Assignments for the third installment of ISQS 5243 Home Work

1. Translate this diagram to an activity in the box format. Calculate ES, EF, LS and LF times and the slack for each activity in the figure below, where an activity is represented by an arrow.

C, 5 G,8

A, 4 D, 6 H, 8 K,10

M,1

B, 7 E,9 I, 3 L,9

F,5 J,3

2. Find all the paths through this network. Find the critical path for this project. The number in each box represents the duration in days of the associated task. For each task, deter mine ES, EF, LS, LF and slack. Place the ES number on the upper corner left above each block, the EF number on the upper right above each block, the LS number on the lower left corner below each block and the LF number on the lower right below each block.

3. For the network diagram above, find the best crashing strategy considering that you have $1200 in crashing budget and the following:

Task / Crash cost/day / Minimum duration
A / $100 / 3
B / $200 / 6
C / $300 / 8
D / $400 / 6
E / $300 / 9
F / $200 / 4
G / $100 / 8
H / $500 / 10

4. Draw an activity on node representation for the following network information. Find the critical path, and determine its length. For each activity determine its earliest start time, its earliest finish time, its latest start time and its latest finish time.

MINIMUM PRECEDENTCRASH

ACT. DURATION DURATION ACTIVITYCOST/DAY

A 93 -$400

B 86A$300

C 128A$200

D 126B, C$100

E 119B, C$200

F 64D, E$300

G 98D,E,F$400

5. For the PERT network shown below, find the critical path and its expected mean duration. Assume all durations are in days. Find the standard deviation of the critical path. What is the probability the project depicted by this network will be finished in 20 days? In 25 days? In 30 days.

6. In this MS PROJECT exercise you are going to enter the following tasks along with each task’s duration (in days) and the predecessor tasks into Microsoft Project.

No.NAMEDURATIONPREDECESSOR TASK

1Definition-

1.1Interviews2-

1.2Prep Req.Doc.21.1

1.3Prep Pre Proj Plan21.2

1.4 Prep Proposal2 1.3

2 Analysis 1

2.1 Interviews 1

2.1.1Management1 1

2.1.2 Supervisor2 2.1.1

2.1.3 Technical2 2.1.2

2.1.4 Clerical2 2.1.3

2.2 Anal Existing Doc3 1

2.3 Synthesis3 2.2

2.4 Functional Spec5 2.3,2.1.4

2.5 Re-estimate1 2.4

2.6 Development Prop4 2.5

2.7 Presentation4 2.5

3 Design 2.6,2.7

3.1 System Design5 2.6,2.7

3.2 Walk-through1 3.1

3.3 File Design2 2.6, 2.7

3.4 Walk-through1 3.3

3.5 Acc. Test Plan4 3.1

3.6 Design Spec5 3.5

Follow instructions given in class.

The numbers shown to the left above are there to indicate subordination and precedence. You will be entering these task numbers along with the task names in the same field. However, MICROSOFT PROJECT will be assigning its own work breakdown structure numbers. Interviews, Anal Existing Doc, Synthesis, Functional Spec, Re-estimate, Development Prop and Presentation are all subtasks within Analysis. This is precisely what the 2.x is intended to designate. Likewise,

2.1.1 Management

2.1.2 Supervisor

2.1.3 Technical

2.1.4 Clerical

are all subsubtasks of subtask 2.1 Interviews. It will be necessary for you to DEMOTE these subtasks and subsubtasks appropriately in MICROSOFT PROJECT by use of the demotion arrow in the upper left-hand corner of the Gantt Chart view.

Assign the following resources to the tasks:

RESOURCETASKHOURLY RATE

Kirk KennedyDefinition40

Norbert Norris Analysis Interviews50

Floyd FordAnalyzing exist doc, Synthesis, Presentation, 50

all remaining analysis

Frida FisherDesign (ALL)50

Judy Johnsonany remaining unassigned tasks20

Determine the project budget and cost. Printout both the Gantt view and the Network diagram. Be sure to include the cost column in the entry table of the Gantt view. Be sure to show Project as your summary task to which all other tasks are subordinate.

7.

In the above, assume tasks A, B & C all started seven business days ago. Planned durations are in days and are the numbers in the boxes shown above. A is 80% complete, B is 50% complete and C is 70% complete. So far, $20,000 has been spent on A, $30,000 on B. $40,000 on C, and nothing on D. The budgeted daily costs for A, B, C and D are $4000, $5000, $6000 and $7000, respectively. The budget for A is 6*$4000 or $24,000. To determine BCWS, assume seven working days have transpired. For example, the BCWS for A is $28,000. Assume five-day work weeks, with no work being done on Saturday or Sunday. Determine for A, B and C, BCWP, BCWS, ACWP, CV(=BCWP – ACWP), SV(=BCWP – BCWS). Complete the following table.

TASK / TOTAL BUDGET / %COMP / ACWP / BCWS / BCWP / CV / SV
A
B
C
D
TOTALS / XXXXXX

For the above table and network, determine BAC, EAC, TAC, ETAC. Comment on whether this project is behind schedule, ahead of schedule, over or under budget.

Homework set #3, November 25, 2003, page 1