What it shows
Failure cost (internal and external) per plant and month as coloured cells, from light (low) to dark (high).
Why it matters in manufacturing
Hotspots and bad months that come back stand out at a glance, such as a plant that struggles every summer or after a product launch.
How to read it
Look for dark rows (a plant with lasting failure cost) and dark columns (a month that was bad everywhere, pointing to a shared cause such as a material batch or a supplier).
What good looks like
Light cells across the grid, with no dark row or column that keeps coming back, and a year that is lighter than the year before.