Methodologies for Design of Service-Based Systems - Intentional Perspectives on Information Systems Engineering - page 311

Future work should consider this research direction which has the advantage of
preserving in service design a general concept of service, linked to business goals,
rather than focusing on service-oriented technology already in the initial phases.
Other aspects which have been discussed with respect to adaptivity in this chapter
should also be linked to the intentional-based approach.
The quality of service aspects are one of the basis for service selection in related
work, and there is a need to relate also business requirements related to quality to
service descriptions at the design level, as well as defining the strategies to select
the appropriate actions at run time to be able to maintain the quality of service levels
specified at design time. The approach of [10] , which leaves open the selection of
services at run time, could provide a sound basis for adding also QoS considerations
at design time in view of run-time adaptation.
Other aspects which should be considered during service design concern the
context of use of services. Also in this case the variability elements which can
be specified in an intention-based approach can be the basis for defining process
variants based on context definition.
Other aspects which need more consideration in IT service-based approach are
related to the concept of service in general. In fact, IT services are often used
within real world services, and it is sometimes difficult to distinguish between
the technological and non-technological aspects of service provisioning and ser-
vice consuming. A holistic approach to service design should also consider general
parameters, which, linking requirements to enactment, consider both characteristics
of IT services and those of related real world services. Among the elements to be
evaluated is the total cost of ownership of services, including all relevant aspects
of service in the complete life-cycle, from design to flexible and adaptive service
provisioning.
Acknowledgments The research leading to these results has received funding from the European
Community's Seventh Framework Programme FP7/2007-2013 under grant agreement 215483
(S-Cube).
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