Short answer: yes, mostly, with three specific places where it breaks — and if you're doing both jobs, you want to know exactly where those places are before an auditor points at one of them.
This question comes up constantly in companies under a couple hundred people, because that's how the role actually gets assigned: the production manager already owns the processes, already talks to the customers about problems, already knows where the bodies are buried. So when a customer asks "who's your quality manager?", the owner gives the obvious answer. Sometimes to the customer before mentioning it to you.
The part that surprises everyone
ISO 9001 does not require anyone called a quality manager. The title appears nowhere in the standard. What clause 5.3 requires is that top management assigns and communicates the responsibilities and authorities for roles relevant to the quality management system — someone has to be accountable for the system conforming to the standard, for reporting on its performance, and for keeping customer focus alive in the building. The standard cares that the jobs are owned, not what's on the business card.
It used to be slightly different: the 2008 edition required a designated "management representative." The 2015 edition removed that role deliberately, precisely to stop companies from hiring one person to own quality while everyone else went back to work. The responsibilities still exist; they're just assigned wherever top management decides.
One important exception: AS9100, the aerospace standard, kept the management representative — it requires a specific member of management with the responsibility and organizational freedom to oversee the system. If you're heading toward aerospace work, the double-hat question gets asked more sharply, because "organizational freedom" is exactly what a production manager under delivery pressure doesn't always have. Which brings us to where this arrangement breaks.
Break point one: auditing your own work
ISO 9001 requires internal audits, and it requires them to be objective and impartial — the accepted reading, which every certification body auditor applies, is that you cannot audit your own work. The production manager who is also the quality manager cannot internally audit production, which is most of the audit.
This one has a clean fix. Train someone else — an office manager, an engineer, anyone organized and unafraid of asking questions — to audit the production processes, while you audit everything else. Small companies also solve it by trading internal audits with a friendly non-competitor or hiring a consultant for a couple of days a year. The point isn't ceremony; it's that someone without a stake in production's numbers looks at production honestly.
Break point two: release and disposition under delivery pressure
Here is the scenario the standard is quietly designed around. It's the 29th of the month. A batch is out of tolerance, but probably — probably — fine for the application. Shipping it makes the month. As production manager, you are measured on making the month.
Someone has to decide what happens to nonconforming product, and ISO 9001 requires that dispositions are made by people with the authority to make them — and that conformity to acceptance criteria is verified before release. When the person deciding "use as is" is the same person whose delivery metric is on the line, you don't have a control; you have a formality. Customers know this, which is why supplier auditors ask pointed questions about who can override an inspection result.
The fix isn't necessarily a second person on payroll. It's structural honesty: define in writing which dispositions you can make alone, which need the owner's signature, and which need the customer's concurrence (in aerospace, use-as-is on customer-designed product generally isn't yours to grant at all). Then follow it even in the last week of the month — especially in the last week of the month. An auditor who finds a clean, followed disposition rule run by a double-hatted manager is satisfied. An auditor who finds "the production manager decides" with no boundaries has found their first major finding.
Break point three: telling leadership the truth
The quality role reports on the performance of the system to top management — that's a clause 5.3 responsibility, and it lands in management review. It includes reporting things like: our on-time delivery is fine but our rework is eating us alive, our biggest customer's complaints are trending up, production is skipping the final-inspection step when we're behind.
When the person reporting those things is production, the report has a way of softening. Not through dishonesty — through the completely human reluctance to stand in front of the owner and indict your own department. The mitigation is to build the report from records rather than narrative: scrap counts, complaint logs, audit findings. Numbers don't get embarrassed. (This is, incidentally, the strongest practical argument for keeping quality records in a system rather than in memory and spreadsheets — the reporting writes itself, and it can't be accused of having a mood.)
So: should you do both jobs?
In a shop under ~250 people, double-hatting is normal, survivable, and often the best available option — the alternative is frequently a quality manager who doesn't understand the shop. Do it with three guardrails:
- Someone else audits production. Non-negotiable; this is the one an external auditor will check first.
- Disposition and release authority is written down, with limits on what you can decide alone, and the limits hold under schedule pressure.
- Quality reporting runs on records, not recollection, so the message to leadership survives the messenger's conflict of interest.
And keep one eye on the horizon: if the aerospace customer shows up, AS9100's management representative expects organizational freedom, and if the company doubles in size, the two jobs will each become full-time on their own schedule, without asking you.
If you just acquired the second hat this week — first, welcome; second, we wrote a survival guide for your Monday meeting.