CS605 Software Engineering-II Assignment 3 Solution Spring 25th June 2013

Q.1 For a certain project:
Budgeted Cost of Work Perform = BCWP = 4
Actual cost work performed        = ACWP = 4

Calculate the value of “Cost performance index” i.e. CPI.                                                             // 2 marks
Also mention, the conclusion you draw from this value regarding the cost/budget of the project?   // 1 mark
Solution: 
cost performance index, CPI = BCWP/ACWP
                                                     = 4/4
                                                     = 1
value of CPI =1 means project is within its defined budget.
Q.2           Assume you are a Project Manager of a company named Netsol and you have been asked to compute earned value analysis for a software project.  The project has 50 planned work tasks that are estimated to require 510 person-days to complete.  At the time that you have been asked to do the earned value analysis, 10 tasks have been completed.  However, the project schedule indicates that 12 tasks should have been completed.  The following scheduling data (in person-days) are available:
Solution: 

Task	Planned Effort	Actual Effort
1	12	11
2	14	12
3	14	16
4	8	11.5
5	10	9.5
6	20	19
7	10	9
8	4	5
9	12	10
10	6	5
11	6
12	14

Compute the SPI, schedule variance, percent scheduled for completion, percent complete, CPI, and cost variance for the project.                                            // Marks 12
Note: 2 marks for each calculation

Solution:
Budgeted cost of work scheduled (BCWS) —-for 12 tasks
12+ 14 + 14 + 8 + 10 + 20 + 10 + 4 + 12 + 6 + 6 + 14 = 130
Budgeted cost of work performed (BCWP) —– for 10 tasks
12+ 14 + 14 + 8 + 10 + 20 + 10 + 4 + 12 + 6  = 110
Actual Cost of Work Performed (ACWP)
11 + 12 + 16 + 11.5 + 9.5 + 19 + 9 + 5 + 10 + 5 = 108
Budget at Completion =  510

Schedule performance index, SPI = BCWP/BCWS = 110/130 = 0.84
Schedule variance, SV = BCWP – BCWS = 110 – 130 = -20
Percent scheduled for completion = BCWS/BAC = 130/510 = 0.25
Percent complete = BCWP/BAC = 110/510 = 0.21
Cost performance index, CPI = BCWP/ACWP = 110/108 = 1.01
Cost variance, CV = BCWP – ACWP = 110 – 108 = 2