The last few decades, we have seen a lot of companies have implemented a host of different methodologies to improve the quality and efficiency of their outputs: Lean Manufacturing, TQM, Business Process Reengineering, Six Sigma, BPM, Business Performance Improvement, and so on. What all these methodologies have in common is a focus on PROCESS: An activity through which something, tangible or intangible, is transformed into something else.
At its most fundamental level, BUSINESS PROCESS EXCELLENCE is NOT a methodology, it is about IMPROVING THE WAY THAT BUSINESSES CREATE AND DELIVER VALUE TO THEIR CUSTOMERS.
Meanwhile, Lean and Six Sigma give companies supported tools and techniques to solve problems, and Business Process Management (BPM) looks at how aligning people, process and technology and automating key tasks can take business performance to the next level. However, the key is not just changing processes, is to change the way that people within a company work and behave.
That’s why BPE is about so much more than process improvement techniques. It’s about learning to solve problems and manage change, performance, and workplace culture to align with overall BUSINESS STRATEGIES.
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The BUSINESS PROCESS EXCELLENCE has become a key factor for success, next to the sustainability, organizational change management and quality management.
References
The blog of Logistics at MGEPS at UPV 
I love your topic. It is something special for me because I know many companies only think about creating process standards or some kind of improvement, however I am of those who think that the way people do the work is as important as carrying out a methodological process .
Yes, Willy… The most important change is to work with the people not only with the process.