: One of the book's primary strengths is grouping all "Defined Risks" in Sub-Clause 6.1, providing a clear and balanced risk allocation between the Employer and Contractor. Enhanced Guidance

| Feature | Red Book 2017 | Blue Book 2016 | Silver Book 2017 | |---------|---------------|----------------|------------------| | Design responsibility | Employer | Contractor (mostly) | Contractor (full) | | Payment basis | Bill of Quantities (lump sum) | Measured volume (re-measurement) | Lump sum firm price | | Geotechnical risk | Shared (clause 4.12) | Contractor, with limited relief | Contractor entirely | | Defects period | 12 months typical | 6 months (due to marine corrosion) | 12–24 months | | Dispute resolution | DAAB (standing) | DAAB (ad hoc optional) | DAAB (standing) |

Compared to the original 2006 version, the 2nd Edition introduces several industry-focused updates: Risk Allocation:

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