LF − activity duration.

LF − activity duration.

• A. Lead Time
• B. Latest Start (LS)
• C. Finish Time
• D. Cycle Time

Answer: (B)

The idea being tested is how to determine the latest time an activity can start without delaying the project finish. This is found by subtracting the activity’s duration from the latest finish time (LF). In other words, LS = LF − duration. So if the activity must finish by LF and takes a certain amount of time, starting no later than LF minus that duration keeps the schedule on track. If you start later, the finish would slip beyond LF and could delay downstream work. Lead Time is a broader measure of total time from start to finish in a process, Finish Time is simply when the activity ends, and Cycle Time is the rate of production, not a scheduling deadline.

The idea being tested is how to determine the latest time an activity can start without delaying the project finish. This is found by subtracting the activity’s duration from the latest finish time (LF). In other words, LS = LF − duration. So if the activity must finish by LF and takes a certain amount of time, starting no later than LF minus that duration keeps the schedule on track. If you start later, the finish would slip beyond LF and could delay downstream work. Lead Time is a broader measure of total time from start to finish in a process, Finish Time is simply when the activity ends, and Cycle Time is the rate of production, not a scheduling deadline.