Procurement & Supply Chain / Planning
Supplier Lead-Time Variance ~ (aliases: lead-time variability, delivery reliability spread, LT sigma, CV of lead time)
How much a supplier's actual delivery lead time swings around its average, the spread, not the mean.
The fork, why two teams get different numbers
Whether "lead-time performance" means the AVERAGE or the VARIABILITY, and how the spread is expressed.
In the Metric Library
- The full fork, both definitions worked all the way through
- The trap that makes the number lie, on a real export
- Every formula variant, spelled out
- The reconciliation anchor, what to tie it to and when to refuse
Reference: APICS/SCOR (Delivery Performance, reliability) ยท ISM