{"id":808,"date":"2022-10-01T02:00:14","date_gmt":"2022-10-01T02:00:14","guid":{"rendered":"https:\/\/mondaikaiketsu.net\/?p=808"},"modified":"2025-04-29T08:04:41","modified_gmt":"2025-04-29T08:04:41","slug":"lean-and-sixsigma","status":"publish","type":"post","link":"https:\/\/mondaikaiketsu.net\/en\/lean-and-sixsigma\/","title":{"rendered":"The difference between “Lean” and “Six Sigma”"},"content":{"rendered":"\n

Hello everyone. Last time<\/a> , I wrote about the high level flow of problem solving, from “as-is (current state analysis)” to “to-be (future state design)”.<\/p>\n\n\n\n

By the way, there is a method called \u201cLean Six Sigma\u201d as one of the problem solving methods in the world. I’m also a Six Sigma Master Black Belt (I’ll write more about what this is in this blog later -> I wrote it<\/a>!), so I’ll be writing about Lean Six Sigma as well in this blog.<\/p>\n\n\n\n

This time, I will write the overview of what is Lean Six Sigma. This Lean Six Sigma was originally systematized and introduced as separate methods called \u201cLean\u201d and \u201cSix Sigma\u201d.<\/p>\n\n\n\n

What is “Lean”?<\/strong><\/h2>\n\n\n\n

The famous “Toyota Production System” is the origin of Lean. It was compiled as a methodology by an American scholar who was studying the Toyota Production System.<\/p>\n\n\n\n

The purpose of lean is to “eliminate waste”. Eliminate waste in business processes.<\/p>\n\n\n\n

The actual procedure of Lean is called \u201cDMAIC\u201d. This is an acronym for the 5 steps of “Define” -> “Measure” -> “Analyze” -> “Improve” -> “Control”. There are various tools for each step of this DMAIC. I will introduce these in this blog gradually going forward.<\/p>\n\n\n\n

What is “Six Sigma”?<\/strong><\/h2>\n\n\n\n

It is a quality control method developed by US company, Motorola, and is said to have spread worldwide after being adopted by US company, GE. There is also a systematic quality control in Japan, and I think we can say that the contents are almost the same.<\/p>\n\n\n\n

The purpose of Six Sigma is to \u201creduce variation\u201d. Quality control, which reduces variations, is the source of Six Sigma. And from there, it has also been utilized as a problem solving technique.<\/p>\n\n\n\n

The procedure of Six Sigma, like Lean, actually follows the flow of \u201cDMAIC\u201d.<\/p>\n\n\n\n

And “Lean Six Sigma”<\/strong><\/h2>\n\n\n\n

Lean and Six Sigma originally had different backgrounds and goals, but the procedures were similar, especially since the tools used after DMAIC’s “A” were almost the same. That’s why I think “Lean” and “Six Sigma” have become told all together as “Lean Six Sigma”.<\/p>\n\n\n\n

By now, you can see that Lean Six Sigma follows the 5-step flow of DMAIC, and that tools are provided for each step. Some of these tools are specific to Lean Six Sigma, while others come from general problem solving techniques.<\/p>\n\n\n\n

To put it a little further, DMAIC also overlaps with the general problem solving procedure of \u201cas-is\u201d -> \u201cto-be\u201d. When we compare them, it looks like this.<\/p>\n\n\n\n

\"General
Figure 1. General problem solving and “Lean Six Sigma”<\/figcaption><\/figure>\n\n\n\n

Therefore, in this blog, I would like to introduce DMAIC as well as the flow from \u201cas-is\u201d to \u201cto-be\u201d.<\/p>\n\n\n\n

That’s all for this time, and I would like to continue from the next time onwards. Thank you for reading until the end.<\/p>\n","protected":false},"excerpt":{"rendered":"

Hello everyone. Last time , I wrote about the high level flow of problem solving, from “as-is (current state analysis)” to “to-be (f […]<\/p>\n","protected":false},"author":1,"featured_media":563,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"en_US","_original_post":"https:\/\/mondaikaiketsu.net\/?p=119","footnotes":""},"categories":[33,31],"tags":[],"class_list":["post-808","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lean-sixsigma-en","category-problem-solving-en","en-US"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/posts\/808","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/comments?post=808"}],"version-history":[{"count":26,"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/posts\/808\/revisions"}],"predecessor-version":[{"id":3144,"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/posts\/808\/revisions\/3144"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/media\/563"}],"wp:attachment":[{"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/media?parent=808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/categories?post=808"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mondaikaiketsu.net\/wp-json\/wp\/v2\/tags?post=808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}