Quality
Basic quality tools, Six Sigma, Lean Six Sigma and Total Quality Management (TQM).
Real case
On a gear-and-chain assembly line in Ciudad Juárez (Mexico), a 24-day Lean Six Sigma project cut defects from 115,044 to 26,400 per million (sigma level from 2.6 to 3.4), raised productivity from 1.8 to 2.5 pieces per minute per person and reduced lead time from 26.07 to 17 seconds. It was achieved by rebalancing the stations, without adding operators.
Source: CULCYT article, Universidad Autónoma de Ciudad Juárez. See the article
4 articles
Lean Six Sigma: the speed of Lean and the precision of Six Sigma
Lean Six Sigma combines Lean's waste elimination and flow with Six Sigma's variation reduction, using the DMAIC cycle. A real case from a gear and chain line solved a delivery problem in 24 days.
Six Sigma: what it is, what the sigma level means and how it is calculated
Six Sigma measures the quality of a process in defects per million opportunities and seeks to reduce variation down to 3.4. It is organized around the DMAIC cycle and a hierarchy of roles known as belts.
The 7 basic quality tools
Seven simple graphical and statistical methods, selected by Ishikawa, that solve most quality problems on the plant floor without requiring advanced statistics.
Total quality management (TQM): Deming, Juran, Feigenbaum and ISO
Total quality means making quality the responsibility of the whole company and not of a control department. It was born with Deming, Juran and Feigenbaum in Japan and today coexists with ISO 9001 and Six Sigma.