Though truth is one there are many paths and all the paths are correct.  

LEAN, Six Sigma, AGILE, ISO, CMMI, TOC, BPM, and many more of its tributaries all lead to the same Goal. They are all tools and methods that enable effective execution of planned strategies.

Based on context, circumstances, needs, preferences & problem to be solved, the right path has to be chosen. Since i have had close encounter with some if these, i wanted to share what i have learned and experienced.

These are my own, mostly half baked; views, opinions & perspectives.

Srivatsa
ASQ [CMQ/OE | CQE | CQA] | CSM | CSSLP | CISA | PMP | LEAN Six Sigma Expert
Maximizing value to stakeholders through Quality Consciousness

Here is My LinkedIn Profile

*** The Certificates Mentioned above have long expired,
The Knowledge & Experience Acquired are forever Pertinent