Requirement & Functional Specification — Free Infographic

A one-page infographic showing which specification document each side owns in an ERP or business software selection — and at what point it becomes part of the contract..

By Dr. Harald Dreher Published: Apr 21, 2025 (Updated: Sept 9, 2026) 0 min read

A one-page infographic showing which specification document each side owns in an ERP or business software selection — and at what point it becomes part of the contract.

What the infographic covers

Who owns the requirement specification — and why a vendor-written one is a warning sign
Who produces the functional specification, and what it adds
The contents of each document, side by side
The point at which the functional specification becomes a contract component

Download the infographic (PDF)

The full explanation

For the detailed treatment — including the 2026 shifts in requirement documents, industry-specific pitfalls, and the ten building blocks of a classical requirement specification — see Requirements Specification vs Functional Specification.

To have an existing specification reviewed independently, see ERP consulting and specifications.