Great observation. As with most IT trends (SOA, ESB,
etc) they simply a means, not an end.
Here's how I see it:
From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Anne Thomas Manes
Sent: Wednesday, February 22, 2006 12:42 PM
To: [email protected]
Subject: Re: [service-orientated-architecture] SAAS vs SOA
SaaS is a business model that applies to organizations whose primary product is software (i.e., software vendor). These vendors can license the software to other organizations who will deploy it and run it as they deem fit, or the vendors can host the software (either themselves or through a service agency) and licenses user subscriptions to the software.
The classic example of a SaaS vendor is Salesforce.com.
A SaaS application does not need to be service-oriented, although service-orientation would be a valuable feature in that it will enable easier integration with other software.
SOA is a software design discipline in which application functionality is implemented as reusable services that can be shared by many different applications.
Organizations whose primary product is not software ( i.e., not a software vendor) should not be thinking in terms of SaaS. Non-vendors should be focused on selling their business services (healthcare, financial, manfacturing, etc). Very often delivery of these business services involves the use of software -- but the software is simply the means to the services -- not the service itself. If you are a financial services company specializing in settlement services, then you are selling settlement services, not software services -- even if the settlement service is implemented using software.
Anne
On 2/22/06, Paul Denning <[EMAIL PROTECTED]> wrote:I am trying to reconcile or form a mental model of Software As A
Service (SAAS) and SOA.
How does an On-Demand Application (ODA) relate to a "service"?
How are they (SAAS, SOA) similar and how are they different?
Thoughts?
Any good links?
Paul
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