Abstract:
In Cloud Computing Infrastructure or other eBusiness raised areas, Service
Level Agreement (SLA) is an important element as it decreases the
consumer’s dependency on corresponding providers. In Service Oriented
Infrastructure (SOI), Service Level Agreements are electronic contracts
among service providers, consumers and its services. In this thesis, we
are aiming to describe a SLA Aggregation model with hierarchal arrangements
like service value chains and Business Value Network (BVN). In
the hierarchy of SLAs, SLAs alongwith contractual information, are desired
to be controlled for security, trust and privacy concerns; we applied
our proposed SLA-ViewZone Pattern on novel business scenarios resulting
in SLA aggregation patterns represented on our SLA Business Process
Model Notations (BPN). Proposed SLA-ViewZone template is used to assure
the trust and privacy of stakeholders in SLA Choreography as by
business point of view each business has its own private information. The
whole network of SLAs along with service Choreography which describes
its proper approach is recognized as SLA Choreography. We introduced
several SLA aggregation Patterns and extended SLA Aggregation Functions
based on SLA aggregation formal and notational model. This approach
makes the process of SLA aggregation corresponding to the hierarchical
service composition simple and understandable. We applied our
proposed notations, SLA Aggregation Patterns and Aggregation functions
on several business models to fostering BVNs. Further we classify SLA
Aggregation Patterns into main classes; Topological Patterns and Value
Network Patterns which sortouts the aggregation patterns at hierarchical
level. These SLA Aggregation Patterns and SLA Aggregation Functions
play a pivotal role in the formation of inter-organizational business process
management, BVNs and service value chains etc.
