Give them a bit more time and they may reinvent SPC charts. :) https://en.wikipedia.org/wiki/Statistical_process_control https://en.wikipedia.org/wiki/Statistic

Give them a bit more time and they may reinvent SPC charts. :) https://en.wikipedia.org/wiki/Statistical_process_control https://en.wikipedia.org/wiki/Statistical_process_control [sounds harsher than it should be, it seems like solid engineering to do this]