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🏭 Running a manufacturer that makes for several industries

A contract shop making parts and assemblies to its customers' drawings — aerospace, medical, industrial, energy, semiconductor and automotive at once: the quote, the certifications, the long-term agreements and the customer mix.

What the market is worth

Factory activity: 54.5% ISM's Manufacturing PMI for September 2026, the ninth month of expansion in a row; new orders 55.3, and prices paid 77.9, up 6.8 points in a month (ISM, October 1, 2026)
Factory jobs: +72,000 since a low in December 2025; +9,000 in September 2026, with machinery and plastics & rubber up 5,000 each, and a 40.6-hour week (BLS, October 2, 2026)
Workers needed: 3.8 million by 2033, with about 1.9 million at risk of going unfilled (Deloitte and The Manufacturing Institute, April 2024)
Small shops: 3 in 4 of the 238,851 US manufacturing firms have fewer than 20 employees (NAM, from the Census Bureau's Statistics of US Businesses, 2021)
Reshoring work: 33% of contract manufacturers were quoting reshoring projects in 2026, up from 16% a year before, and they compete with imports on 38% of their quotes (Reshoring Initiative and Regions Recruiting, 2026 USA Reshoring Survey, September 2026)
Steel, aluminum, copper: Full value Section 232 duties are charged on an imported part's whole customs value since April 6, 2026: 50% if it is almost all metal, 25% for most derivatives, 15% for some industrial and grid equipment through 2027, none at 15% metal or less (White House proclamation of April 2, 2026, via KPMG; revised again June 8)
Defense cybersecurity: Phase 2 paused DoD suspended CMMC's third-party assessments, due November 10, 2026, on July 13 pending a review; self-assessments, SPRS scores and DFARS 252.204-7012 still apply (Federal News Network; WilmerHale, July 2026)
Medical devices: ISO 13485 is written into FDA's Quality Management System Regulation, in force since February 2, 2026; a maker of components isn't covered directly (an accessory counts as a finished device), and customers flow it down in supplier quality agreements (FDA; 21 CFR 820.1)

How it actually grows

Year 0–1 A job shop: quotes, a few machines, anyone's work

A contract shop starts as a job shop: spot orders and prototypes for whoever sends a drawing. The quote is the business. Cost every job from its routing: machine hours at a shop rate that covers the machine, the operator and the overhead, plus material at today's price, outside finishing, inspection and scrap, and keep the quote with the job so you can compare it when the job ships.

Watch out: Quoting from the last job's price. Material, and the duties on it, can move between the quote and the shipment.

Years 1–3 The first certification and the first big customer

ISO 9001 is the base most buyers ask for; aerospace asks for AS9100 and a first article inspection report on new parts, medical devices for ISO 13485, automotive for IATF 16949, and defense work brings ITAR registration and NIST SP 800-171. Each one opens an industry, and the first big customer usually arrives with the first certificate.

Watch out: A first big customer who fills every machine. The work is welcome; a shop with one customer has one decision-maker.

Years 3–5 Long-term agreements and the customer mix

Long-term agreements (blanket orders released month by month at set part prices) bring steady volume and a planning horizon, and they carry the year. Put a material clause and a yearly price review in every one, and grow the next industry before the next customer, so no single customer, and no single industry, is the year.

Watch out: An agreement with no way to move its price. A part priced three years ago ships at three-year-old margins.

Mature Capacity, people and the next machine

Growth comes from the machines you have before the ones you buy: a second shift, quicker setups, and automation on the long runs. Measure OEE on the bottleneck, train your own machinists and inspectors, and buy the next machine for the work you have already won.

Watch out: Buying the next machine before the current ones run a second shift.

What each revenue stream is good for

Revenue stream	Pays	Scales
Long-term agreements (blanket orders) Steady volume and a horizon to plan staff and material against. The price is the risk: write in a material clause and a yearly review, and track which agreements have neither.	Per release, at the agreed part price	Most of the year
Spot orders Priced at today's material and today's capacity. A good spot quote is the best evidence for repricing an agreement.	Per purchase order, quoted each time	Steady
Prototypes and first articles The door to production work. A first article inspection (AS9102 in aerospace) is the proof a part can be made to print, and the reason the production order comes to you.	Per job, small runs	Small, leads to production
Engineering, programming and tooling Fixtures, programs and tooling the customer pays for once. Bill them separately so they aren't buried in the part price and given away on the next order.	One-time charges	Small
Finishing and outside processing Anodizing, plating, heat treating and paint bought from specialists. Mark it up for the handling and the risk, and track their lead times, which become yours.	Passed through, with a markup	Follows the parts
Assembly, kitting and stocking programs Assembling, kitting and holding stock for a customer's releases (kanban, consignment) makes you hard to replace, and ties up your cash; price the carrying cost in.	Per assembly, or a monthly fee	Good

If you're starting this month

Cost every quote from a routing: machine hours at a shop rate that covers the machine, the operator and the overhead, plus material at today's price, outside processing, inspection and scrap. Keep the quote with the job and compare it with what the job actually took.
List every long-term agreement with the date its prices were set, and whether it has a material clause or a yearly review. The duties on steel, aluminum and copper were rewritten twice in 2026 (Section 232, April 6 and June 8).
Know which certification each customer's industry asks for before you quote it: ISO 9001 as the base, AS9100 for aerospace, ISO 13485 for medical devices, IATF 16949 for automotive.
If a part is a defense article, register with the State Department's DDTC before you make it (ITAR, 22 CFR 122.1; the first tier is $3,000 a year), and keep controlled drawings away from anyone not cleared to see them.
For defense work, keep your NIST SP 800-171 self-assessment score posted in SPRS and the annual affirmation current. CMMC's Phase 2 is suspended; Phase 1 and DFARS 252.204-7012 still apply.
Track each customer's share of the year, and each industry's, every month. A customer at 10% or more is the one a buyer, a bank or an auditor asks about first.
Measure OEE on your bottleneck machine for a month before you buy another one. 85% is the textbook figure, most shops run nearer 60%, and the gap is usually setups and waiting.
Start an apprentice or trainee on every shift. The 1.9 million jobs projected to go unfilled by 2033 are mostly the skilled ones a shop runs on.

Before you act on any of this

Export controls (ITAR and the EAR), defense cybersecurity rules (DFARS 252.204-7012, NIST SP 800-171, CMMC), FDA's QMSR for finished medical devices, environmental and safety rules (EPA, OSHA) and the tariffs on steel, aluminum and copper all apply to some parts and not others, and several changed in 2026. Confirm what applies to each part with the customer's flow-down clauses, your registrar, a licensed customs broker and counsel before relying on anything here. AS9100's next revision, renumbered IA9100, was expected late in 2026 or early in 2027 with its transition still unset. Figures carry their sources and their dates. This is general information, not legal/tax advice.

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Guides for this business

Contract manufacturing numbers: the quote, the long-term agreements and the customer mix →

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Figures are sourced from published industry research (IBISWorld, trade associations and regulator data) and are stated with their year. They describe typical conditions, not your situation. This is general information for business owners, not financial, tax, or legal advice.