Most founders with a margin problem go back to the factory. The evidence says redesigning the product is the bigger lever, and here is what it actually saves.
Every founder with a margin problem goes to the same place first. Back to the factory, asking for a better price.
It makes sense. The quote is the only cost number you can actually see. It arrives in writing, it has a dollar figure on it, and there is a person on the other end you can negotiate with.
The trouble is that by the time you are negotiating, a lot of your cost has already been decided. Not by the factory. By you, months earlier, when you signed off the design.
Here is the honest version with the numbers attached. When Hewlett-Packard engineers David Meeker and F. James McWilliams documented three structured cost reduction programmes, swapping components out delivered between 0.7 and 17.7 percent of total product cost. Renegotiating the price of components they had already specified delivered between 1.3 and 2.8 percent. Changing what the product was made of beat changing what it cost to buy, on every single product.
The 80 percent rule is shakier than it sounds
You will see the claim everywhere. The first five percent of design effort locks in 75 to 85 percent of a product's cost. It turns up in manufacturing software marketing, in design agency pitch decks, and in a great deal of advice aimed at founders.
In 1993, two researchers at MIT Sloan went looking for the evidence behind it. Karl Ulrich and Scott Pearson published a working paper with the unglamorous title Does Product Design Really Determine 80% of Manufacturing Cost? Their answer, roughly, was no.
They traced the figure back to its sources and found very little holding it up. One widely quoted 70 percent number came from a Ford study that a Ford employee later described as just an informal survey. An 80 percent figure attributed to Rolls Royce referred to cost reduction opportunities, not to total cost.
Then they tested it properly. They costed 18 automatic drip coffee makers across six manufacturing scenarios at a million units a year. Well run plants and badly run plants, low cost and high cost environments. The cost spread caused by design differences came out slightly smaller than the spread caused by the manufacturing system itself.
So no. Your design does not determine 80 percent of your cost. Anyone who tells you it does is quoting a slogan, not a study.
What the same research says you should actually do
Here is where it gets interesting, and where most people stop reading before the useful part arrives.
Ulrich and Pearson ran one more comparison. They took the most expensive coffee maker in the study, a Krups model, and priced it under different combinations. Built in a poorly run plant in a high cost environment, it came to 14.54 US dollars a unit. Redesigned, built in a well run plant in a low cost environment with better operating practices, it came to 4.98.
Their conclusion was not that design is everything. It was that redesign is often a more attractive lever than relocating production. That is a narrower claim and a far more useful one.
Moving countries moves everything with it. New tooling, new lead times, a new quality baseline, a new relationship, new risk. Redesigning keeps all of that in place and changes the one input you genuinely control.
Where the money is hiding in your own product
The HP numbers are worth sitting with, because they came from real programmes on real products rather than from a model.
Three products went through structured cost reduction. The one still in development before launch came out nearly 39 percent cheaper. The one reviewed a year after launch came out 13 percent cheaper. The third, where compliance testing had already locked the design in place, managed under 10 percent.
Read that order again. The earlier they looked, the more they found.
The savings came from deeply unglamorous places.
- Component substitution. The single biggest source on two of the three products.
- Parts count. One grommet that appeared 28 times in a server rack was replaced with a single injection moulded part, which took out the part cost and the assembly time with it.
- Finishes nobody sees. The authors asked whether the inside of an enclosure needed painting at all, and whether a connector really needed 30 micro inch gold plating rather than 20.
- Tolerances tighter than the product needs. Tight tolerances get specified by default and cost real money to hit.
- Features a minority of customers use. One product lost its battery backup a year after launch because customers were using room level systems instead. It stayed on as a paid option for the ten percent who still wanted it.
Across 117 projects that applied the same design for manufacture and assembly method early in development, the reported averages were 54 percent fewer parts, 52 percent lower part cost, 45 percent lower assembly cost and 32 percent less material.
A fair warning on all of it. These are studies of appliances and electronics, and the newest of them dates from around the turn of the century. Nobody has run the equivalent numbers on homewares, furniture or jewellery, which is where most of the founders I work with live.
