Question

Given the following information, Construct the PDM network and use the information given in the following table, calculate ES, EF, LS, LF and the critical activities.

Project Data:

1-U and R can be performed concurrently and both begin on the start of the project.

2-Activity X is independent of both activities Q and K

3-E must start before work on activity K can begin.

4-Neither activity F nor activity G can start before activity R start. However, activities F and G can be performed concurrently.

5-Activity U must finish before the completion of activities E and Q.

6-Activity Q must start before the completion ofactivity J.

7-Activity C is independent of both activities Fand G but follows activity K.

8-Activities E and Q can be done concurrently.

9-Activity H can begin only after activates C, K and J are completed.

10-Activity H is the last activity.

11-Activity X is dependent on the start of activates F and G.

12-Activity G cannot be completed until activity F has started.

13-Consider the following lag time

- U and Q (FF) Lag=2, -U and E (FF)Lag =2, -E and K (SS), Lag=2, -R and G (SS)Lag=2, R and F (SS), Lag=3, -F and G (SF), Lag=1, Q and J (SF), Lag=1

14-The project activities are listed below

Activity	Number	Duration
U	1	1
R	2	3
F	3	5
G	4	4
E	5	2
Q	6	4
K	7	5
X	8	7
J	9	2
C	10	6
H	11	3

Answer 1

The PDM network is constructed by using the given project data.

Refer the legends to understand the network correctly.

Early Start(ES), Early Finish(EF), Late Start (LS), Late Finish (LF) , Float (F) , critical activities and Critical paths are found.

Critical paths and activities are highlighted in the network diagram.

U>E>K>C>H

R>F>X>H

All the calculated values are tabulated in the last image for quick and easy reference.

(Please give a thumbs up ).