Does ISO Certification Matter When Choosing a Design Consultancy?

Oscar Daws, May 19 2026

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Many design agencies run on talent alone. However if you’re a startup, large business or medical device company then you’ll want to be assured that your project, and the wider business, is being run properly. Here is why ISO certification is worth looking for in a design consultancy, and why ISO 9001 is the right standard for a design partner to hold.

When you hire a design consultancy, you are placing a fair amount of trust in people you have only just met. You are trusting that they will run your project carefully, keep your ideas safe, and deliver the standard they promised in the pitch. Usually it works out. But “usually” is doing a lot of work in that sentence.

Tone is an ISO-certified design consultancy, holding ISO 9001:2015. We are independently audited against that standard, and we built our quality management system for a simple reason: we wanted our clients to know the work is run well, rather than hope it is. This article explains what an ISO-certified design consultancy actually gives you — and why, for a design partner, ISO 9001 is the smarter standard to hold.


What is a quality management system?

A quality management system, or QMS, is simply the documented way a business runs itself and its projects. ISO 9001:2015 is the international standard for one. The certification is not a badge you earn once and forget. To keep it, you are audited regularly by an external body that checks the system is real and being used.

For a design consultancy it comes down to three main things:

  • – Processes are written down, so the quality does not depend on who happens to be available.
  • – Records are controlled, so there is a clear audit trail when it’s needed later down the line.
  • – Improvement is built in, so problems get caught and fixed rather than quietly repeated.

Most design agencies never bother. Building a QMS is unglamorous, and it sits well outside the creative work a studio is hired for. We took a different view. It matters too much to skip.

What does an ISO-certified design consultancy actually give you?

The certificate is the headline. The value is in what the system does day to day.

First, consistency. Because the way we work is written down rather than improvised, the quality of the output does not rest on one person. Whoever picks up your project is working to the same process and the same expectations. That is the difference between hiring a studio and hiring an individual who happens to work at one.

Second, a business that is run well, not just a project that goes well. A QMS covers the whole organisation, and improvement is a habit rather than a hope. Your project benefits from a company that keeps adapting as tools and ways of working change.

Third, your information is protected properly. Early-stage product IP is among the most sensitive material a company owns. We treat protecting it as a documented process, with real security and confidentiality protocols behind it.

And finally, a real route to resolution if something goes wrong. No project is immune to problems. What matters is whether there is an established way to deal with them. We have defined procedures for handling complaints, correcting their causes and preventing further issues to ensure so an issue gets properly resolved.

There is a practical upside too. Larger companies often run formal supplier approval systems, and an established 9001 certification makes clearing those gates far easier.

Certified versus non-certified: what is the real difference?

Plenty of excellent studios hold no certification at all, and talent is not the issue. The difference is everything around the talent.

With an uncertified agency, you are trusting that the discipline is there. With a certified one, you know it is, because an independent auditor has checked. That difference is felt most keenly at the later stages of the project and even after it’s ended, when it’s too late to go back and change how the process was run.

For example during transfer to manufacture, the point where a project most often comes unstuck, it is critically important that a robust document control system is in place to ensure that details aren’t missed, and requirements don’t get lost in translation. And even once the product is in market, there are myriad situations in which you might need to go back into the archives to see why a particular decision was made. If it wasn’t recorded at the time, you’ll be flying blind.

Good documentation pays off in other ways too. It lets a certified system interface cleanly with other certified parties, from manufacturers to test houses. And the records have a habit of proving useful later — medical clients need them for their regulatory file, and consumer clients regularly draw on them as supporting evidence for R&D tax claims.

So why ISO 9001 rather than ISO 13485?

ISO 13485 is the quality standard written for medical devices, so it is a reasonable thing to ask a design partner about. We have chosen 9001 instead, and we chose it deliberately.

The two standards are close relatives. ISO 13485 even includes a table mapping its clauses back to 9001. For what a client actually needs from a design supplier, they overlap a great deal. But much of 13485 is aimed squarely at the legal manufacturer — the company that places the device on the market and carries regulatory responsibility for it. Tone is a design partner, not a legal manufacturer. Certifying against 13485 would mean maintaining requirements we do not use, and that cost would land on our clients.

Staying with 9001 keeps us competitively priced. It also keeps us flexible, which matters more than it sounds. We can scale the system up for a project that needs it, adding the extra rigour a regulated programme demands. We can scale it down for an early-stage consumer concept, where heavy document control would only add cost and slow things down. A 13485 system is, by design, far less willing to flex that way.

In the end it comes down to value. Over many years and many clients, one thing has stayed constant: clients want us spending our time on the design, because that is what they came to us for. A lean, efficient 9001 system keeps the low-value admin to a minimum and puts the rigour where it earns its place.

If you are developing a medical device

Medical device development asks for a level of rigour that most consumer work does not, and there is one question we are asked at almost every medtech tradeshow: are you ISO 13485 certified? The honest answer is no — and, as above, that is a choice rather than a gap. What matters is that our 9001 system has been designed from the start to sit alongside a client’s 13485 system and feed it cleanly.

For medical projects we flex the system up. We add controls a regulated programme depends on, such as input-to-output traceability, and the design outputs we produce are structured to drop straight into the client’s Design History File and technical documentation. You stay the legal manufacturer; we give you design work that your quality team and your auditor will recognise.

For first-time medical device companies, there is one more option worth knowing about. Younger companies often need to lean on an established structure while they build their own. For them, we can run the project through an optional eight-stage gated design and development process, aligned to ISO 13485:2016 Clause 7.3. It gives a startup a clear, defensible framework to work to before its own quality system is fully in place. For established clients with a mature system of their own, we simply set that aside and fit the way they already work.

Choosing a design consultancy is partly a decision about how much you can trust the way the work will be done. An ISO 9001 certification answers that with independent evidence instead of a promise. By choosing it over 13485, we keep that rigour affordable and flexible, ensure we remain a partner genuinely focused on the design, with the discipline to stand behind it.

If you are working on a product, whether that be consumer, medical, or something between the two, we would be glad to talk through how our process would fit yours.


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