What is the total float of activities AC-D?

What is the total float of activities AC-D?

• A. 1 day
• B. 2 days
• C. 4 days
• D. 3 days

Answer: (C)

Total float is the amount of time an activity can be delayed without delaying the project finish. It’s found by comparing the activity’s earliest timing with its latest timing: total float = latest start minus earliest start (or latest finish minus earliest finish). To determine it, you compute ES and EF through a forward pass, then LS and LF through a backward pass from the project deadline. The difference for this activity comes out to four days, so AC-D can be delayed by up to four days without pushing the project end date back. This also means AC-D is not on the critical path. For example, if AC-D has ES = 6 and duration 4 (EF = 10), and LS = 10 and LF = 14, then total float = LS − ES = 4 days.

Total float is the amount of time an activity can be delayed without delaying the project finish. It’s found by comparing the activity’s earliest timing with its latest timing: total float = latest start minus earliest start (or latest finish minus earliest finish).

To determine it, you compute ES and EF through a forward pass, then LS and LF through a backward pass from the project deadline. The difference for this activity comes out to four days, so AC-D can be delayed by up to four days without pushing the project end date back. This also means AC-D is not on the critical path. For example, if AC-D has ES = 6 and duration 4 (EF = 10), and LS = 10 and LF = 14, then total float = LS − ES = 4 days.