You might have a little better response posting on the software forum.
What you are asking is like comparing apples to shovels. Although you might use a shovel to plant an apple tree, a comparison between the two doesn’t come immediately to mind.
CMM(i) and SS are similar. The Six Sigma DMAIC process can be a useful tool to an organization attempting to improve it’s CMMI results. The Six Sigma DFSS process can be a useful part of the software process for an organization with a reasonable level of maturity.
Conversely, an organization seeking to improve its software development process using DMAIC might well look to the CMMI for process improvement opportunities.
So while the two aren’t totally unrelated, they aren’t replacements for each other either.
Six Sigma provides through DMAIC, a well defined methodology for improving a processes capability. Through DFSS, it provides a methodology for implementing products or processes which meet customer needs. CMMI provides a measurement framework which can give one some insight into how a particular software process measures up to practices which have been proven to be successful.
–McD
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