Measurement
and the CMMs – PSM ‘02
How much are requirements changing and where in the project LC is
it happening? Are the number of overall requirements
growing? What is the rate of growth? Has the scope expanded such
that the project needs to be replanned?
Caliber, Requisite Pro or SRS (current count); SCRs
Information Need
Decision Criteria &
Indicator
Analysis Model
Derived Measure(s)
Functions
Base Measures
Measurement
Methods
The Process (Entities
& Attributes)
Requirements Growth & Stability
See
Figure 1
If Growth > 10% OR Instability >
10%, must document analysis.
If there is any Growth or Instability
in Testing Phase, must document analysis.
Growth
Instability
Growth = Reqs Added/Total Reqs
Instability = (Reqs Added + Changed + Deleted)/Total Reqs
Total Requirements at time t
Reqts Added in period t
Reqts Changed in period t
Current count+ added - deleted
query SCR system for # reqts added in project in period t
query SCR system for # reqts changed in project in period t
Reqts Deleted in period t
query SCR system for # reqts deleted in project in period t