The Observational Method (OM) is not widely accepted in practice, although there have been significant efforts in Europe to promote its use, resulting in very good reference documents, e.g. CIRIA Report 185 (1999), IREX (2005) and Geotechnet (2005). There are both legal and risk barriers to wider implementation of the method in some countries. In addition, there is a recognition that structural engineers have an important role in active design. TC 37 therefore conducted a survey during June – August 2009 to gage the use and practice of Interactive Geotechnical Design / Observational Method around the world. The main findings of that survey are presented here.
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