Treat the percentages as direction rather than as a forecast for your product. The mechanism is the part that travels. Every component, every finish, every tolerance and every feature in your product is a cost you chose, and you chose most of them quickly.
Ask your factory the other question
Next time your margin is too thin, try this before the discount conversation.
Send your existing factory the drawings and the specification and ask what is expensive about them. Not what the price could be. What is expensive, and why.
Good suppliers know. They know which tolerance makes them slow the line down, which material is priced in a currency that moves, which finish fails inspection often enough that they have quietly built the rework into your quote. They rarely volunteer any of it, because you asked them for a price, not for an opinion.
That answer hands you a list of choices. A discount hands you a slightly thinner version of the same problem.
The execution side of all this lives over on Source Haus. If what you need is the negotiation itself, there is a full piece on how to get a better price from your factory without switching factories. If you need to know what your product really costs once it lands, start with landed cost per unit. And if the change you are weighing up is about how the thing packs, read how many units fit in a shipping container, because packing density is a design decision that shows up on your freight invoice.
Two things worth being careful about
Compliance locks your design earlier than most founders expect. The HP product that saved the least was the one where testing had already been completed. Change a material or a component after certification and you can end up paying for that testing twice. Sort out the sequence before you start redesigning, and Source Haus has a piece on what to settle before production starts.
The second one is that not every available saving is worth taking. There is a version of this exercise where you shave the product down until it feels cheap in the hand, and your returns and your reviews quietly eat the margin you just won. The question is never how much cost can come out. It is which costs your customer can actually feel.
Where I land on it
More than 16 years in product businesses and I still have to catch myself. At Incy Interiors I priced off the factory quote instead of the landed cost, and it cost me a year. I have written about that one already.
The design version of that mistake is subtler and more expensive, because it never shows up as a number on a page. It shows up as a product that was never going to make money at the price your market was willing to pay.
Working on Good Goods now, at the colourful end of statement jewellery, those trade offs sit right in front of me. Every extra component is a cost. Every finish is a cost. Some of them are the entire point of the piece and some of them are habit, and telling those two apart is most of the job.
Design is not the opposite of commercial. It is the cheapest commercial lever you own, and it is the only one that does not need somebody else to say yes.
Curious about what your current manufacturing arrangements could be costing you? Explore Source Haus.
Frequently asked questions
Does product design really determine 80 percent of manufacturing cost?
No. A 1993 MIT Sloan working paper by Karl Ulrich and Scott Pearson tested the claim and traced it to weak sources, including a Ford study described as an informal survey and a Rolls Royce figure that referred to cost reduction opportunities rather than total cost. In their study of 18 coffee makers, the cost spread caused by design was slightly smaller than the spread caused by the manufacturing system. Design matters enormously. It is not 80 percent.
Is it cheaper to redesign a product or move to a cheaper factory?
Usually redesign, and Ulrich and Pearson argued exactly that. Their most expensive coffee maker fell from 14.54 US dollars a unit to 4.98 through a combination of redesign, a better run plant and improved operating practices, and they concluded redesign was the more attractive lever than relocating production. Moving factories also resets your tooling, lead times, quality baseline and relationship.
How much can a redesign actually save?
In three documented Hewlett-Packard cost reduction programmes the savings were nearly 39 percent on a product still in development, 13 percent on one reviewed a year after launch, and under 10 percent on one where compliance testing had already locked the design. Across 117 projects applying design for manufacture and assembly early, reported averages were 52 percent lower part cost and 32 percent less material. These are appliances and electronics, so treat them as direction rather than a forecast for your category.
When is the best time to do a cost pass on a product?
Before launch, and before compliance testing if your product needs it. The HP product reviewed before introduction saved roughly three times as much as the one reviewed a year after launch, and the product where testing had already been completed saved the least of the three.
What should I ask my factory before asking for a discount?
Ask what is expensive about your specification, and why. Which tolerance slows their line down, which material sits in a volatile currency, which finish fails inspection often enough to be priced into your quote. That answer gives you design choices you can act on. A discount only gives them a thinner margin and you the same product.
Kristy Withers
Product business strategist & sourcing specialist
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