Materials research, weighed.
Also called: Material selection · Materials review · Substance sourcing · Material trade-off study
Choosing each material on the properties the job needs, on safety, on cost, and on whether you can actually buy it reliably.
Pick materials on real criteria, not looks. Name the properties the part must deliver, check safety, weigh cost against the bill of materials, and confirm you can source it at volume. There is a worked table below, and a checklist you can run.
What materials research is
Materials research is the work of deciding what each part is actually made from, and being able to defend the choice. For every component you name the job it has to do, then pick the material that does that job best inside your budget and your supply chain. It sounds obvious. In practice most first drafts pick on appearance and back-fill the reasons later.
The honest method runs four questions, in this order, for each part. First, what properties does the job genuinely need: strength, stiffness, thermal mass, food contact, the way it feels in the hand? Second, is it safe for its use, near food and at temperature? Third, what does it cost landed, and what does that do to the bill of materials? Fourth, can you buy it, in your quantities, from a supplier who will still be there next year? A material that wins on the first three and fails the fourth is not a choice; it is a wish.
Why this gets rushed
- The look decides first. Someone falls for a finish, and the brief quietly bends to justify it. The material should serve the job, not the mood board.
- Cost arrives late. Teams spec the ideal material, then discover at the bill-of-materials stage that it doubled the unit cost. I have watched a lovely spec collapse because nobody priced it until tooling.
- Sourcing is assumed. “We can get that” is not the same as “we have a quote, a lead time, and a minimum order we can live with.”
The four criteria, on the proofing box
The clearest way to see the method is to watch it run on real parts. Here is how we worked through the materials for the proofing box, so you can see the shape of a defended choice rather than a generic template.
Notice that no row says “because it looks premium”. The oak looks premium, but it is on the list for handling and a cool outer surface. The look is a welcome by-product of a defensible choice, never the reason for it.
- “This finish photographs beautifully.”
- Spec the dream material, price it never.
- Assume the supplier exists.
- Discover the food-safety problem at certification.
- Properties: name the job the part must do, then match it.
- Safety: confirm food contact and temperature rating up front.
- Cost: price it landed against the bill of materials.
- Sourcing: get a quote, a lead time and a workable minimum order.
How it fits the bigger picture
Materials research is activity 07.10.04 in the framework, inside Stage 07 Engineer. The chosen materials feed straight into mechanical analysis (07.10.05), where the numbers decide whether the stoneware wall, the wood band and the insulation actually survive the loads, the heat and a decade of daily use.
What it can do
It turns “what’s it made of?” into a set of defended decisions: each part matched to the job, cleared for safety, priced against the bill of materials, and confirmed sourceable. It hands the next stage a real list to analyse, not a wish-list.
What it can’t do
It can’t prove the choices work. A material that reads perfectly on properties, safety, cost and sourcing can still fail under real stress or real heat. That is what mechanical analysis and later testing are for; materials research narrows the field, it does not certify the winner.
See the full 10-stage process →
Try it yourself
Take one part of your product. Write the job it must do in one line. List two or three candidate materials. For each, score four things plainly: does it have the properties, is it safe in use, what does it cost landed, and can you actually source it at your volume? The material that wins on all four, not the one that photographs best, is your choice. Where two tie, write down the trade-off you accepted and why.
Want a structured first pass? Start the Free Sprint → and the GPT will help you frame the criteria before you commit.
Your materials checklist
Project notes: the supplier in Stoke-on-Trent
▸ From the notebook · optional reading
How the stoneware body got chosen for the proofing box, and why the sourcing question nearly changed everything we’d decided.
3 min read · click to open
Dan and Anna Hartley had already half-decided the body in their heads: a smart-looking cast metal shell. It would have photographed wonderfully. The trouble was the job. The body’s real task is thermal mass, holding 26°C through a cold kitchen with the heater drawing under 30W, and metal sheds heat fast.
What the properties actually wanted
I asked one question: “What is the body for?” Once we said “to hold heat steadily and touch the dough safely”, stoneware won on properties before cost or looks entered the room. Thermal mass to even out the swings, a food-safe glaze for the surfaces near the dough, and a finish that happens to look like a serious piece of kitchen kit.
Where sourcing nearly broke it
Then the fourth question bit. A bespoke stoneware body needs tooling, and our first quotes put it well above the budget the £38–55 bill of materials could carry. For a fortnight the ceramic body looked dead.
What saved it was a small pottery supplier in Stoke-on-Trent who already ran a similar firing and would amortise the tooling across a sensible first order. We pushed on lead times and minimum quantities until the numbers worked. The lesson stuck: the material was right on three criteria the whole time, but it only became a real choice when the sourcing held up.
— Engineer stage, project notes, 2026
— Next in Engineer → Mechanical analysis