What constitutes good production flow in construction?

The notion of production flow is not well understood in the context of construction. A coherent, consistent theoretical model of flow would have practical value as it would support development of better approaches to managing production within and across projects and of measures of flow quality needed to implement them. A literature review and analysis of existing conceptualizations of flow in manufacturing and in construction lead to formulation of a model of construction flow that has three interrelated but distinct axes: project portfolio, process and operations flows. A tentative set of ideal conditions for good flow was formulated with regard to each of these three primary flows. The review, the summary model and the set of conditions provide a basis for further research and development of a comprehensive model of flow in construction and a definition of what constitutes good flow.