Critical paths and floatEdexcel International A Level Maths: Mind map

Exam questions on Critical paths and float

1. A project is modelled by an activity network with start event 1 and finish event 6. The activities are: A from event 1 to 2 (3 days); B from 1 to 3 (5 days); C from 2 to 4 (6 days); D from 3 to 4 (2 days); E from 3 to 5 (4 days); F from 4 to 6 (3 days); G from 5 to 6 (5 days).
   Calculate the total float on activity D.2 marks
2. A project is modelled by an activity network with start event 1 and finish event 5. The activities are: A from event 1 to 2 (6 days); B from 1 to 3 (4 days); C from 2 to 4 (3 days); a dummy from 2 to 3; D from 3 to 4 (7 days); E from 4 to 5 (5 days); F from 3 to 5 (9 days).
   Find the earliest finish time and the latest finish time of activity B, and hence its total float.2 marks
3. A project is modelled by an activity network with start event 1 and finish event 5. The activities are: A from event 1 to 2 (5 days); B from 1 to 3 (7 days); C from 2 to 4 (6 days); D from 3 to 4 (5 days); E from 3 to 5 (8 days); F from 4 to 5 (3 days).
   Carry out a forward pass and state the minimum project duration.3 marks