Total 19 Posts

# Introducing the Gemba Academy School of Six Sigma

For the past 6 months I, along with my Gemba Academy colleagues, have been extremely busy developing what we now call the Gemba Academy School of Six Sigma. I’m obviously extremely biased… but I have to confess… I’m quite happy with the result. The School of Six Sigma consists of

# 5 Critical Control Chart Characteristics You May Not Be Aware Of

No matter if you call yourself a “lean practitioner” or “six sigma practitioner” or some combination of the two… one “tool” you should have a deep understanding of is the control chart. I’ve written about control charts before so if you’re not familiar with what they are I’d suggest you

# Calculating Rolled Throughput Yield (RTY)

One of the most powerful operational metrics I know of is Rolled Throughput Yield (RTY).  It’s used to assess the “true” yield of a given process.  This includes what we often call the “hidden factory” that plagues so many organizations… sucking profit right off their financial statements! Traditional Yield Let’s

# Explaining the Central Limit Theorem

If you hate statistics this post is for you. Why? Because it’s my intention to have you understand AND be in position to teach others one of the more complicated and misunderstood statistical concepts of our time – the central limit theorem (CLT) – by the end of this article.  If

# 10 Steps to Creating a FMEA

A Failure Modes Effect Analysis (FMEA) is an extremely powerful tool that anyone can, and will, benefit from no matter your occupation or status in life. Tonight, we’ll discuss the history of the FMEA, the different types of FMEA, and finally how to actually construct one.  At the end of the

# How to apply the one sample t-test

Last night we discussed the history and background of the one sample t-test.  As promised, tonight we will discuss how it is you actually use the slick little hypothesis test.  At the end of this post is a free case study available for download. When to use it We may choose

# How beer influenced statistics

Back in the early 1900s a certain W.S. Gosset, an Englishmen, was tasked with brewing better beer.  Really, I’m being serious. Gosset was a bright man, with two degrees from Oxford, and was hired by Guinness to help them brew the best beer using statistical methods instead of the “tribal knowledge” approach most

# 5 Steps to Data Collection

In most Six Sigma training programs and text books  you will hear about a 5 step data collection process.  However, what they don’t tell you is that collecting data is tricky.  Many people think they can simply run off and grab some data, whip it into a spreadsheet, press some

# Repetitions versus Replications

Many Lean & Six Sigma practitioners struggle to differentiate between a repetition and replication. Normally this confusion arises when dealing with Design of Experiments (DOE). Let’s use an example to explain the difference. Paint Booth DOE Design Sallie wants to run a DOE in her paint booth. After some brainstorming

# Taguchi Index – Cpm

Last night we discussed the Taguchi Loss Function and how Taguchi methods are more concerned with hitting the target compared to more traditional methods that often focus on keeping our data between the upper and lower specification limits. Cpm Staying with this theme I now want to introduce Taguchi’s version