Drilling Consumables in Production: From First Order to a Stable Supply

What Changes After the First Order

Until the first order, drilling consumables are a quotation: monthly hits, yield factor, MOQ, lead time, payment. From the first production run, the same numbers become measurements — hit count actually achieved, burr rate actually produced, position deviation actually held — and the purchase plan either matches them or starts leaking. The procurement arithmetic does not change at the dock: the unit price on the quote only holds if the hit count on the line holds. The ramp period is where a consumption plan gets corrected against reality, and it is much cheaper to correct it in week one than in quarter three.

Verification SOP for the First Production Run

The SOP is measured on panels and pallets, in the order they arrive:

1. Lot conformance. Thickness, format and pallet quantity against the PO — HDF 2.0 or 2.4 mm, melamine composite 2.5 or 2.7 mm, aluminum base per the alloy line — plus COA and batch identifiers filed against the PO number.
2. Hit count on the line. Tool life achieved against the figure the volume plan assumed; this is the single number that re-prices the whole material choice.
3. Defect panel. Burr rate, smear, hole-wall quality against the sample-phase baseline — the defect list is what chose the material, so the same list verifies it.
4. Position deviation. Against the stack-height and flatness assumptions the process side set.
5. State on arrival. Warp, edge damage and moisture state — the handling defects that masquerade as process problems later.

Ramp: From Pilot Panels to Mass Production

Run the first production lot on one drilling line with the SOP above, compare the measured hit count and defect rates against the plan, then widen to the remaining lines when the first line holds. Two materials ramp as one program: entry board and backup board arrive in the same drill cycle, so ramping one without the other changes the process window you are measuring. The defect-to-material logic is in the defect prevention guide, and it is the same list at ramp time as at selection time.

Keep the first deliveries segregated in the record. A defect that appears on line three in week two is diagnosable only if the record can say which pallet was on the machine — which press run, which shipment, which purchase order.

Delivery Schedule: Two Materials, One Plan

The delivery schedule is the operational half of the one-purchase principle: both materials on one schedule, driven by the same monthly panel and hit figures. The production lead time is about one week and weekly shipping capacity runs to four containers, so the binding constraint is the reorder point, not the factory. Combined containers are the normal plan — entry and backup board palletize together, and the MOQ structure (100 sheets on 940 × 1245 mm, 200 on 520 × 620 mm) is set per material, so the smaller consumer of the two formats sets the pace.

Each shipment is booked against the schedule and recorded against the purchase order. When a defect investigation or a unit price review comes, that record is the file both sides open first — and it is what tells you when the schedule itself, not the material, is the problem.

Repeat Orders and Re-Quote Triggers

A repeat order references the locked specification instead of restating it; restating is how a repeat order arrives as a different product at a different price. Payment stays on the standard 30% deposit with the order acknowledgement and the balance before shipment, and production scheduling is reserved from the acknowledgement and the deposit — a late order pushes the shipment through the scheduling queue, not the lead time.

Re-quote on triggers: a hit-count assumption that no longer matches the line, a format or grade change, an annual volume step that moves the price tier, or a metal-market move on any aluminum-linked line. Between triggers, hold the price and the spec — a stable schedule is what lets the supplier reserve press-run capacity for you.

From Repeat Orders to Standing Volume

When repeat orders have run cleanly for several quarters, the arrangement graduates to a standing schedule with agreed monthly volume and fixed delivery slots. The storage, reorder and expansion discipline of that stage is in the standing supply and reorder guide. The ramp file — inspection records, hit-count trends, shipment records — is the evidence that agreement is written on, and the cost-per-good-hole baseline it protects is the one from the cost-per-hole guide.