 5-8.

a. What is the current status of this project with respect to a sche�uled completion time of 15 days?

b. What activities must be expedited to alleviate the situation found in ( a)?

The Air Force once tried a network scheme that avoided the errors and misunderstandings of the event scheme. Essentially it was the same as the event scheme, except that every activity was given both a start and a finish event. All the connections between the finish of one activity and the start of the next activity were made by dummy arrows. Sketch the market survey network strictly according to this dis cipline, and comment on why you think the Air Force abandoned the idea. Is there anything to be learned from this exercise relative to the precedence diagramming scheme illustrated in Figure 6-11?