You Need This: Six Sigma Deployment - Mark Rewhorn So you think your company is doing, "Very nicely thank you”? You get things right 99% of the time and are delivering shareholder returns above 5%. Not too bad then? Well maybe? But it could be a whole lot better!! You are operating at a level of...
5 Comments

Why Do Process Improvements Fail, Or At Least Not Last? - Mark Rewhorn Most organisations are no strangers to change. There is constant pressure to achieve more in less time and usually with less resource. Shareholders demand a better return on their investment; down-stream consumer companies...
17 Comments

Teams. What is a Team? - Mark Rewhorn During six sigma training we often refer to teams. We recognise that we can’t do everything alone, so we suggest employing teams. However, if we ask, “What is a team?” we get many answers. If we were to ask team members for a characterisation of their...
2 Comments

What is the true cost of implementing six-sigma in your organisation?-By Mark Rewhorn Is it really worth it, does it all add up? Firstly, I must declare an interest here. I’m a trained and certified six-sigma black-belt, who delivers six-sigma training for a living. I have also delivered...
7 Comments

The Emperors New Clothes (Six Sigma Fad or Failure?) Six Sigma might make you look good, but can you afford it? We've all heard the old tale about the Emperor's new clothes. Two scheming tailors decide to exploit the vanity of the Emperor by inventing a fantastic material that only clever...

In the last section we talked about calculating the control limits of a process and we had some formulas and predefined factors to work with. Well, those were by far the simplest tools available to a six sigma-compliant process. We still have some more formulas ahead to help us see where our...

Using Statistical Process ControlPart 2- by Ivan An X bar R chart is used to graph variation of a process. It helps us understand if a process is healthy or not. As you can see in the figure below an X bar R chart,has two axes. However, the X and R are not the axes,they both denominate a section...

In the last article we discussed the XR Charts or rather how to start off a Control Chart. In this section we are going to discuss how we decide where to set the control limits? Well, after all our data falls within the specification limits we’ll use the following formulas for the averages...