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Video tutorial

How to Write a Functional Design Document

A silent guide to writing a clear functional design document that developers can build from and testers can test against.

Free

Free 2-minute video lesson. A silent guide to writing a clear functional design document that developers can build from and testers can test against. Short, visual and to the point, so you can watch it between meetings and apply it the same day.

This silent explainer shows how to write a functional design document for an ERP gap. It covers the recommended sections, how to write testable requirements, how to describe screens, data and integrations, and how to cover error handling and security. It also shows a review checklist and common mistakes that cause rework. Aimed at Dynamics 365 functional consultants, business analysts and freshers who want documents that move smoothly from sign-off to build and test.

What you'll learn

  • What an FDD does
  • Recommended sections
  • Write testable requirements
  • Describe the process visually
  • Cover data and fields
  • Integrations need extra detail
  • Don't forget the edges
  • Key idea
  • Review checklist
  • Common mistakes
  • Get it signed off

Who it's for

Project managers, solution architects, functional consultants and client-side leads who want their ERP program to go live on time and actually deliver value.

Go deeper

Pair this lesson with the related free e-books and templates in the resource library, and read the latest practical articles on the blog.

Let's connect

I'm Pranshu Shubham, a Microsoft Dynamics 365 F&O Solution Architect and PMP-certified program lead with 8+ years of ERP and AI transformation across the USA, Europe and APAC. I created this resource from real project experience, and I'd love to hear how you use it.