Is Lean an Acronym? No – And Here’s Where the Term Actually Came From
No. Lean is not an acronym when we are talking about Lean manufacturing, Lean healthcare, or the management approach. The word describes an approach to creating value with less waste; its letters do not stand for a sequence of steps.
I sometimes see it written as “LEAN,” which understandably makes people wonder what the letters mean. I usually write “Lean,” with a capital L. That is a writing convention, though, not a test of how well someone understands or practices improvement.
My original, rather emphatic answer to the acronym question included this video:
Where the term Lean production came from
John Krafcik used “lean production” in his 1988 Sloan Management Review article, “Triumph of the Lean Production System.” He was a researcher with MIT's International Motor Vehicle Program. The Lean Enterprise Institute's definition and history credits Krafcik with coining the term.
The word described a production approach that required fewer resources while delivering what customers needed. It was descriptive, rather than an abbreviation. James Womack, Daniel Jones, and Daniel Roos helped popularize it through The Machine That Changed the World in 1990. Womack and Jones later wrote Lean Thinking.
For more of that history, see the evolution of the term Lean production.
Why I write Lean rather than LEAN
An acronym such as TPS stands for specific words: Toyota Production System. Lean does not work that way. Expansions invented after the fact may be memory aids, but they do not explain the origin of the term.
I would correct the spelling in an article or presentation without drawing conclusions about the person who wrote it. A team can write “Lean” correctly and still blame employees for process problems. Another team might write “LEAN” while doing thoughtful improvement work. The behavior tells us more than the capitalization.
When LEAN is an acronym
There are exceptions outside this use of the word. The Lean Education Academic Network uses LEAN as its acronym. That organization's name does not make Lean management itself an acronym.
There is also the cynical expansion “Less Employees Are Needed.” I have heard versions of that joke, and it points to a real concern when organizations associate Lean with layoffs. It is not what the word stands for. Respect for people should shape how leaders improve work and use the time that improvement frees up.
Lean beyond manufacturing
Lean manufacturing describes an application of the approach. Healthcare, service, and other organizations can apply the same thinking to their own work. The useful questions are about customer needs, process conditions, and how people participate in improvement.
Bring Lean thinking to healthcare
In Lean Hospitals: Improving Quality, Patient Safety, and Employee Engagement, I explain how hospitals use Lean to reduce delays and errors and to engage the people who do the work. It is a Shingo Publication Award recipient, now in its third edition.
[…] often ask me where the term “Lean” comes from. It’s not an acronym, so it shouldn’t be spelled “LEAN” (but it often is). Lean is not a synonym for “lacking or […]
I have just seen some comments on LinkedIn regarding this and would like to add a comment about “the importance of understanding the history and context” of stuff, as opposed to how it is interpreted and used by a few, promoted by organisations for their own use etc.
In 1995 (shortly after Lean Thinking was published Womack and Jones – the fathers of the Lean movement) LEAN was an acronym (L- leadership and learning, E etc.) and introductory workshops and .ppt presentations used the acronym to help people understand what Lean was about (the codification of the Toyota Way) and it generic application to all business and sectors.
Lean should be used with a capital L because as the title to the book and the subject (holistic) itself it is a proper noun. I do not spell my name david!!.
Thanks, I didn’t know that history. I know LEI doesn’t spell it as “LEAN” today. I do agree with you that it’s a proper noun.
It bothers me when I see people write “lean Six Sigma” – capitalizing the one without the other (ASQ does this and it annoys me). They are both proper noun terms when used that way.
BTW, I’ve asked the Institute of Industrial Engineers magazine editor about why they say lean Six Sigma and he says that’s what the AP Style Guide says. Annoyingly inconsistent.
Thanks to NYU for saying it should be Lean in their style guide:
Thanks to Brent Brewington for pointing it out.
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Thank you. Couldn’t agree more!
This has always been a question of mine because I have noticed this issue, and I’m glad I am not the only one that has seen all of these variations. Very interesting to learn about the history as well in the comments.
I thought it was Leadership. Eliminate waste. Act now. Never ending. ?? That would be an acronym? Or was that added after the fact?
I’ve never heard that one.
“Lean” didn’t start as an acronym, going back to “lean production” in the book “The Machine That Changed the World.”