# SCoPE: Service Composition and Personalization Environment
## 3 Background and Literature Review
In the CBE context, a single provider probably might not be able to cover all care needs of a customer, since a service provider typically has its area of service application and a customer typically may have needs (required services) of various areas. As such, service providers may get together in alliances aiming at the creation of composite services which can meet the entire customer's care needs. As a composite service may involve several service providers, require various devices and a support infrastructure, depend on another service or resource, involve people and frequent information exchange, etc. [10], managing all these elements and relationships with efficiency is indeed a significant challenge. **Care Service Personalization**: the notion of service personalization means that a service is tailored to fit each individual [4; 5; 6; 9; 53]. For several authors, e.g., [4; 8; 9], personalizing a service covers an agreement between customers and providers (and possibly other involved stakeholders) through which they share information to be organized intelligently and adaptively. The effective establishment of a CBE requires, in fact, a proper understanding of the customers' profile in order to ensure that offered services are both competitive in market terms and relevant to the individuals. Some customers may require distinct types of care services to satisfy their particular needs, which lead to the notion of personalized services. If the elderly and family are satisfied with the provided service, they feel like an exclusive customer and are inclined to keep loyalty towards the service provider [4]. Collecting feedback information in this context can help service providers to deliver better-personalized services. Direct communication with customer representatives remains the most preferred channel for consumers and small companies with few customers. In this scenario, it is \"easy\" to personalize customers services [8]. However, businesses (e.g., care service providers) with many customers need to seek multiple information sources to achieve personalization, using both human interventions and automatized mechanisms. These feedback acquisition transactions can be efficiently handled through ICT strategies like Internet of Things (IoT) devices and tele assistance [11; 54]. In the elderly care domain, it is primordial to understand the customer, her/his limitations, and longings, as well as the elderly living environment and associated stakeholders [7]. As a consequence, a personalized service package is likely to be provided by some providers working together, acting as a virtual organization. **Care Service Evolution**: service evolution is the process of maintaining and evolving existing care services to cater for new requirements and technological changes [55]. The CBE needs to constantly monitor the context and, for each new context change, to analyze the situation, plan the service evolution, and implement the evolution to fit that context. An evolutionary ambient assisted living system is suggested by [PERSON], [PERSON] [28] following this vision, but their focus is on a techno-centric evolution and adaptability of the system, and ignore the service providers and stakeholders. More recently, new developments appear to address user-stakeholders-centric services, combined with ICT, to offer services non-dependent of a place and time [18; 56; 57]. Under this perspective, the notion of evolutionary service [5; 11; 18; 53] means that the provided service adapts to the customer's needs, environment and any changes that affect the customer's life context, as well as CBE demands, new regulations, and technological requirements. In the literature, researchers present partial solutions for service composition [29; 58], service personalization [11; 21; 59] and service evolution [28; 55], mostly considering single service providers and comparison between isolated services (not combined with the service provider).