09/01/2026
You're lying to your own planning system. ๐จ And that average lead time? It's the culprit.
Supplier delivers in 5 days. Then 7. Then 6. Then suddenlyโฆ ๐ฅ 15 days.
Planner sets lead time = 8 days in SAP IBP and moves on.
The system now believes supply is a metronome. โฑ๏ธ Reality is a heartbeat โ irregular, unpredictable, occasionally alarming.
Here's what that one ""harmless"" number actually costs you ๐
๐ Stockouts when delays hit โ your safety stock never saw them coming ๐ฆ Bloated inventory when planners overcompensate ""just in case"" ๐ Endless replanning, expediting & manual overrides โ ๏ธ Eroded system trust โ and once that's gone, good luck getting it back ๐ธ Service levels drop. Working capital climbs. CFO asks questions.
Here's the uncomfortable truth:
Lead time is not a number. It's a distribution. Min. Max. Mean. Variability. Supplier reliability over time.
The fix isn't glamorous โ but it works โ
โ Update lead times from actual receipts (not what someone entered in 2019) โ Plan with lead time variability, not just the average โ Align safety stock with real supplier behavior โ Make it dynamic โ review monthly, not ""whenever someone complains""
Better algorithms won't save you if your master data lies. ๐ฏ
Planning with data that reflects reality > planning with data that reflects wishful thinking.
๐ฌ When did you last review lead time variability for your top suppliers? Drop your honest answer below ๐