Jul 18 2024
What is Quality?
Professionals working on quality don’t usually discuss what it is. Instead, they assume a shared understanding that often isn’t there. Individuals with training in different approaches generalize from different experiences and talk past each other. In meetings, these divergent views are often not aired; in the uninhibited environment of social media, on the other hand, they often degenerate into insults and personal attacks. Let’s try and address this foundational issue.
Jul 21 2024
Rankings and Bump Charts
Hectar’s Audrey Bourolleau and Francis Nappez presented their findings about greenhouse gas emissions in the industrial production of bread baguettes at the 2024 Lean Summit in France. They see a major impact in (1) farming and (2) the production of fertilizer and plant protection products. Together, these categories account for 58% of total emissions but barely 6% of the costs. This suggests that improvements in these two areas could cut emissions in half with a minimal impact on bread prices.
This is about the visualization of this kind of information with bump charts/slopegraphs. Edward Tufte prefers slopegraph but bump chart is more common.
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By Michel Baudin • Data science • 2 • Tags: Bump chart, Slopegraph, Visualization