o being looked into as an outcome of NGNM initiatives. 17.3 TR133 TeleManagement Forum (TMF) has published a member evaluation version of NGNM strategies (TR133), which suggests a lifecycle approach to give holistic view to NGNM. The lifecycle model has four blocks (see Figure 17.1) that correspond to intersection of stake holder and technology parts. Stake holder part has the service provider and service developer space. Technology part has the technology neutral and technology specific space. The four blocks are: Business: This block is the intersection of technology neutral space and ser- vice provider space. The service provider defines requirements in a technology agnostic manner, which is the business block. System/architecture: This block is the intersection of technology neutral space and service developer space. Based on the requirements defined in a business Next Generation Network Management (NGNM) Business TR133 Deployment System/ architecture Implementation Figure 17.1 NGNM lifecycle. (From TMF TR133 NGNM Strategy document). block by service provider, the service developers create an architecture that is not tied to a specific technology or vendor product and is a technology neu- tral architecture (TNA) that satisfies the requirements. Implementation: This block is the intersection of technology specific space and service developer space. A technology specific implementation of the TNA is performed in this block. The implementation is performed by the service provider. Deployment: This block is the intersection of technology specific space and service provider space. Once the implementation is completed by the service developers, the service providers need to deploy the solution. This activity is captured in the deployment block. These four blocks constitute the telecom lifecycle and is used to give holistic vision in all forms of development activities. The lifecycle is discussed in detail in the chapter on NGOSS lifecycle. NGNM focus is also split into these four blocks by TMF in the TR133 document