bom-cost-review

# BOM Cost Review Skill A BOM is a list of promises: that each part will be buyable, at that price, at your volume, for the life of the product. This skill reviews a BOM the way a sourcing veteran does — Pareto the cost, flag the single-source and end-of-life traps before they become line-down events, and separate real cost-down candidates from wishful thinking. ## What This Skill Produces - A cost rollup by commodity class with % of total - Top-10 cost drivers (they usually carry 70–80% of BOM cost) - Risk flags per line: single-source, lifecycle (EOL/NRND), MOQ mismatch, long lead time - A prioritised cost-down candidate list with realistic savings and effort - Tariff and logistics sensitivity notes ## Required Inputs Ask for these if not provided; work with a partial BOM if that's all there is, labelling gaps `[missing — request from EE/sourcing]`: - **The BOM** — part numbers, descriptions, quantities, unit costs (any format; structure it) - **Annual forecast volume** — needed for MOQ math and price-break realism - **Target BOM cost** — what "good" looks like - **Sourcing detail if available** — approved vendors, country of origin, lead times, lifecycle status - **Product stage** — EVT-stage BOMs get design-out suggestions; MP-stage BOMs get negotiation/resourcing ones ## Review Framework **1. Rollup.** Group into commodity classes (PCBA/semiconductors, passives, display, battery, mechanicals/enclosure, cables & connectors, packaging & accessories). Show cost and ...