The Production Equation · Appendix C

Manufacturing glossary

102 terms, defined the way the book uses them.

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45X: The Inflation Reduction Act's advanced manufacturing production credit: a fixed amount for each eligible clean-energy component made in the United States and sold, such as $35 a kilowatt-hour for battery cells. The law of 4 July 2025 ended it for wind components sold after 2027, kept the solar and battery phase-down (75% in 2030, 50% in 2031, 25% in 2032) and added foreign-entity limits.
48D: The investment tax credit for chip fabs created by the CHIPS Act, 25% as enacted and 35% for property placed in service after 2025 under the law of 4 July 2025, with no credit for property whose construction begins after 31 December 2026.
80/20: Illinois Tool Works' process of concentrating effort on the customers and products that earn the most, and simplifying or pruning the rest.

A

Absorption costing: The method US accounting rules require for inventory, in which a period's fixed production cost is spread over the units made, so fixed cost carried in unsold units stays on the balance sheet; producing for inventory can therefore flatter reported profit.
Accounting quantity: In program accounting, the block of aircraft over which a manufacturer estimates total revenue and cost and books the same margin on each unit.
Aftermarket: The parts, service, overhaul and upgrades sold for products already in use, often more profitable than the original sale.
Airworthiness directive: An FAA order requiring inspection, repair or modification of aircraft or engines, which can ground a fleet.
Andon: A cord or signal, part of the Toyota system, with which any worker can stop the line at a defect.
Anti-dumping and countervailing duties (AD/CVD): US duties on named products from named countries, often at rates for each exporter, to offset sales below fair value or foreign subsidies; hundreds of orders are in force under the Tariff Act of 1930.
AS9100: The quality-management standard for aerospace, a sector version of ISO 9001.
Availability: In OEE, the share of planned time a line actually runs.

B

Backlog: Orders received but not yet delivered; it may include options and letters of intent as well as firm orders, and its reported size depends on accounting rules.
Blast furnace: The furnace of an integrated steel mill, about 30% of US output, that reduces iron ore with coke to liquid iron, which a basic oxygen furnace then makes into steel; costly to bank and restart.
Break-even utilisation: The share of capacity at which a plant's contribution just covers its fixed costs: fixed cost divided by contribution a unit, divided by capacity. It rises when prices fall.
Build-to-print: Manufacturing to a customer's drawings, as opposed to a supplier that designs the part or product itself.

C

Capacity: The output a plant can make in a period under stated assumptions: nameplate (the design output running continuously), demonstrated (the most sustained in practice) or planned (on stated shifts and mix).
CBAM: The EU's Carbon Border Adjustment Mechanism, in its definitive phase from 1 January 2026: importers of steel, aluminium, cement, fertilisers, hydrogen and electricity owe certificates for embedded emissions as free allowances to EU producers end by 2034.
Chapter 11: The US bankruptcy procedure under which a company reorganises or sells its business under court supervision while continuing to operate.
Chiplet: A smaller chip combined with others in one package by advanced packaging, used instead of one large die to reduce the yield penalty of die area.
CHIPS Act: The CHIPS and Science Act of August 2022, which created fab grants, the 48D credit and loans; grants moved from a preliminary memorandum of terms to a final award to disbursement against milestones.
Clawback: A provision requiring a company to repay public support if it misses commitments on jobs, investment, output or timing.
Conglomerate discount: The observation that a diversified company is often worth less than the sum of its parts as focused companies; the usual case for a break-up.
Consent decree: A court-enforced agreement, in this book chiefly with the FDA and the Department of Justice, that can halt production until an independent expert certifies a plant.
Contract manufacturer: A company that makes products brand owners design and sell; in pharmaceuticals, a contract development and manufacturing organisation.
Contribution: Price less variable cost a unit: what each extra unit sold adds towards fixed cost and profit.
Copy Exactly!: Intel's policy of replicating a fab's process identically across sites, to remove process novelty from a new fab's ramp.
Cpk: A process capability index: the distance from the process mean to the nearest tolerance limit in units of three standard deviations. A centred process at 1.33 produces about 63 parts per million out of tolerance.

D

Defeat device: Software or hardware that makes a product behave differently under a regulatory test than in use, as in Volkswagen's diesel engines.
Defect density: In chipmaking, the number of killer defects per square centimetre of wafer; yield falls steeply as it and die area rise.
Deferred production costs: Under program accounting, the excess of early units' actual cost over the block's average cost, carried as an asset and drawn down as later, cheaper units are delivered.
De minimis: Duty-free treatment of low-value imports, ended for China and Hong Kong on 2 May 2025 and suspended for all countries on 29 August 2025.
Direct-reduced iron (DRI): Iron made by reducing iron-ore pellets with natural gas or hydrogen in a shaft furnace without melting them, then melted in an electric arc furnace.

