s. This allows a specific team to identify and define specifications on a layer with minimal impact on other layers. Fundamentals of EMS, NMS and OSS/BSS Mapping Stategy, infrastructure, product Operations Market/sales, product, and customer Service Resource Supplier, partner Enterprise Figure 24.1 SID domains mapped on eTOM level 0 model. This allows independent definition allowing distributed work teams. It should be considered that there is not necessarily a one-one relationship between the layers in SID. The eTOM together with the SID model provides enterprises with a complete view of their business considering both process and information perspectives. SID provides the definition of the affect of information entities on the business pro- cesses defined in the eTOM. A combination of SID and eTOM provides the requi- site materials that will help an enterprise to achieve its business goals. The SID framework organizes information in a business view using business entities. The definitions using SID are made as generic as possible to promote reuse. The layered framework in SID helps to logically partition data relating to specific domains. The use of business oriented UML class models makes it easy to work with SID. The domains of SID align with the business framework of eTOM. Creation of domains enables segmentation of the total business problem and allows TMF teams to be focused on a particular domain of interest. When the resultant busi- ness entity definitions within each domain are used in conjunction with the eTOM business process framework, it will provide a business view of the shared informa- tion and data. Aggregate business entities allow further partitioning of the informa- tion within each domain. The business entities, attributes, and relationships are detailed with textual descriptions in each SID addendum. SID provides a consolidated Rational Rose UML based model that characterizes the entities to a model that can be easily understood for implementation of business applications. Information Model