kordas, Autor w serwisie OpEx Group

Jul

By kordas Best Practice, Six Sigma No Comments

What really wins the Tour de France – man or technology?

Every major technological innovation promised a faster Tour de France. The data tell a more interesting story. If technology is the main driver of performance, why did nearly two decades of innovation leave the average winning speed almost unchanged? I analysed the average speed of each Tour de France winner using data from ProCyclingStats. The […]

By kordas Best Practice, Six Sigma No Comments

Most 8D, A3 and DMAIC reports describe problems very well. Far fewer actually discover confirmed cause

💡 Why do so many Root Cause Analyses fail to identify the real cause? In many organizations, chronic process problems are still investigated using: brainstorming fishbone diagrams 5 Whys process mapping FMEA correlation analysis expert opinions comparisons between “good” and “bad” parts All of these approaches can generate hypotheses. But hypotheses are not knowledge. Most […]

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Case study – DoE in steel stamping process

The process of stamping stainless steel housing components for large household appliances had a very high level of waste. Numerous optimization measures were taken, but the average reject rate remained around 20%, and the variation between subsequent production shifts was very high. While nearly flawless production runs were observed, there were also those with defects […]

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Process Capability Analysis: How to calculate Cp, Cpk, Pp, Ppk (Capability & Performance Indexes)

How to calculate Cp and Cpk (Capability indexes)? The Cp index is a fundamental measure of process capability. It compares customer requirements – the Voice of the Customer (VoC) to the variation of the process being analyzed – the Voice of the Process (VoP). The Voice of the Customer is typically expressed by the Specification […]

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DOE case study – example of fractional factorial design analysis

Gravity Casting of Aluminum Brake Calipers – Reduction of a Rare Surface Defect Using DOE The manufacturer of aluminum brake calipers was in the final phase of designing the casting process of a new caliper. Serial production was taking place on two semi-automatic prototype machines and on one fully automatic casting line. Ultimately, the prototype […]

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From apparent knowledge to conscious ignorance

What Deming really meant Deming observed that the greatest barrier to improvement is not a lack of knowledge, but the belief that we already have it. Organizations operate for years in a state he called apparent knowledge – a set of practices, procedures, and beliefs that “work” because the system has not yet collapsed. Results […]

kordas

What really wins the Tour de France – man or technology?

Most 8D, A3 and DMAIC reports describe problems very well. Far fewer actually discover confirmed cause

Case study – DoE in steel stamping process

Process Capability Analysis: How to calculate Cp, Cpk, Pp, Ppk (Capability & Performance Indexes)

DOE case study – example of fractional factorial design analysis

From apparent knowledge to conscious ignorance

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