BCGBC4007A Plan building or construction work

Develop, track and revise project timeframes

Network systems or PERT charts

Start dates
Question 1
How many days after event 1 does event 2 take place? 
A.     	2 days
B.     	3 days
C.     	4 days
D.     	Other
The correct answer is B - 3 days. Event 2 takes place 3 days after event 1.

Question 2
How many days after event 1 does event 3 take place? 
A.     	2 days
B.     	3 days
C.     	4 days
D.     	Other
The correct answer is C - 4 days. Event 3 takes place 4 days after event 1.

Question 3
How many days after event 1 does event 4 take place? 
A.     	2 days
B.     	4 days
C.     	5 days
D.     	Other
The correct answer is C - 5 days. Event 4 takes place a total of 5 days after event 1 (3 days after event 1 and a further 2 days after event 2).

Question 4
How many days after event 1 does event 5 take place, going via event 4? 
A.     	4 days
B.     	5 days
C.     	6 days
D.     	Other
The correct answer is C - 6 days. Event 5 takes place a total of 6 days after event 1 (3 days after event 1, 2 days after event 2 and another 1 day after event 4).

Question 5
How many days after event 1 does event 5 take place, going via event 2 and then directly to event 5? 
A.     	5 days
B.     	6 days
C.     	7 days
D.     	Other
The correct answer is C - 7 days. Event 5 takes place a total of 7 days after event 1 (3 days after event 1 and another 4 days after event 2).

Question 6
How many days after event 1 does event 5 take place, going via event 3? 
A.     	6 days
B.     	7 days
C.     	8 days
D.     	Other
The correct answer is A, 6 days. Event 5 takes place 6 days after event 1 (4 days after event 1 and a further 2 days after event 3).
Notice that event 5 has some differences in times because one path has a total of 
7 days and the other two paths have a total of 6 days. However, we need the full 
7 days to complete the project. This period of 7 days is known as the critical path because it is the shortest completion time possible for this job if all events are to be completed. 'Critical path' is a term that is often referred to in the construction industry.

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