Professor DEMING on his Funnel
Prof. Deming's video on his funnel does not demonstrate his funnel experiment, despite it being very powerful. He talks about it and shows a funnel but he only draws a representation of what the results might look like. The reason is that the experiment is slow and very clumsy. Deming did not use the experiment in his lectures.
Dr NEAVE
Dr Henry Neave in his excellent free course "12 Days to Deming", Day 3, attempts to address the difficulty in using the funnel by using a linear numbered track, a pair of dice and a conversion table. https://lnkd.in/ghDpPu5U
It is far less clear what is happening than with the funnel and still slow and cumbersome.
FUNNEL APP
Our Interactive 3D Augmented Reality Funnel addresses all the problems. Balls can be dropped manually or automatically, allowing rapid collection of data. The funnel is moved automatically for each of the 3 tampering modes. Histograms and control charts (Process Behavior Charts) are also drawn automatically.
EXPOSING MISUNDERSTANDINGS
Our Interactive 3D Augmented Reality Funnel also exposes many common misunderstandings. It shows that normality is NOT required for Process Behavior Charts. It shows how a skewed, non normal histogram has no impact on the Process Behavior Chart.
Our app shows that outliers do NOT needed to be removed to calculate control limits. Dr Wheeler has shown that outliers should not be removed in calculating limits.
KEEP IT SIMPLE. b>Our app demonstrates that XmR is all you need to detect the assignable causes of the tampering modes 2, 3, 4.
BEST EFFORTS
Professor Deming's Funnel shows how best efforts can make things worse. A thorough understanding of variation is essential to improve Quality.
It is human nature to try to fix things when they are off target. For example, if inventory runs low one year, in the following year, the natural impulse is to increase inventory. This is tampering. It can make things worse in the following year. We must understand the nature of the variation in order to improve.
Focusing on defect counts and the specification can make things worse. Defects based approaches such as Conformance to Specifications, Six Sigma and Zero Defects, Quality 4.0/5.0 are red flags to a lack of understanding of variation. Such methods fail to even attempt to teach an understanding of variation. The creator of Six Sigma for example, did not teach Process Behavior Charts and instead taught how to use what he called "smoke and mirrors". Many disasters ensued.
The Deming Funnel teaches a great many aspects of good Quality.
by Dr Tony Burns BE (Hon 1) PhD (Chem Eng)