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SOA IMPLEMENTATION - KEY THINGS TO BE KEPT IN MIND

S.noObjectiveDetails
1Prevent Duplication of Services . Ensure Active Application ManagementSOA needs active management of the collection of services (Service Catalogue) in order to prevent duplication of services during implementation of new functionality. Application Managment must be prepared for this task



2Ensure familiarity of Service Concept with all Stake holders to prevent bad decisionsAll stakeholders (Business, Application Managers, Architects, Developers) must be completely aware of the service concept. Any misunderstanding within the stakeholders may lead to bad  decisions. When a Business is not clear on service concept ie a service built on one system could be reused in another system if the need and capability matches, there is a possibility of duplication/re building same service  in different systems. When a Traditionally educated designer only knows about object orientation, there is a danger that he will make the service too tightly coupled to that actual function 
3Granularity of service - Finalization during DesignThe Granularity of service ie, How much functionality it should cover should be resolved during the Design not at earlier stages as the discussions would become unmanageable and meaningless if the discussions are not related to actual analysis of functions
4Ensure Business Model Layer is accessed from Service Layer and not directly from presentation Layer - Avoid ShortcutsIt should be a rule that the Business Model Layer should be accessed via Service Layer not directly from the presentation layer. It would be tempting for developers to call business class operators directly from presentation layer especially when system is still isolated  and not yet connected to other application  or presentation layers , service layers seems redundant and also due to strict project deadlines. Such shortcuts will have a disastrous effects on time to market for future developments
5Ensure workflow related functions are outside service layerAll workflow related functions should be kept out of  the service layer. When the order of a series of  functions depend on external knowledge that is not available in the system , It is advisable to put its control in a separate work flow layer
6Use of tools that force consistency between UML Models is recommendedUse of tools that force consistency between UML Models is recommended

 Top Comment : prasad narasimhan   | 12 29 2008 23:49:11 +0000
An excellent thought in terms of layering and the standards which needs to be essentially followed when crafting a SOA approach
 
6 comments on "SOA IMPLEMENTATION - KEY THINGS TO BE KEPT IN MIND"
  Commented by  Viktor Stephen, COO, Business Mashup/Partner Get.Next.Job    | 06 05 2009 06:00:43 +0000
Thanks for sharing. 
  Commented by  KVVKSN Murthy, Project Manager, MGT    | 06 04 2009 08:57:19 +0000
Very excellent and precise on SOA process
  Commented by  JAPI, HR Manager, ACME Consultants    | 01 13 2009 06:11:26 +0000
Thanks for sharing
  Commented by  Bellala Gopinatha Rao, Project Manager Promax Management Consultants    | 01 02 2009 14:32:30 +0000
excellent , Thanks
  Commented by  prasad narasimhan, Tech Architect, Cognizant Technology    | 12 29 2008 23:49:11 +0000
Rating : +1 
An excellent thought in terms of layering and the standards which needs to be essentially followed when crafting a SOA approach
  Commented by  varsha ., Technical manger(QMS)    | 12 28 2008 16:57:25 +0000
very nice.....
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