Question: Define Critical path, Slack time, Resource Leveling and Dummy activity with reference to PERT and CPM. An architect has been awarded a contract to prepare

Define "Critical path", "Slack time", "Resource Leveling" and "Dummy activity" with reference to PERT and CPM. An architect has been awarded a contract to prepare plans for an urban renewal project. The job consists of the following activities and their estimated value. Draw a critical path arrow diagram for this project, indicate the critical path and calculate the total slack and free slack for each activity.

Job	Description	Predecessor	Expected time in days
A	Prepare preliminary sketches	NA	2
B	Outline specifications	NA	1
C	Prepare drawings	A	3
D	Write specifications	A B	2
E	Run prints	C D	1
F	Have specifications printed	B D	3
G	Assemble bid package	E F	1

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