- eTOM is a reference framework that categorizes the business processes that a service provider will use. It broadens the TOM model to a complete enterprise framework and addresses the impact of e-business environments and business drivers. eTOM can be considered a blueprint for standardizing business processes as well as operations support systems (OSS) and business support systems (BSS). Another area of improvement is process-modeling methodology, which provides the linkage necessary for Next-Generation Operations Support Systems (NGOSS). NGOSS programs implement a common system infrastructure framework, in which components that adhere to the specifications can interoperate in a flexible application infrastructure.