Question

Task Processing Time (hrs. 13

Answer 1

Answer:

step 1	find early start, and early finish from the start of the project for each activity
step 2	Find Maximum EF and keep it as the LF of last activities. Max of EF's is 56
step 3	calculate LS for each activity after calculating its EF

Activity	Duration, D	Early start, ES=Max of early finish of preceding activities	Early finish, EF = ES + D	Late finish, LF= Min of LS of successor activities	Late start, LS= LF - D	Total slack= LF-EF	Critical activity, activities with 0 slack time
A	13	0	13	13	0	0	Yes
B	3	13	16	26	23	10	No
C	13	13	26	26	13	0	Yes
D	19	26	45	45	26	0	Yes
E	11	45	56	56	45	0	Yes
F	8	45	53	56	48	3	No

1. LF for task D= 45

2. Project completion time= 56

3.Critical path= A-C-D-E

4. Slack of task B= 10

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