SQA Engineer Interview Question:

Can you please explain the difference between ISO and CMM level?

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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 softwaredesigns 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.
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