Quote breakdown: Materials + Labor + Tooling (Source: PCBInsider). Golden Rule: Materials account for 40–65% (Source: PCBInsider); Core Factor: Labor accounts for 25–45% (Source: PCBInsider); Note: NRE (Non-Recurring Engineering) costs are easily overlooked (Source: TeleWire).
I.
Material Costs
Proportion: Materials 40–65% (Source: PCBInsider); Copper Price: Copper accounts for ~50% of harness cost (Source: Alibaba); Components: Cables, connectors, and tape (Source: Alibaba); Terminals: $0.07–0.14 per unit (Source: Made-in-China); Specifications: Wire gauge determines material quantity (Source: Alibaba)—Key points: 40–65% material share, copper prices, and terminals.
II.
Labor Costs
Proportion: Labor 25–45% (Source: PCBInsider); Processing: Cutting, stripping, and crimping (Source: SpecForge); Terminal Count: Number of terminals dictates labor time (Source: Infinite); Manual Work: Manual routing for complex harnesses (Source: TeleWire); Region: Asian labor rates $4–12/hr (Source: Hooha)—Key factors: 25–45% labor share, terminal count, and manual assembly.
III. Tooling & Molds
NRE: NRE accounts for 5–15% (Source: PCBInsider); Molds: Custom molds and crimping jigs (Source: TeleWire); Amortization: Tooling amortization at $3.2/unit (Source: TONFUL); Warning: Unexpected NRE costs can be a shock (Source: TeleWire); Optimization: Cost dropped 34% from $2.1 after optimization (Source: TONFUL)—Molds: 5–15% + NRE + Amortization (three key points).
IV.
Testing & Quality Control
Share: Testing & QC account for 3–8% (Source: PCBInsider); Full Inspection: Continuity and withstand voltage testing (Source: Industry practice); Burn-in: Full inspection and burn-in after assembly (Source: Industry practice); Management: Management fees of 8–15% (Source: PCBInsider); Compliance: Rising certification and compliance costs (Source: Alibaba)—Testing: 3–8% + Full Inspection + Management (three components).
V.
Batch Effects
100 Units: Small batches of 100 units are expensive (Source: TeleWire); 1,000 Units: Automation reduces costs for 1,000 units (Source: TeleWire); Automation: Enables automated processing (Source: TeleWire); Unit Price: Significant drop in unit price (Source: TeleWire); Prototype: Prototype cost $300–500 (Source: Hooha)—Batching: 100 → 1,000 + Automation + Cost Reduction (three effects).
VI. Quote Verification
Breakdown: Structured breakdown to prevent bundling (Source: Cloom); Hidden Costs: Easily overlooked (Source: Cloom); BOM: 20% reduction via BOM optimization (Source: TONFUL); Labor Hours: Reduced from 6.5 to 4.2 hours (Source: TONFUL); Negotiation: Potential for 15–40% reduction (Source: Cloom)—Verification: Breakdown + Hidden Costs + BOM (three-step process).
VII.
Procurement Recommendations
First, analyze the structure (materials, labor, molds); second, check copper prices (pass-through mechanism); third, verify terminals (quantity determines labor); fourth, inquire about NRE (mold costs);
fifth, compare batch sizes (starting at 1,000 units)—Wire Harnesses: Materials + Labor + Molds (three core elements).
