Question

AON

The table given below contains the activity label, its respective duration (in weeks) and its precedents.

Use critical path method to find the critical path and activities of this project.

ACTIVITY	DURATION (IN WEEKS)	PRECEDENTS
A	6	–
B	4	–
C	3	A
D	4	B
E	3	B
F	10	–
G	3	E, F
H	2	C, D

Answer 1

First Identify the Earliest Start time (ES) and Earliest Finish time (EF)

ES = The latest EF of the precedence activities ( (Which is directly dependent on each other)

EF = ES + Duration

For the last activity ES = LS and EF = LF

now work backward

LF = Earliest LS of the following activities (Which is directly dependent on each other)

LS = LF - Duration

All activities are critical for which ES = LS