E

Electric arc furnace (EAF): A furnace that melts scrap, often with pig iron or direct-reduced iron, by an electric arc; the basis of the minimill and of about 70–72% of US steel output.
Escape: A defect that passes every check and reaches a customer, usually counted in parts per million.

F

FAA: The Federal Aviation Administration, which certifies aircraft types and production, oversees each manufacturer's production certificate, issues airworthiness directives and can cap a production rate.
First-pass yield: The share of units that pass every test the first time, without rework. Final yield counts units that pass after rework.
First production: The start of production, which carmakers call SOP, usually at low volume and high cost; distinct from groundbreaking and from volume.
Fixed cost: Cost that does not change with output in the short run, such as depreciation, salaried staff and maintenance.
Form 483: The form on which FDA investigators record observations at the end of a plant inspection; it can be followed by a warning letter, an import alert or a consent decree.
Foundry: A chipmaker that makes chips designed by others; a pure-play foundry, such as TSMC, makes no chips of its own design.

G

Golden share: A government holding that carries vetoes over specified decisions, as at U.S. Steel from 18 June 2025, over moving its headquarters, changing its name, idling or closing plants, cutting production and relocating jobs.
Groundbreaking: The ceremonial start of construction, often reported as if it were production.

H

Hidden factory: The inspection, rework and repair work of a plant that does not appear in its planned process but consumes labour and capacity.
Hot-rolled coil (HRC): The benchmark flat-rolled steel product, priced in the United States in dollars a short ton.

I

IATF 16949: The quality-management standard for automotive suppliers, a sector version of ISO 9001.
IEEPA: The International Emergency Economic Powers Act, basis of the broadest US tariffs of 2025; on 20 February 2026 the Supreme Court held, 6–3, in Learning Resources v. Trump that it does not authorise tariffs, and refunds followed.
Installed base: The products a manufacturer has already sold that remain in use, the source of its parts and service revenue.
Integrated device manufacturer (IDM): A chipmaker that designs and makes its own chips, such as Intel historically, Samsung, Texas Instruments and Micron.
ISO 13485: The quality-management standard for medical devices, incorporated in the FDA's Quality Management System Regulation in effect from 2 February 2026.
ISO 9001: The general international quality-management standard; it certifies that a system exists and is followed, not that a plant is good at making things.

J

Jidoka: The Toyota principle, from Sakichi Toyoda's self-stopping loom, of stopping a machine or line at a defect so that no bad output is made.
Just-in-time: Making only what is needed, when it is needed, with little inventory; one of the two roots of the Toyota system.

K

Kaizen: Continuous improvement, often through short, focused improvement events.
Kanban: Cards or signals that let a process make only what the next process has used.

L

Learning curve: The fall in unit cost as cumulative output rises. On an 80% curve each doubling of cumulative output cuts unit cost by a fifth.
Lights-out: A claim that a factory or cell runs without people; it usually describes some hours of some cells.
Long-term service agreement: A contract under which an engine or turbine maker maintains its product for the customer and is paid by the hour flown or run, as in Rolls-Royce's TotalCare; its profit depends on the durability assumed in its price.

M

Metal spread: The steel price less the raw-material cost of making it: for a minimill, hot-rolled coil less scrap.
MFN duty: The normal most-favoured-nation rate in a country's tariff schedule, mostly 0–5% on US industrial inputs.
Minimill: A steel mill built around an electric arc furnace that melts scrap, with a fraction of an integrated mill's fixed cost per ton.

N

NHTSA: The National Highway Traffic Safety Administration, the US vehicle-safety regulator, which oversees vehicle recalls; press tallies of its data give carmakers' recall counts.
Node: A generation of chip process technology; a fab's capacity is stated in wafer starts a month at a stated node and wafer size.

O

OEE: Overall equipment effectiveness: availability times performance times quality; useful for improving one line, nearly useless for comparing companies with different definitions.
Operating leverage: The sensitivity of operating profit to volume that a high share of fixed cost creates.

