The Six Sigma toolkit includes a large range of graphs, from Histograms to Pareto Charts, and from Box plots to Scatter plots. They can all be found in Minitab, and can often be created in a click of a [...]
Six Sigma provides a large range of tools and techniques that can be used within the Analyse phase. The challenge therefore, becomes knowing which tool to use when! The phrases Process Door and Data Door are a useful way [...]
So what is Sigma Shift and what does it mean for you? Processes tend to behave differently over the short and long terms. For example, they might be stable and predictable over just a few minutes or hours (ie. [...]
Problem Statements are one of the most powerful tools in the Six Sigma tool kit (and there are no statistics involved!) A problem statement is a short but concise description of a problem. In just 2-3 sentences, a problem [...]
Q: Minitab and Six Sigma are often mentioned in the same breath, but what does Minitab actually do? A: Minitab is a software package that helps you to analyse data. Analysing data is an important part of Six Sigma [...]
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 [...]
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 [...]
