Tutorial 03 (Answers) PDF

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Faculty of Computing and Informatics TIS2211 / TSE2251 Systems Analysis and DesignTutorial 3 Calculate the expected time for the following activities: Activity Optimistic TimeMost Likely Time Pessimistic Time Expected TimeA 3 5 7 5. B 5 7 10 7. C 7 9 14 9. D 2 6 7 5. E 1 3 5 3. F 5 7 10 7. G 8 7 14 ...

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Faculty of Computing and Informatics

TIS2211 / TSE2251 Systems Analysis and Design Tutorial 3 1. Calculate the expected time for the following activities: Activity A B C D E F G H I J

Optimistic Time Most Likely Time 3 5 5 7 7 9 2 6 1 3 5 7 8 7 1 2 4 7 5 8

Pessimistic Time 7 10 14 7 5 10 14 5 9 11

Expected Time 5.0 7.2 9.5 5.5 3.0 7.2 8.3 2.3 6.8 8.0

o +4 r+ p 6 Optimistic Time+4 Most Likely Time+ Pessmistic Time Expected Time= 6 ET=

2. A project has been defined to contain the following list of activities along with their required times for completion Activity 1- collect requirements 2- analyze processes 3- analyze data 4- design processes 5- design data 6- design screens 7- design reports 8- program 9- test and document 10- install

Time (weeks) 2 3 3 7 6 1 5 4 8 2

Immediate Predecessors 1 2 2 2 3, 4 4, 5 6, 7 7 8,9

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a. Draw the network diagram for the activities. Notation Activit y TE 1 2

2 2

TE  calculate from 1st activity to last activity  choose the largest  +

ET TL

2 5

5-3=2 2+3=5

3 5

20-3=17 5+3=8

3 8

TL  calculate from last activity to 1st activity  choose the smallest  – 3 2 0

12-7=5 5+7=12 5+6=11 5 11

6 1 2

6 13

1 2 1

21-1=20 4 12

12-6=6

21-1=20 8+1=9

12+5=17

12+1=13

7 1 2

13+4=17 8 21

17-5=12

17-5=12

25-4=21

11+7=16

21-4=21 4 2 5

17+4=21 7 17

17+8=25

9 25

5 1 7

21+2=23

27-2=25

25-8=17

8 2 5

27-2=25 25+2=2

10 27

2 2 7

b. Calculate the earliest expected completion time. 27 c. Show the critical path. 1  2  4  7  9  10 d. What would happen if Activity 6 were revised to take six weeks instead of one week? Activity 6 will not give impact to the completion of the project.

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3. List the five key activities done by a project manager during a project execution? Execute baseline project plan (BPP) Monitor progress against baseline plan Manage changes in baseline plan Maintain project workbook Communicate project status 4. Explain the major differences between a network diagram and a Gantt chart. Gantt Chart show task duration (calendar / date) show time overlap

Network Diagram / PERT Chart show duration in the box do not show time overlap, but show dependencies / relationship among activities

5. Assume that you have a project with SEVEN activities labeled A-G. Derive the earliest completion time (TE), latest completion time (TL) and the slack for each of the following tasks (start at time = 0). Which tasks are on the critical path? Draw a network diagram for the tasks shown. Highlight the critical path in the network diagram. Activit y A B C D E F G

Preceding Event(s) A A C B, C D D, E, F

Duration (DT) 5 3 4 6 4 1 5

TE

TL

Slack

Critical Path?

5 8 9 15 13 16 21

5 12 9 15 16 16 21

0 4 0 0 3 0 0

      

Notation ET Slack Activity TE TL

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5

0 A

5

5

5+3=8 12-3=9

3

4 B

8

12

8+4=12 16-4=12

4

3 E

13

16 13+5=18

9+4=13

5+4=9

21-5=16

16-4=12

9-4=5 4

0 C

9

9

9+6=15 15-6=9

6

0 D

15

16-1=15

15

15+5=20 21-5=16

5

0 G

21

21

15+1=16 16+5=21 21-5=16 1

0 F

16

16

Critical Path: A  C  D  F  G 6. What are the differences between problem identification and problem solving? Problem identification is a way to find the gap or measurement between the current problem and expectation. Problem solving is the solution or alternative solution to reduce the gap or measurement. 7. Describe the activities performed by the project manager during project planning. Define project scope, alternatives, feasibility Divide project into tasks Estimate resource requirements Develop preliminary schedule Develop communication plan Determine standards and procedures Identify and assess risk Create preliminary budget Develop a statement of work Set baseline project plan

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8. Match the key terms to the following definition that best fits it. Project Manager Project Deliverable Feasibility Study Project Management Project Initiation Project Workbook Project Planning WBS (Work Breakdown Structure)

Gantt Chart Network Diagram Project Execution Project Closedown Project Charter Critical Path Scheduling Critical Path Slack Time PERT (Program Evaluation Review Technique)

a) A controlled process of initiating, planning, executing and closing down a project. Project Management b) The shortest time in which a project can be completed. Critical Path c) A systems analyst with a diverse set of skills: management, leadership, technical, conflict management and customer relationship – who is responsible for initiating, planning, executing and closing down a project. Project Manager d) An end product of an SDLC phase. Deliverable e) The amount of time that an activity can be delayed without delaying the entire project. Slack Time f) The process of dividing the project into manageable tasks and logically ordering them to ensure a smooth evolution between tasks. WBS (Work Breakdown Structure) g) A technique that uses optimistic, pessimistic and realistic time estimates to calculate the expected completion time for a particular task. PERT (Program Evaluation Review Technique)

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h) An online or hard-copy repository for all project correspondence, inputs, outputs, deliverables, procedures and standards. Project Workbook i) A short document prepared for customer during project initiation that describes what the project will deliver and outlines, generally at a high level, all work required to complete the project. Project Charter j) A study that determines if the proposed information system makes sense for the organization from an economic and operational standpoint. Feasibility Study

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