New Product Software Quality Analysis Question:

The difference is that the CMM is a way to communicate
capabilities, and ISO is a way to communicate the process.
They are not necessarily incompatible.

The Capability Maturity Model is a very specific way of
classifying an organization's software development methods.
In a certain way, it tells how the quality of its software
designs is likely to be repeated.

ISO-9000 procedures describe a (possibly) definite
development process but gives no indication of the likely
quality of the designs or whether multiple software efforts
are likely to produce software of similar quality.