7. Design

Based on the initial research and SI proposal, really get to grips with the design. Things to cover in this stage:

• Design Authority setup
• Technical vision
• High Level Design (HLD) then Low Level Design (LLD)
• Legacy and reach-back design
• Data flows
• Data model
• Functionality
• Needs, journeys
• Requirements, NFRs (Non-Functional Requirements)
• Business architecture
• Role mapping
• Integration specifications
• Environment model
• Data owner table (legally accountable data owners)

Pitfall: Starting build of the test system without an approved design.

Minor tweaks after starting the build can usually be accommodated. However, changes in the HLD or in essential operations can result in costly rework or delays.

Solution: Agree on the design before starting to build. Get the design signed off by technology and business leads.