ERP Template - Sample Functional Design Document (FDD)

Functional Design Document — exampleà BC Importer Field  DOCX

ERP_Sherpas_FDD_BC_Importer_Field.docx

A complete Functional Design Document (FDD) specifying a sample Business Central customisation that adds an 'Importer' field to the Item Card — automatically populated from the linked vendor's country code — and prints it on three posted document reports: Posted Sales Shipment, Posted Transfer Shipment, and Posted Purchase Return.

The document covers purpose and scope, business context, in-scope and out-of-scope boundaries, functional requirements, data mapping, technical design, test scenarios, and sign-off.

For a PM, FDDs of this quality serve as both the developer's instruction and the acceptance criteria — removing ambiguity about what was agreed and providing the baseline against which testing and client sign-off are conducted. This example illustrates the standard of documentation that should accompany any bespoke development on an ERP project.