ABSTRACT
On the background of scarce public budget resources, public-private-partnership-projects (PPP) have gained increasing importance in the public building sector. As a consequence, since 2004 the number of PPPprojects in Germany has increased by more than 100% on a yearly base. The majority of PPP-projects is in the field of building construction (hospitals, schools, administration buildings), but infrastructure projects (bridges, tunnels) with a quota of 20% form a vital part as well (BMVBS (2007). There are different types of PPP-models ranging from so-called ‘Build-OperateTransfer’—to ‘Build-Operate-Own’—models, but all of them have in common that the construction company is not only responsible for the planning and construction phase but also for the maintenance of the structure over a period of twenty to thirty years, depending on the model chosen.
