What it shows
A waterfall from the comparison period's total cost to this period's, with one bar per bucket, plant or process for what it added or removed.
Why it matters in manufacturing
It explains a change in total cost. Management usually asks why the number moved, and the bridge answers with the contributions.
How to read it
Red bars added cost, green bars removed it; together they make up the difference between the two totals. Change the grouping to see the plants or processes behind the change.
What good looks like
Green bars in the failure buckets that are larger than any red bars, so the period ends lower than it started.