Project R has gathered requirements metrics for the past 15 months. Requirements
ID: 3807766 • Letter: P
Question
Project R has gathered requirements metrics for the past 15 months. Requirements Development occurred during the first month and resulted in a baselined number of requirements of 45. For the remainder of the project, requirements were added, changed, or removed per the following table. Note that the cumulative metrics include changes from the time requirements are baselined (after month one) to the month for the row. Requirements churn is a measure of changes, including additions and deletions, to the requirements after they are initially agreed to (i.e., baselined). One metric for requirements churn is the ratio of the number of baselined requirements minus the total number of changes to the number of baselined requirements Churn = (RB-(RA + RD + RC))/RB where RB is the number of baselined requirements, RA.is the number of additions to the requirements after they were baselined, RD is the number of deletions to the requirements after they were baselined, and Rc_is the number of changed requirements after they were baselined. What is the minimum value for this churn metric? Why? What is the maximum value for this churn metric? Why? What is the "ideal" value for this churn metric? Why? Populate the churn column in the matrix with the cumulative churn metric for each month after the requirements were baselined for Project R.Explanation / Answer
1 ) The minimum value for this churn metric is 0.66 and this is for the second month because in this month the requirement were modified maximal and as we can see the churn is the measure of the chages so if there are changes then it will decrease by the same amount.
2) The maximum churn value is 1 which is for month 9. As we can see there were no changes in this month that's why it is maximum in this month it is maximum and accroding to churn formula if there were no changes then the churn value is the ratio of baselined requirements to baselined requirements which always results in 1.
3) The ideal value for this churn matric should be 1 because in the ideal case there will be no requirement change for a ideal development it should be based on the requirement gather in the initial phase.
4) churn
1 -
2 0.66
3 0.82
4 0.94
5 0.80
6 0.89
7 0.86
8 0.886
9 1
10 0.86
11 0.92
12 0.91
13 0.89
14 0.93
15 0.96
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