There are two types of data: things that we measure and things that we count. Continuous data is data that can be derived from measuring things. Continuous data can be defined as any data that is measured by a measuring device (e.g. stopwatch, scale, tape measures),...

LSS practitioners have long used the Lean Six Sigma (LSS), tool 6S, to organize workspaces. It can also be very useful. Q: What’s the difference between value or worth? A: Value is what you get when someone exchanges something like money for a product or...

The Analyze phase in DMAIC aims to find the root cause for the variation in our process. Sometimes, the culprits are simple to find. Sometimes, the culprits are easy to identify. How do you create a hypothesis about what is causing the...

The 5 Whys Technique: Origins The 5 Whys steps method was developed by Sakichi Toyoda in Japan, who is also an inventor and founder of Toyota Industries. It was popularized in the 1970s and Toyota still uses it today to solve problems. Toyota believes in a...

Dr. Arbuthnot, a Scottish physician, invented the one sample sign nonparametric hypothesis test in 1710, but, what is the one sample sign t test? Sign testing is used to verify the null hypothesis that a distribution’s median equals some hypothesized value. It...