Service vs Inventory Trade-off
The service curve flattens past ~46 days of stock - beyond that, holding more inventory buys almost no extra service.
Target service
98%
line-item fill
Sweet spot
~44 days
knee of the curve
Diminishing past
46 days
little benefit
Service vs inventory
Achieved service level as a function of days-of-supply
AI narrative
Why this matters
Service rises steeply with the first ~40 days of cover, then flattens. The 98% target is reached around 44 days; holding past ~46 buys almost nothing. That is why the $1.6M of excess in Replacement Parts (58 days) can be released with no service impact.