e in other phases. Process, Interface, and Technology Standardization Let us further elaborate the analysis above on how well the OSS/BSS market matches the characteristics of the Productization and Standardization phase of the vertical software industry evolution model described in chapter on "Model for Evolution of a Vertical Software Industry." According to the model, the core business processes of the companies operating in the market should be harmonizing in the Productization and Standardization phase. This harmonization activity is indeed taking place in the telecom industry, as L. Frank et al. the TM Forum is actively promoting the eTOM framework (TMF 2005) for defining standard processes of telecom operation. In the Productization and Standardization phase, the software vendors are expected to strive for standardized interfaces to the underlying technologies, to eventually adopt the dominating one. In general, the OSS/BSS systems need to communicate with a variety of network technologies, such as mobile radio access networks, ATM/frame relay networks, broadband networks, transmission networks, fixed or mobile TDM, core & HLR, IP & corporate networks, Service delivery & IN machinery, as well as mobile, CPE & home terminals. However, in line with the vertical industry evolution model (see also Fig. 3 in chapter, "Model for Evolution of a Vertical Software Industry"), new software ventures would rather focus on the interfaces expected to dominate the future product markets. This hypothesis can be verified by checking if a significant correlation exists between support for a smaller number of interfaces (manifesting the focus on dominating interfaces only) and the share of product license revenue as opposed to directing software spending to in-house software development with personnel knowledgeable on the interfaces used (manifesting the young age of the vendor and hence its focus on software products). Besides the two variables above, though, it is insightful to consider also some other variables; the list 