One of the most often witnessed symptoms of Lean Management that I come across nowadays are whiteboards with performance indicators. These serve as one of the central elements in weekly (or when I’m lucky, daily) huddles that are so fashionable nowadays. Now of course a lot of good things can actually be said about these huddles and indicators when done correctly. However, there are some risks in using these type of representations as well, as for instance Mark Graban rightfully wrote about last August in his blog when discussing the use of charts. You can also read more on correctly interpreting data on charts using Statistical Process Control (SPC) on my own blog, while writing on climate change. But even if applied correctly, I think there is a more structural issue with concentrating too much or even solely on these type of charts. (more…)