Abstract: In literature one can find criteria for the comparison of enterprise resource planning (ERP) system architectures. (Kennerley and Neely, 2002; Dumslaff, 1994; Stefanou, 2001) However, these criteria are usually on a very detailed technical level and are based primarily on the requirements of larger companies. (Illa et al., 2000; Verville and Halingten, 2002). It is therefore difficult for small and medium-size enterprises, which have other requirements, to use these criteria to decide upon a particular system. This paper defines a specific class of companies, “orchestra companies”, which fall into the category of small and medium size enterprises. A key aspect of an orchestra company is the fact that it does not gain direct value from its IT systems; the IT equipment in the company is only an operating resource. These companies do not have their own IT departments and decisions regarding ERP selection are usually made by the decision makers directly without a long and expensive selection process. (Barbacci, 2002) On the basis of the definition and needs of orchestra companies, criteria for the comparison of ERP systems specific to this company class have been developed. Based on a literary analysis of existing methods for the comparison of ERP systems, the criteria for orchestra companies are identified and modified. The target audiences are IT managers and decision makers who can use these criteria during the ERP selection process to get qualitative metrics as a basis for the choice of a system. The validation of the developed criteria hasBusiness One 2007.