OTIF is the metric that decides next year's contract, and the way most Tier-1 plants track it is by reading the OEM's own scorecard on Monday. By the time you see the dip, the shipment that caused it has already arrived late, the customer has already logged the penalty, and the only thing left is to explain it.
The signals were there. The carrier rescheduled the pickup on Tuesday. Finished goods were short by 8 units on Wednesday. The customs broker held the export documents until Thursday afternoon. Nobody connected the three in time, because nobody was watching the three together.
Your account manager spends Monday morning writing apologies for misses that a quieter system could have prevented, while the planner who actually could have acted only saw two of the three signals — and not the one that mattered.