P

Pattern bargaining: The UAW's practice of settling with one of the Detroit Three and pressing the same terms on the other two.
PBGC: The Pension Benefit Guaranty Corporation, the US government's insurer of private defined-benefit pension plans, which took over Bethlehem Steel's plan.
Performance: In OEE, actual output as a share of what the ideal rate would have produced in the running time.
PFAS: Per- and polyfluoroalkyl substances, chemicals with carbon–fluorine bonds that do not break down in the environment; the subject of 3M's exit from their manufacture and its water-system settlement.
PPAP: The Production Part Approval Process, through which an automotive supplier demonstrates that its production process makes a part to specification before shipping.
Price floor: A guaranteed minimum price, often paired with an offtake contract, as in the Pentagon's 2025 deal with MP Materials.
Process capability: The ability to make a product right, safely and repeatably at the required rate; the second factor of the production equation.
Production certificate: The FAA approval that allows a manufacturer to build aircraft of a certified type on a production line.
Program accounting: The method US accounting rules allow aircraft makers, which spreads the estimated revenue and cost of a block of aircraft evenly across the block, so that early units' excess cost is deferred.

Q

Quality: In OEE, good output as a share of total output; more broadly, conformance to specification and fitness for use.

R

Rate: The number of units, especially aircraft, a programme completes each month; a rate break is a planned step up or down.
Reach-forward loss: Under program accounting, the whole expected loss on a block, booked at once when its estimated cost exceeds its estimated revenue.
Recall population: The vehicles or units that may contain a defect; traceability decides its size, and counts may be of vehicles, components or campaigns.
Reverse Morris Trust: A tax-efficient structure that pairs a spin-off with a merger.
Rolled throughput yield: The product of the first-pass yields of every step of a process, always lower than the average step yield.
Rules of origin: The tests that decide whether a good counts as made in a trade-agreement country and so qualifies for its preferences.

S

Section 122: The balance-of-payments provision of the Trade Act of 1974, limited to 150 days, under which a 10% global tariff applied from 24 February to 24 July 2026.
Section 201: The safeguard provision of the Trade Act of 1974, which gives temporary relief after the International Trade Commission finds serious injury, as for washers and solar in 2018.
Section 232: The national-security authority for US duties on steel and aluminium (25% and 10% from 23 March 2018, both 50% from 4 June 2025), copper, vehicles and parts, trucks, advanced chips and other goods.
Section 301: The Trade Act authority for action against unfair practices: the China lists of 2018–19 at 7.5–25%, and the forced-labour regime from 24 July 2026 at 10% for 19 economies and 12.5% for 41, with USMCA-qualifying goods exempt and Section 232 goods excluded.
Shop visit: An engine's removal from the aircraft for overhaul.
Six Sigma: A statistical method for cutting process variation, developed at Motorola and adopted company-wide by GE in the 1990s, with trained Green Belts and Black Belts.
Spin-off: The separation of a business into an independent listed company whose shares go to the parent's shareholders; the separation agreement decides which liabilities move with it.
Stand-up strike: The UAW's tactic, from 15 September 2023, of striking selected plants of each Detroit Three company and adding plants in stages rather than calling a national walkout.

T

Takt time: The pace at which a line must complete units to meet demand: available time divided by units required.
Time on wing: The hours or cycles an engine runs between shop visits; when it falls short of plan, a service contract can turn from profit into loss.
Tool-in: The installation of production equipment in a completed fab.
Toyota Production System: Toyota's system of just-in-time, jidoka, levelled production, quick changeovers, standard work and continuous improvement, from which the American business systems descend.
Traceability: The ability to trace a shipped unit back to its materials, line, shift and process data, and forward to its customers; it decides the size of a recall.
Transferability: The right to sell a tax credit, such as 45X, to an unrelated buyer for cash.
Type certificate: The approval by the FAA, or in Europe EASA, of a new aircraft or engine design.

U

UAW: The United Auto Workers, the union that represents production workers at the Detroit Three and other plants.
USMCA: The United States–Mexico–Canada Agreement, whose rules of origin decide which North American goods enter duty-free; at its 1 July 2026 joint review the United States declined to confirm its 16-year extension.
Utilisation: Output divided by capacity; its value depends on which capacity is the denominator, and the Federal Reserve's industry measure differs from a company's nameplate figure.

V

Variable cost: Cost that rises with each unit made, such as materials, direct labour and energy.

W

Wafer: The silicon disc, usually 300 mm in a leading fab, on which chips are made; fab capacity is counted in wafer starts a month.
Warning letter: An FDA letter citing significant violations, which can block new product clearances until the problems are fixed.

Y

Yield: The share of units, or of chips on a wafer, that work; see first-pass yield.