Systematic process improvement using ISO 9001:2000 and CMMI

6.3 Transitioning from the CMM ® to the CMMI ® 181
Figure 6.7
Process improvement approaches.
However, an organization at CMM ® maturity level 3 has several possible
ways to transition to CMMI ® maturity level 3, as shown in Figure 6.8. Such
an organization can attempt to extend those PAs with roots in the CMM ® ,
such as RD or TS, and then implement those PAs that are not in the CMM ® ,
such as DAR. Alternatively, it can transition to CMMI ® maturity level 2, and
then add maturity level 3 practices as shown in Figure 6.8(a). A hybrid
approach can also be devised, in which an enhanced organizational standard
process and associated tailoring criteria can be developed and implemented.
Level 2 PAs can then be transitioned to the CMMI ® using GP 3.1 and 3.2
generic practices, and finally all level 3 PAs including those that were added
to the CMMI ® can be implemented as shown in Figure 6.8(b).
The continuous representation provides even more options. An organization
without previous process improvement experience may choose to first
institutionalize all PAs by using threads. In this approach, the enabling PAs
(explained in Chapter 5 and reinforced earlier in this chapter) are imple-