Regarding productivity as a scientific item, a mathematic or an economic value to be measured and analysed, almost nothing has been done in the field of Building and Construction the last ten years. I might have happened that some scientific method has been used inside a single company, but nothing have been observed published since the University of Luleå Thesis in 1996 (Johsson 1996). - Caused by the concern of seemingly strong growing prices in housing, both governments and industry in each country has during the last few years paid more attention to this matter. As a consequence the word productivity is more and more been take into use by the different parties, and some studies have been carried out.