Review of the design involves five stages. Those stages are:

1) 4a Master Plan Feasibility Report

2) 4b Concept Design Report (typically 30% design)

3) 4c Schematic Design Report (typically 50% design)

4) 4d Detailed Design Report (typically 90% design)

5) 4e Finalise scope of Works (close to 100% design)

• Throughout the Design Review process, the Project Manager and/or Designer must address all Defence requirements and issues.
• Design documentation produced must never be silent on any issue/feedback provided to Project Manager and/or Designer by the IAD Project Officer
• Any proposed variation/alternative solution to IM mandated policies must have TA sign off.
• IAD Project Officer to check requirement with DEEP.
  

• The outcome of the review design phase is sufficient cost estimate to finalise the DBC.
• The DBC can be produced at any stage of the review design phase.
• The DBC cost includes commissioning and takeover costs
• The stage at which the DBC is produced depends upon the complexity of the project.