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Presents an early publication of the results of an RICS Research Foundation Education Trust funded project to investigate the use of modern non‐destructive test equipment during surveys. Discusses the data collection and analysis phases in detail followed by the presentation of the preliminary findings of a national postal questionnaire survey of 143 building surveying practices. Stays confined to a discussion on the largest data set – equipment used for commercial and industrial surveys. New technology has made some impact in that more surveyors are using digital cameras and electronic measurement aids but little use is being made of portable materials testing equipment. The results have indicated that there are increasing trends in the use of endoscopes, some environmental measuring aids, metal detectors and electrical installation testing by surveyors.

As the construction industry strives for closer integration of the participants, more responsibility for the management of the detailed design process is being directed to main contractors and combined with their existing duties of managing the construction and pre‐construction processes. Crucially, this necessitates successful management of the interface between these processes, and this paper seeks to investigate a conceptual view of that interface to provide a foundation for improving understanding of it.

Recent and current literature is examined, and various theoretical backgrounds for the design and the construction processes are reviewed. The consequences for the understanding of the interface are discussed. The significance of conceptual frameworks is also reviewed.

A significant difference is identified in the published work between the theoretical understandings of the construction and design processes. From this a conceptual framework for the interface between these processes is developed.

The difference identified may have significant implications for further research, and for the development of management techniques applicable to the interface. Furthermore, the lack of access to specialist knowledge at the optimum time during the design process is identified as having a potentially significant impact on that process.

These findings could provide an understanding and basis for further research into the interface between the processes, and for the development of an enhanced model that would facilitate improved management of the interface and the optimisation of the process of the selection, appointment and input of specialist subcontractors.