Four-Phase Project Delivery and the Pathway to Perfection

Digby Christian1 & Jason Bredbury2

1Senior Regional Program Manager, Sutter Health – Facility & Property Services, Sacramento, California USA,
2Regional Design Manager, Skanska USA Building, Oakland, California USA,


Proposes a conceptual framework for a systematic approach to improving the success of capital project delivery. The Architectural, Engineering, Construction (AEC) community lacks a coherent, transferable conceptual framework for project delivery. This absence prevents deep learning within any given project, as there is no universal concept of perfect project delivery against which to measure the actual delivery. It also prevents meaningful learning about project delivery across projects due to the absence of a common approach in the analysis of project delivery that works for all projects regardless of type, location or context. Together these absences severely limit the extent and speed of learning regarding project delivery across the AEC community. This paper proposes a four-phase concept of project delivery that aligns with the “V” diagram from systems engineering. This concept can be used to analyse project delivery on all actual projects, and can be used to describe the ideal state of perfect project delivery. Then, by comparing actual project delivery to perfect project delivery, strategies to move the actual toward the perfect can be formulated and actioned.


Project delivery, theory, Lean Principles, Integrated Project Delivery, Virtual Design and Construction, Ideal State, Current State, Future State, “V” Diagram



Christian, D. & Bredbury, J. 2014, 'Four-Phase Project Delivery and the Pathway to Perfection' In:, Kalsaas, B.T., Koskela, L. & Saurin, T.A., 22nd Annual Conference of the International Group for Lean Construction. Oslo, Norway, 25-27 Jun 2014. pp 269-280

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