Guides
Detailed guides on every type of requirement document: what it is, when to use it, and how to write one
How to Write a PRD: Product Requirements Document Guide & Templates
What is a PRD, why you need it, how to write one. 9 variations, templates, common mistakes. A professional guide for product managers.
AI-Optimized PRD: a requirements document for AI agents
How to write a PRD that Cursor, Claude Code, or Bolt can understand. Format, sections, examples. A 2026 trend.
AI Product PRD: requirements for products built on AI/ML
How to write a PRD for AI-powered products. Model requirements, eval criteria, hallucination tolerance, data pipelines, fallback behaviors, and monitoring.
MVP PRD: a requirements document for the minimum viable product
How to write a PRD for an MVP. Tight scope, P0 features only, quick launch. Template and step-by-step guide.
How to Write a BRD: Business Requirements Document Guide & Templates
What is a BRD, why you need it, how to write one. Standard and Lean formats, templates, common mistakes. A professional guide for business analysts and product managers.
Lean BRD: a lighter business case for agile teams
A five-section BRD for projects that need a structured business justification without the overhead of a full document. When to use it and how to write one.
How to Write an FRD: Functional Requirements Document Guide & Examples
What is an FRD, why you need it, how to write one. Sections, requirement IDs, acceptance criteria, and the API FRD variant. A guide for business analysts and technical leads.
API FRD: functional requirements for API products
How to write an FRD for API-first products and microservices. Endpoints, authentication, request/response schemas, error codes, rate limiting, and versioning.
How to Write an MRD: Market Requirements Document Guide & Templates
What is an MRD, why you need it, how to write one. Market sizing, customer segments, competitive analysis, and requirements by segment. A guide for product managers and strategists.
Startup MRD: lean market research for early-stage teams
A five-section MRD for startups that need market context without a multi-week research effort. Opportunity, segments, competition, requirements, and success metrics.
PRD vs BRD: what's the difference and which one do you need
Detailed comparison of PRD and BRD: purpose, audience, content, when to use each. Difference table and selection criteria.
SRS (Software Requirements Specification): Complete Guide & Templates
What is an SRD (SRS), why you need it, how to write one. Sections, IEEE 830, functional and non-functional requirements, architecture, data models. A guide for engineers and technical leads.
PRD vs BRD vs FRD: a complete comparison of three documents
How PRD, BRD, and FRD differ. When you need each, who writes them, what they contain. Comparison table and selection criteria.
Agile SRS: lightweight software requirements for iterative teams
How to write a lightweight SRS for agile teams. Living document, modular structure, sprint-aligned updates, and integration with user stories and acceptance criteria.
BRD vs MRD: what's the difference and when to use each
Detailed comparison of BRD and MRD: purpose, audience, content, timing. Difference table and selection criteria for strategic requirement documents.
How to Write a TRD: Technical Requirements Document Guide
What is a TRD, why you need it, how to write one. Hardware, software, platform, infrastructure requirements. A guide for architects and technical leads.
How to Write a QRD: Quality Requirements Document Guide
What is a QRD, why you need it, how to write one. Quality attributes, acceptance testing, performance benchmarks, and compliance standards. A guide for QA leads and project managers.