To make realistic comparisons between forms of delivery for the capital component of projects (capex) all, or a majority, of the associated costs need to be brought to account. This includes preliminary works, detailed design, project management, procurement (possibly including construction) and completion costs such as settlement of any contractual disputes. We concentrated on completed or largely completed projects so that all or the majority of costs would be brought to account in most projects. All projects included data for at least one of the project stages 1 and 2 (denoted 'partial data' in Appendix C) with a majority of projects having 'full data' (i.e. data for all stages and the 'Full Period').