The Vocabulary Gap Costs First-Time Inventors Real Money

The fastest way to be quoted badly is to nod along. Engineers, factories, and buyers all speak a compressed jargon, and a first-time inventor who does not know what NRE, MOQ, or DVT means cannot tell a fair quote from a bad one — or notice when two quotes are describing completely different amounts of work. This glossary covers the terms you will actually hear in your first year, grouped by where they come up, with plain definitions and the reason each one matters to your budget.

Development and Design Terms

  • PRD / specification — the document defining what the product must do, before anyone decides how. Every serious project starts here; see how to write a product requirements document.
  • Proof of concept (POC) — a crude test that proves the underlying principle works. No enclosure, no finish, no user experience. Its only job is to answer "is this physically possible."
  • Prototype — a built unit for learning or demonstration. The word is dangerously vague: a looks-like model and a works-like unit are different projects with different prices.
  • MVP — the smallest version that lets you learn from the market. In hardware, it means something very different from software, because you cannot ship a half-built physical object and patch it.
  • CAD — the 3D computer model of the product, from which drawings and manufacturing files are derived. Make sure your contract gives you the native source files, not just exports.
  • STEP / STL — the two file types you will be sent constantly. STEP carries real geometry and is what a machinist or molder needs; STL is a triangle mesh suited to 3D printing. The distinction is explained in STL versus STEP file formats.
  • Design freeze — the moment after which every change goes through a formal process. Crossing it too early wastes money; crossing it too late is worse.
  • ECO / engineering change order — the controlled process for changing a frozen design, so that drawings, BOM, and tooling stay in sync rather than drifting apart.
  • Tolerance — the permitted variation on a dimension. Tight tolerances are a direct multiplier on manufacturing cost; specifying them everywhere is a classic beginner expense.

Manufacturing Terms

  • BOM (bill of materials) — the structured list of every part in the product with manufacturer part numbers and quantities. It is the backbone of costing, purchasing, and quality; see the bill of materials guide.
  • DFM (design for manufacturing) — adapting the design to the chosen production process so it is cheap and reliable to make. Skipping it is the most expensive omission in hardware; see design for manufacturing.
  • Tooling — the dedicated molds, dies, and fixtures a process requires. Usually the single largest one-time expense in a project, and paid before you sell anything.
  • NRE (non-recurring engineering) — every cost that does not scale with quantity: tooling, line setup, certification testing, programming fixtures. Always ask a supplier to separate NRE from per-unit price.
  • MOQ (minimum order quantity) — the smallest batch a supplier will run. It changes the entire financial model of a launch and is negotiable more often than people assume; see minimum order quantity explained.
  • Lead time — the elapsed time from order to delivery. For tooling and semiconductors it is measured in months, and it, not engineering, usually sets your real launch date.
  • Pilot run / pre-production run — a small first batch made with the real production process and real tooling, to find problems before you commit to volume.
  • Yield / scrap rate — the share of units that come out acceptable. A low yield quietly raises your true unit cost far above the quoted one.
  • Manufacturing data package — the complete document set that lets any competent factory build your product without asking you questions. Owning it is what keeps you free to change suppliers; see the manufacturing data package.

Commercial Terms

  • COGS (cost of goods sold) — the true per-unit cost to produce a sellable unit: parts, labor, assembly, packaging, scrap, and freight. Not the same as the factory's quoted unit price.
  • Landed cost — COGS plus shipping, duties, tariffs, customs fees, and inland freight to your warehouse. The only cost number that belongs in a pricing decision.
  • Incoterms — standardized three-letter shipping terms (EXW, FOB, CIF, DDP) that define who pays for and bears risk on each leg of transport. Misreading them is a common first-import surprise.
  • Tiered quote — per-unit pricing that changes with order quantity. Always request several quantity tiers; the shape of the curve tells you where your business model has to land.
  • Milestone — a payment or decision point tied to a defined deliverable. Milestone-based contracts are the basis of any healthy relationship with a development partner.
  • IP (intellectual property) — the rights in the invention, the design, and the brand: patents, trade secrets, trademarks, and copyright.
  • Royalty — a per-unit or percentage payment to a licensor, central to the licensing route in which somebody else manufactures and sells your invention.

Quality and Compliance Terms

  • EVT / DVT / PVT — the three build stages on the way to mass production: engineering validation of the design, design validation of durability and compliance, and production validation of the manufacturing process. Large factories organize everything around these; see EVT, DVT, and PVT explained.
  • Golden sample — an approved, signed unit kept as the physical reference for every later quality comparison.
  • FAI (first article inspection) — full dimensional measurement of the first unit off a new process, before production is allowed to continue.
  • AQL — the statistical sampling standard used for inspecting a finished batch, defining how many units are checked and how many defects are acceptable.
  • IP rating — a two-digit scale for dust and water resistance, such as IP67. Widely misquoted in marketing, and unrelated to intellectual property despite the shared initials.
  • FCC / UL / FDA / CPSC — the US regulatory acronyms you will meet: FCC for anything that emits radio energy, UL and similar labs for electrical safety marks, FDA for medical devices and food contact, CPSC for consumer product safety and children's products.
  • RoHS / REACH — restrictions on hazardous substances in materials and electronics, mainly driven by European rules but demanded by buyers everywhere.
  • CoC (certificate of conformity) — the supplier's written statement that a shipment meets the agreed specification. Ask for it at goods receipt, not later.

How to Use This List

Keep it open during supplier calls, and do two things with it. First, when someone uses a term you cannot define, stop and ask — nobody competent minds, and the ones who do mind are telling you something useful. Second, when you read a quote, translate it into these words yourself: what is NRE, what is per-unit, at what MOQ, with what lead time, through which build stages. Two quotes that look far apart usually differ in scope, not price, and this vocabulary is how you see it. For the rest of the journey, start with our first-time inventor guide.

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