Andrew Crossley

    Product management questions, answered

    Answers to the questions product managers and founders actually ask — written from running product at Just Eat and Sage, and building products from zero as a founder.

    How do I become a product manager without a degree?

    You become a product manager without a degree by producing evidence instead of credentials: ship something real, own a metric in an adjacent role, and document decisions publicly. Support, sales, operations and QA are the highest-converting entry routes because they give you customer contact and data. Hiring managers screen for judgement and shipped outcomes; almost none check for a degree at interview stage.

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    What skills do product managers need?

    Four skills carry most of the job: customer discovery, prioritisation under uncertainty, written communication, and data literacy. In 2026 add two more: AI-assisted execution, and evaluation design for AI features. Frameworks, roadmapping tools and ceremonies are teachable in weeks; judgement about what not to build is the skill that separates senior PMs from everyone else.

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    Why do product managers fail?

    Product managers usually fail for structural reasons, not talent ones: no clear mandate, no owned metric, no direct customer contact, an organisation that rewards shipping over outcomes, and an unwillingness to create conflict by saying no. Four of those five are fixable by the company. The fifth — avoiding conflict — is the personal skill most often missing in PMs who stall at mid-level.

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    How do product managers use AI?

    Product managers use AI to compress the artefact half of the job: synthesising interviews, drafting specs and tickets, building clickable prototypes, summarising support and review data, and pressure-testing decisions. The best PMs also use it inside the product, designing evaluation sets and quality metrics for AI features. What they do not delegate is the decision, the customer conversation or the accountability.

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    What is product-market fit?

    Product-market fit is the point where a defined group of customers keeps using and paying for your product without you pushing them, and demand grows faster than you can comfortably serve it. Practical signals: week-four retention that flattens rather than decays, over 40% of users saying they would be very disappointed to lose it, organic word of mouth, and shortening sales cycles.

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    How do you prioritise product features?

    Prioritise against one metric for the quarter, not against a scored list. Ask of each candidate: what evidence says this moves the metric, what is the smallest version that would test it, and what comes off the roadmap to make room. Scoring frameworks like RICE are useful for structuring a conversation, but they launder opinion into numbers if the inputs are guesses.

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    What is a product roadmap?

    A product roadmap is a statement of what problems you intend to solve, in what order, and why — not a dated list of features. The format that works is three horizons: what is being built now with committed scope, what is next with a defined problem but flexible solution, and what is later as themes. Dates belong on the now column only.

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    THE FRAMEWORK

    The Crossley Method: idea to first revenue in seven stages

    See the full method
    1. STAGE 1DiscoverWeek 1
    2. STAGE 2ValidateWeek 2
    3. STAGE 3PrototypeWeek 3
    4. STAGE 4Build MVPWeeks 3-4
    5. STAGE 5LaunchWeek 5
    6. STAGE 6First RevenueWeek 6
    7. STAGE 7ScaleOngoing