Grounding SMT Setup Delays and Attrition Limits in Assembly Agreements
Assembly agreements define line setup boundaries and package specific attrition limits to prevent unexpected downtime surcharges and inventory deficits.
Consigned Inventory Scrap Audit
Material Reconciliation
Formal reviews of production losses determine the financial and material liability for unused or damaged components provided by an original equipment manufacturer. Engaging in a consigned inventory scrap audit allows both the electronics manufacturing services provider and the client to reconcile physical component counts with assembly logs. This procedure verifies that the amount of material lost during setup and placement falls within agreed contract allowances.
Discrepancies identified during this phase are quantified to adjust the balance of the customer-owned inventory held at the factory.
Variance Verification
Physical verification requires checking solder reel tails, rejected components in feeder bins, and empty carrier tapes. Scan logs and feeder counts confirm part numbers before comparison with machine files. This review ensures that losses represent genuine assembly fallout rather than inventory discrepancies.
Process Improvement
Standard manufacturing agreements establish a baseline scrap rate for passive and active components during high-speed surface mount assembly. When a consigned inventory scrap audit reveals losses that exceed these limits, engineers initiate root-cause analysis on the SMT line. High scrap rates often point to worn nozzle tips, misaligned feeders, or poor board registration.
Fixing these issues reduces component waste in subsequent runs, protecting the margins of both the client and the manufacturer.