3.1 Supply Chain Inputs: Labeling & Kit Hygiene

The warehouse is the first manufacturing step; logistical chaos at the receiving dock translates directly to unplanned downtime on the SMT line. Precise labeling and shortage management are not administrative suggestions but physical requirements for the operation of automated storage and retrieval systems.

Consigned Kit Requirements

For consigned (customer-supplied) materials, the physical presentation must match the digital BOM.

• Labeling: Every bag or reel must carry a machine-readable label containing the MPN, Quantity, and BOM Line Item / Reference Designator. Handwriting on bags is prohibited.
• Packaging: Components must be supplied in moisture-barrier packaging where applicable. Loose components dumped into a single bag ("bulk") are rejected.
• Attrition (Overage): The assembly process incurs natural loss (leader/trailer waste, pick errors). Minimum overage is required:
  • Passives (0402+): +5% or 50 pieces (whichever is greater).
  • Active ICs: +1% or 2 pieces.
  • Expensive/Large Parts: Exact count allowed (0% attrition).

Shortage Management

The "Clear to Build" (CTB) signal is binary. A kit is either complete or it is not.

• Full Kit Policy: Production does not commence until 100% of BOM lines are present.
• Shortage Builds: Building with missing parts requires a written variance authorization. The missing locations must be masked in the Pick & Place program to prevent machine errors.

Final Checklist