Exercises: 13.1, 13.3, and 13.11

EX13.1 Answers

	EX13.1
	Given the diagram shown in figure EX 13.1, with activities A through G and duration times,
a.	Identify the paths and path duration times.
	Path	Duration Time
b.	Determine the critical path

EX13.3 Answers

EX13.3

Calculate ES, LS, EF, LF and slack time for the activities in Exercise 13.1.

Activities

Duration Time

ES

LS

EF

LF

Slack Time

A

B

C

D

E

F

G

Path

Duration Time

ES

LS

EF

LF

Slack Time

AD

BE

CFG

EX13.11 Answers

EX13.11

PERT - Probabilistic

Length of Project =

Project Variance

Number of Critical Path(s) =

Activity Name

Description

Predecessor

Optimistic time (o)

Most likely time (m)

Pessimistic time (p)

Activity Name

On Critical Path

Average Time

Earliest Start

Latest Start

Earliest Finish

Latest Finish

Total Slack

Activity Variance

A

Design

A

B

Budget estimate

B

C

Permits

C

D

Bid process

D

E

Subcontractor buyout

E

F

Startup

F

G

New additional construction

G

H

Cooling tower procurement

H

I

Cooling tower installation

I

J

LOX/fuel tank

J

K

Boiler procurement

K

L

Boiler installation

L

M

Abate old boiler

M

N

Chiller procurement

N

O

Chiller installation

O

P

Generator procurement

P

Q

Generator installation

Q

R

Final inspection/testing

R

S

S

T

T

U

U

V

V

W

W

X

X

Y

Y

Z

Z

Target Time

147

Target Probability

Probability

Time

Target Time

150

Probability

Target Time

152

Probability

7

4

5

8

7

11

A

B

C

3

F

E

D

Start

G

Finish