What are KPI Trees? KPI Trees are a graphical method of managing KPIs. They are essentially a tree diagram, on which KPIs are positioned in order that there is a clear structure amongst them. Modern organisations often have lots [...]
We're proud to announce that Quentin Brook, author of our bestselling Lean Six Sigma and Minitab book, will be presenting a series of three webinars on behalf of Minitab entitled 'Minitab Need to Knows' The webinars are designed for beginners and [...]
What are Pareto charts? A Pareto Chart is a bit like a bar chart, in that it presents the frequency of results of different categories of data. The key difference however, is that a Pareto Chart orders the results [...]
What are ‘Data Worlds’? The phrase ‘Data World’ refers to types of numerical data. All numerical data can be grouped into the three types, and these are described as the Continuous, Count and Attribute Data Worlds. The Continuous Data [...]
What is ‘Analysis of Residuals’? Analysis of Residuals’ is a mathematical method for checking if a regression model is a ‘good fit’. Imagine that you have identified that a correlation exists (click here for a refresher on correlation) between [...]
What are Confidence Intervals? Let’s start at the beginning: When a sample of data is taken from a process, and a statistic (e.g. an average, percentage or median) is calculated from that sample of data, we have to remember [...]
What is SPC? Statistical Process Control (SPC) is an approach that helps to monitor and control the output of a process by assessing the stability of the process and the type of variation that is present. SPC charts can [...]
In a separate article, we introduced Correlation and the Pearson coefficient, and this article looks in more detail at how to interpret the Pearson coefficient, and in particular, it's p-value. Firstly, a reminder of the scatter plots and the [...]
Edition 5 of our best selling book for Lean and Six Sigma professionals is now available for pre-order, with first shipments on the 1st October 2017! Lean Six Sigma and Minitab has sold over 150,000 copies worldwide since it was first published [...]
Correlation is a technique that helps to identify if there is a relationship between two sets of data (typically an input and output of a process). Nb: It’s important to remember that Correlation helps to establish if a mathematical [...]
