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Critical path analysis (HSC Maths Standard 2) quiz

10questions. Pick an answer and you'll see why right away.

  1. In an activity network, the minimum completion time of a project equals the length of which path from start to finish?

  2. An activity has earliest start time EST = 4, latest finish time LFT = 12 and duration 3. What is its float?

  3. Three activities arrive at one event: from EST 6 with duration 5, from EST 9 with duration 3, and from EST 8 with duration 4. By the forward scan, what is the EST of that event?

  4. Two activities leave one event: one (duration 6) ends at an event with LFT 14, the other (duration 2) ends at an event with LFT 9. By the backward scan, what is the LFT of the event they leave?

  5. Activity K has EST = 5, EFT = 9, LST = 7 and LFT = 11. Is K on the critical path?

  6. A network has two paths from start to finish: path P with activity durations 4, 3, 6, 2 and path Q with durations 5, 4, 7. Which path is critical and what is the minimum completion time?

  7. An activity from event i to event j has EST = 6 and duration 4. What is its earliest finish time (EFT)?

  8. A forward scan gives the project-end event an EST of 22 days. What is the latest finish time (LFT) of that project-end event?

  9. A project has A (2 days, no predecessor), then parallel B (3), C (2) and D (4) all needing A, then E (5) needing B, C and D, then F (3) needing E, then G (1) needing F. What is the minimum completion time?

  10. In a build, external walls C (duration 3) starts at an event with EST 10 and ends at an event with LFT 14. What is the float of C?