“…The architecture qualities are qualities that are important for the design of a ''good" e-contracting reference architecture. Initially, as an inspiration for the definition of non-functional qualities required in an e-contracting reference architecture, we used the list of non-functional qualities on information systems presented in Bass et al (2003) and existing publications on e-contracting (Angelov and Grefen, 2002, 2003b, 2004aGrefen et al, 2003;Griffel et al, 1998;Hoffner et al, 2001b;Merz et al, 1998). Based on our initial list of requirements, we defined a draft version of ERA.…”