What Happened to Lean & Six Sigma? A Quiet Cultural Shift No One Talks About

What Happened to Six Sigma & Lean? A Quiet Shift No One Talks About, But Many Feel.

This piece explores the cultural drift inside Lean and Six Sigma over the past two decades — not the tools, but the professionalism that once defined the work. If you’ve sensed the shift but couldn’t articulate it, this breaks down what changed and why it matters.

Twenty-two years ago, when I entered these disciplines, professionalism was the expectation. It was the standard. You were expected to:

 • coach, not criticize

 • listen and understand before diagnosing

 • get your hands dirty

 • respect the people doing the work

 • carry yourself with humility

 • model emotional discipline

 • earn trust, not demand it

And if you behaved unprofessionally? You were held accountable. Because professionalism wasn’t negotiable. That was the culture. 𝐒𝐨𝐦𝐞𝐰𝐡𝐞𝐫𝐞 𝐚𝐥𝐨𝐧𝐠 𝐭𝐡𝐞 𝐰𝐚𝐲, 𝐬𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐬𝐡𝐢𝐟𝐭𝐞𝐝.

Today, I’m seeing a very different pattern: 

 • frameworks used as weapons, not learning structures

 • a “don’t question me” posture

 • textbook recitation instead of real observation

 • defensiveness instead of curiosity

 • status over skill

 • correction, lecturing, and condescension instead of coaching

And companies feel it. Operators feel it. Leaders feel it. Practitioners feel it. It’s one of the reasons so many organizations have started to pull away from Lean and Six Sigma. Not because the methods are flawed, but because the culture around them has drifted.

𝐓𝐡𝐞𝐫𝐞 𝐚𝐫𝐞 𝐢𝐧𝐜𝐫𝐞𝐝𝐢𝐛𝐥𝐞 𝐩𝐫𝐚𝐜𝐭𝐢𝐭𝐢𝐨𝐧𝐞𝐫𝐬 𝐨𝐮𝐭 𝐭𝐡𝐞𝐫𝐞. 𝐏𝐞𝐨𝐩𝐥𝐞 𝐰𝐡𝐨 𝐜𝐨𝐚𝐜𝐡, 𝐨𝐛𝐬𝐞𝐫𝐯𝐞, 𝐭𝐡𝐢𝐧𝐤, 𝐚𝐧𝐝 𝐫𝐞𝐬𝐩𝐞𝐜𝐭 𝐭𝐡𝐞 𝐩𝐞𝐨𝐩𝐥𝐞 𝐭𝐡𝐞𝐲 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡. 𝐈 𝐥𝐞𝐚𝐫𝐧𝐞𝐝 𝐟𝐫𝐨𝐦 𝐭𝐡𝐨𝐬𝐞 𝐩𝐞𝐨𝐩𝐥𝐞. 𝐈 𝐬𝐞𝐞 𝐭𝐡𝐨𝐬𝐞 𝐩𝐞𝐨𝐩𝐥𝐞. 𝐘𝐨𝐮 𝐜𝐚𝐫𝐫𝐲 𝐲𝐨𝐮𝐫𝐬𝐞𝐥𝐯𝐞𝐬 𝐰𝐢𝐭𝐡 𝐩𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥𝐢𝐬𝐦, 𝐚𝐧𝐝 𝐲𝐨𝐮 𝐚𝐫𝐞 𝐫𝐞𝐬𝐩𝐞𝐜𝐭𝐞𝐝 𝐟𝐨𝐫 𝐢𝐭. 𝐓𝐡𝐚𝐧𝐤 𝐲𝐨𝐮.

But I’m also seeing a rise in something else: Public behavior that would never have been tolerated years ago because it violates the professional standards these disciplines were built on.

This isn’t about nostalgia. It’s about naming a shift that’s impacting the credibility of both disciplines. If we want Six Sigma & Lean to be respected, we need to bring back what made them work in the first place:

• humility

• discipline

• coaching

• curiosity

• professionalism

• respect for the thinking

• respect for the people

𝐓𝐡𝐞 𝐭𝐨𝐨𝐥𝐬 𝐚𝐫𝐞𝐧’𝐭 𝐭𝐡𝐞 𝐩𝐫𝐨𝐛𝐥𝐞𝐦. 𝐓𝐡𝐞 𝐜𝐮𝐥𝐭𝐮𝐫𝐞 𝐢𝐬. 𝐓𝐡𝐞 𝐜𝐮𝐥𝐭𝐮𝐫𝐞 𝐜𝐚𝐧 𝐜𝐡𝐚𝐧𝐠𝐞, 𝐁𝐔𝐓 𝐨𝐧𝐥𝐲 𝐢𝐟 𝐰𝐞’𝐫𝐞 𝐰𝐢𝐥𝐥𝐢𝐧𝐠 𝐭𝐨 𝐧𝐚𝐦𝐞 𝐰𝐡𝐚𝐭’𝐬 𝐡𝐚𝐩𝐩𝐞𝐧𝐢𝐧𝐠 𝐭𝐨𝐝𝐚𝐲.

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