How to write a PRD
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A product requirements document (PRD) aligns a team on what to build and why. It's not a contract or a list of every pixel. A strong PRD covers the problem and evidence, target users, goals and success metrics, scope and non-goals, user flows or stories, functional requirements with acceptance criteria, edge cases, non-functional requirements (performance, security, accessibility), dependencies, risks, open questions and a decision log. It links to designs, research and technical specs rather than duplicating them.

Testability is key. Agile Alliance describes given–when–then as a structured way to express acceptance criteria that teams can verify.¹ Non-functional requirements such as reliability targets often come from service level objectives, which Google's SRE book defines.² Clear PRDs also guard against waste: Pendo found that 80% of features are rarely or never used,³ which is why problem framing and success metrics come first. Requirements writing is core to business analysts, whom AmbitionBox lists in India at a typical ₹9.6–10.7 lakh,⁴ and to product managers at ₹22.1–24.5 lakh.⁵

Features rarely or never used (Pendo)

80%

Typical length of a focused feature PRD

2–5 pages

Typical business analyst pay in India (AmbitionBox)

₹9.6–10.7 lakh

Typical product manager pay in India (AmbitionBox)

₹22.1–24.5 lakh

Table: How PRD skills are assessed (editorial summary)

Table: Outline of a focused loyalty PRD (illustrative)

Table: How requirements writing evolved (editorial summary)

• A PRD under five pages
• Clear problem and evidence
• Goals, metrics and guardrails
• Explicit non-goals
• Testable acceptance criteria and edge cases
• A verified PRD certificate

Show clarity's impact: "Rewrote 40-page loyalty spec into 4-page PRD with non-goals and metrics; shipped first version in five weeks; repeat orders improved."

"What goes into a PRD?"

Problem, users, evidence, goals and metrics, scope and non-goals, requirements, edge cases, non-functional needs, risks and open questions.

"How do you keep PRDs from going stale?"

Treat them as living documents with a decision log, owner and link from tickets.

"How detailed should requirements be?"

Enough to remove ambiguity on behaviour and edge cases, leaving design and engineering room to solve.

"How do you involve engineering?"

Share early drafts, ask for feasibility input and incorporate technical constraints.

"What's a non-functional requirement?"

How the system behaves — speed, reliability, security, accessibility — rather than what it does.

• "What does a typical spec look like here?" — expectations.
• "Who reviews PRDs?" — collaboration.
• "Where do decisions get recorded?" — documentation culture.
• "How are designs linked to specs?" — workflow.

Table: Roles that write requirements and typical pay in India (AmbitionBox, October 2026; indicative)

Table: Common PRD tools (editorial guidance)

• Business analyst — detailed requirements.
• Associate PM / product owner — feature PRDs.
• Product manager — product-area specs.
• Senior PM — strategy documents and narratives.
• Product leader — sets documentation standards.

1. Week 1: Draft — Write a PRD for a feature you'd improve.
2. Week 2: Review and prove — Get feedback from an engineer; take the PRD Certification.

Related: User Stories, Requirements Elicitation and Technical Product Management. Guides: user stories, requirements elicitation and technical PM.

• Drafting — problem, goals and scope.
• Reviewing — with design and engineering.
• Answering — questions during build.
• Updating — decisions and changes.
• Linking — stories, designs and data.
• Closing — results after launch.

"PRD vs user stories?"

The PRD gives context and goals; stories break the work into deliverable slices.

"How do you write a PRD for an AI feature?"

Add quality thresholds, evaluation sets, fallback behaviour, safety and cost constraints.

Table: A first-90-days plan (editorial guidance)

Read recent PRDs to learn the team's conventions and gaps. Write your first one short and problem-led, and review it with engineering and design early. Afterwards, propose small template improvements such as non-goals and decision logs.

AI assistants can draft a full PRD from a few notes in seconds. That's useful for structure and first drafts, but generated specs often sound complete while missing the things that matter: real evidence, specific edge cases, constraints from legal or finance and decisions only the team can make. They can also invent requirements nobody asked for.

Use AI to speed up the parts that are mechanical — outlining, rewording, generating test cases from acceptance criteria, checking for ambiguous language — and review every line yourself. For AI features, PRDs need new sections: quality bars measured on evaluation sets, fallback behaviour, safety requirements, latency and cost budgets. In interviews, show that you can write a crisp PRD by hand and use AI to make it better, not longer.

Non-goals are among the most useful lines in a PRD. Write them as plain statements of what this project won't do, with a short reason: "No tiered membership in v1 — we need evidence that basic points change behaviour first." Include requests stakeholders are likely to raise, and features that might seem natural extensions. Revisit non-goals when the project ends; some become future work. Clear non-goals save hours of debate and protect the team's focus.

A PRD review is where hidden problems surface. Share the draft at least a few days before the meeting and ask reviewers to comment in advance. In the session, walk through the problem and goals first, because disagreements about scope often come from different views of the goal. Then go through requirements and edge cases, asking engineers what's unclear, risky or expensive. Capture open questions with owners and dates, and record decisions in the document's decision log. Agree what "ready to build" means — usually designs linked, key questions answered and acceptance criteria clear. A good review leaves the team confident about what they're building and why, and leaves the PRD noticeably shorter and sharper than before.

• Solution before problem.
• No success metric.
• Missing non-goals.
• Untestable requirements.
• Long specs nobody reads.

Acceptance criteria guidance comes from Agile Alliance; reliability concepts from Google's SRE book; feature usage from Pendo; and India pay from AmbitionBox (read October 2026). The PRD outline, assessment formats and history are editorial. Science of Apps publishes the free test linked here. Last reviewed October 2026.

• PRD — product requirements document.
• Non-goal — something explicitly out of scope.
• Acceptance criteria — conditions that confirm a requirement is met.
• Edge case — an unusual situation the product must handle.
• Decision log — a record of key decisions and reasons.