September rain on Vibhavadi Rangsit can hold a truck between a yard and a receiving door for an afternoon that never appears in the supplier’s promise. If that afternoon is drawn as a supplier miss, the rhythm review punishes the wrong name.
We ask clients to keep a small weather-and-road note for days when a truck left on time and arrived late. It does not need to be literary. “Flooded near Lak Si, arrived 16:40, left the yard 11:10” is enough. In a Supplier Rhythm Review last year, four of a workshop’s “late” arrivals were this kind of afternoon. The supplier’s window, measured at the yard gate, had been kept. The door in Talat Bang Khen saw only the late knock.
The chart then carries two arrivals: yard gate and your door. Rain sits as a mark on the road between them, taken from your note, not from a forecast. We will not invent a storm because the month was September.
If you want the paper to defend a supplier who was on time at the gate, keep those notes. Bring them with the promise file. A window that ends at your door is a different promise from a window that ends at the yard, and the sheet should say which promise you actually bought.