Best practice on creating composite services

Good afternoon, experts.
I was wondering what would be the recommended way to create a new enterprise service that is basically the orchestration of other enterprise services, for example, already provided by business suite. I guess I can model the orchestration and even the transformation rules through Netweaver Process Modeler and then export it as a service. I think it is also possible to model it as a Visual Composer application and then export it as a web service. Finally I believe there must be a way to do it using purely PI.
So, what is the recommended way? Pros and cons?
Regards.

Hope these best services and white papers from different organisations would help you to understnad on composite services
https://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/805d8c2d-0e01-0010-a694-a94109e88f2a
http://publib.boulder.ibm.com/infocenter/ieduasst/v1r1m0/index.jsp?topic=/com.ibm.iea.wsapiw/wsapiw/5.0/Next_gen_tech/P13_SAP_NW_CE_7_1/player.html
http://www.msit.mut.ac.th/member/filemanager/share_file/5017640013/SAP/SOA-PTT_Level-1/07%20Service%20composition%20and%20modeling_261.pdf
regards
nag

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>>Cloud Services are not Sql Server (obviously) but that led to the question - Is there a list of best practices for Azure Cloud Services? If so, what are they?
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Best practice on creating composite services

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