Exemplar A

Introduction

Proman is a company that specialises in managing building projects. It has been contracted to manage a project to build a new shopping mall in Albany.

Task

• a network diagram showing the tasks in the project

• the tasks in the critical path of the project• the minimum length of time required to

complete the project • the start and finish time for each task• the allocation of tasks to a minimum number of

supervisors, given that each supervisor will only supervise one task at a time

• a recommendation of a week when the manager can visit

the site and see at least three different tasks in action

• a discussion about the impact on the project if Task D takes longer than three weeks to complete

• a discussion about the impact of any other delays significant enough to extend the project’s minimum completion time, including the implications for scheduling of supervisors.

Achieved

• a network diagram showing the tasks in the project

• the tasks in the critical path of the project• the minimum length of time required to

complete the project • the start and finish time for each task• the allocation of tasks to a minimum number of

supervisors, given that each supervisor will only supervise one task at a time

Merit

• Establish the critical path and its length• the start and finish time for each task• the allocation of tasks to a minimum number of

supervisors, given that each supervisor will only supervise one task at a time

• a recommendation of a week when the manager can visit the site and see at least three different tasks in action

• a discussion about the impact on the project if Task D takes longer than three weeks to complete

Excellence

• a recommendation of a week when the manager can visit the site and see at least three different tasks in action with reasons

• a discussion about the impact on the project if Task D takes longer than three weeks to complete possibly with added solutions

• a discussion about the impact of any other delays significant enough to extend the project’s minimum completion time, including the implications for scheduling of supervisors. This would include a discussion on float times with respect to project requirements.

Precedence Table

Task ShadowA AB BC CD DE EF FG GH HI I

Start

A

B H

C

D

E F

G

I Finish

NETWORK DIAGRAM

Start

Finish

Forward passMINIMUM TIME = 26 WEEKS

A

50 5

B

60 6

E

15 6

D

35 8

C

45 9

F

46 10

G

1410 24

H

129 21

I

224 26

Start

Finish

Backward pass

A

50 5

50 0

B

60 6

126 6

E

15 6

65 0

D

35 8

107 2

C

45 9

128 3

F

46 10

106 0

G

1410 24

2410 0

H

129 21

2412 3

I

224 26

2624 0

Start

Finish

Critical Path A-E-F-G-I

A

50 5

50 0

B

60 6

126 6

E

15 6

65 0

D

35 8

107 2

C

45 9

128 3

F

46 10

106 0

G

1410 24

2410 0

H

129 21

2412 3

I

224 26

2624 0

Gantt Diagram

Scheduling- critical path

Scheduling- Different combinations are possible

Supervisor 1: Critical Path A-E-F-G-ISupervisor 2: B-D-HSupervisor 3: C

Any delay in the critical path will delay the whole project as there is no float

Supervisor 1: Critical Path A-E-F-G-ISupervisor 2: B-D-HSupervisor 3: C

With this scheduling, D has a float of 1 week and hence any delay longer than this will delay the project as D must be finished by

week 10 so as not to delay G which is on the critical path.

Supervisor 1: Critical Path A-E-F-G-ISupervisor 2: B-D-HSupervisor 3: C

If there is likely to be a delay in D, we should reschedule to allow D to have its maximum float time of 2 weeks. See reschedule

below.

Supervisor 1: Critical Path A-E-F-G-ISupervisor 2: B-C-HSupervisor 3: D

This seems to be a better schedule as B, H and C would now have a 2 week float as well as D.

Supervisor 1: Critical Path A-E-F-G-ISupervisor 2: B-C-HSupervisor 3: D