Construction projects are complex and have become more so during the late 20th century. This complexity is due to the failure of planning mechanisms and the apparent inability of plans to represent the reality of on-site construction. The occurrence of unpredictable events disrupts site processes and site conditions sometimes approach that of chaos. One strategy to deal with chaotic site conditions is to increase industrialisation, i.e. a controlled construction process following a predicted plan. The Swedish government suggests that increased competition could be obtained by an augmented use of timber in housing construction through developed building systems for multi-storey houses, and by using the knowledge of single family house manufa...