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You have a project with four activities as follows: Activity 1 can start immediately and has an estimated duration of one. Activity 2 can start after activity 1 is completed and has an estimated duration of four. Activity 3 can start after activity 2 is completed and has an estimated duration of five. Activity 4 can start after activity 3 is completed and has an estimated duration of five. Activity 4 can start after activity 1 is completed and must be completed when activity 3 is completed. The estimate for activity 4 is ten. What is the SHORTEST amount of time in which the project can be completed?
A 10
B 9
C 18
D 11The correct answer is D.
The two paths you have in this question are Start, 1, 2, 3, End and Start, 1, 4, End. Path Start, 1, 2, 3, End would take 1 + 4 + 5 days or 10 days to complete. Path Start, 1, 4, End would take 1 + 10 days or 11 days to complete. A trick to calculating this quickly is to carefully draw the network diagram, list all the possible paths and then determine how much time each path would take.
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