Notes: (i) Total Slack / Float = Latest Finish Earliest Finish; or Latest Start Earliest Start. (ii) Tasks / activities with a total slack / float of 0 (zero) need to be completed on-time to enable the project to be completed on-time. Therefore, they are critical tasks / activities, and probably Milestones, and together form the Critical Path (Aviation Project Management, Flouris & Lock 2008, pages 118 and 119).

QUESTIONS:

1. Using the precedence notation box outlined above and the table of information presented below:

(i) Prepare a (free-hand) diagram of a project precedence network diagram;

(ii) Calculate the scheduling times and total slack/float for each activity;

Task	Time (days)	Immediate Predecessors or Independencies
A	24	-
B	18	-
C	30	A,B
D	8	-
E	30	C
F	14	D
G	31	E,F
H	36	G
		Note: The (-) against tasks A, B and D means that these tasks can all commence at the same time after a start node.