Question

Can someone please help me with this Operations Management Question?

The following activities are part of a project to be scheduled using CPM: ACTIVITY IMMEDIATE PREDECESSOR TIME (WEEKS) MO OWO 10ம் ONNON b. What is the critical path? O O O O A-C-D-E-G A-B-E-G A-B-D-F-G A-C-D-F-G c. How many weeks will it take to complete the project? Number of weeks d. How much slack does activity B have? Slack of activity B week(s)

Answer 1

1. A + B + E + G

2. COMPLETION = 25

3.SLACK OF B = 0, BECAUSE IT IS ON THE CRITICAL PATH.

ACTIVITY	DURATION	ES	EF	LS	LF	SLACK
A	6	0	6	0	6	0
B	7	6	13	6	13	0
C	2	6	8	7	9	1
D	4	8	12	9	13	1
E	5	13	18	13	18	0
F	3	12	15	15	18	3
G	7	18	25	18	25	0

FORWARD PASS

We calculate the ES and EF values using a forward pass where the ES of an activity is the maximum EF of all the predecessor activities.

BACKWARD PASS

We calculate the LS and LF values using a backward pass where the LF of the activity is the minimum of all the successor activities.

SLACK

Slack is the value which is determined by subtracting EF from the LF or ES from the LS.

CRITICAL PATH

Critical path is the chain in the project network where the slack value of all the activities is 0, what this means is that any delay in these activities would result in delaying the entire project.

CRITICAL PATH & DURATION

A + B + E + G = 25