iguration of elements in the network; it also supports design of con- nections such as links between the elements. Network design reference models currently available are mainly focused on the service provider and are intended to help them evaluate market penetration as well as other user-related capabilities of applications or services. The three parties-the service provider, service developer or software and equipment pro- vider, and the customer-should be considered for introducing changes in the network. There should be an evaluation of end-to-end flow from services to net- work capabilities. When service providers want to offer a new and innovative service, in most cases the network to support the same will not be available and when the operational equipment provider comes up with an innovative technol- ogy in the network there might not a proper business case resulting in a subop- timal market fit. This affects profit margins of the service developers as well as impedes rapid service development. For example, some of the widely used reference models for wireless network design include WWRF/WSI and I-Centric. One of the areas that these models do not address is the evaluation of the customer space and the network space as one full flow, which is required to bring out business-focused technology devel- opment. With the advent of the converged network, the service providers, con- tent providers and network equipment providers have to rapidly conceptualize, evaluate, and integrate their service offerings. Also due to increasing competition, there is additional pressure to deliver the "right" product/service "on time, every time." It should be kept in mind that any focused development outside the realms of pure research needs to have a supporting business case and technical roadmap evaluating the value add it will offer to both technology and business. In com- ing up with a proper business case and technical roadmap, the customer space, service space, and network space need to be considered even when the actual 