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ITIL :: View topic - ITIL and SOA
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ITIL and SOA

 
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morpheous2020
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Joined: May 14, 2007
Posts: 15

PostPosted: Sat May 19, 2007 4:34 am    Post subject: ITIL and SOA Reply with quote

Are there any ties or associations between ITIL and Service-Oriented Architecture within an IT organization? Can the two co-exist?
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Ziad
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Joined: Sep 27, 2006
Posts: 91

PostPosted: Sun May 20, 2007 4:45 pm    Post subject: Reply with quote

A personal thought:
Besides the overhead caused by repetitive "activities", I cannot see why they cannot co-exit. SOA is mainly about establishing communication processes and is very commonly used when consolidating infrastructures/data enters. However, there are very well defined interfaces in ITIL that can enable an organization to run smoothly without a need of SOA on top of ITIL. On the other hand, SOA is not easily proving value as opposed to ITIL.
So, I believe that they can co-exit but SOA will not add value to ITIL, I do not know how things will be the other way round (ITIL adding/"not adding" value to SOA).

PS: I am not criticizing SOA as I do not have much information about it, so I am just putting my thoughts on paper.

Regards,
Z!
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jpgilles
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Joined: Mar 29, 2007
Posts: 123
Location: FRance

PostPosted: Tue May 22, 2007 4:24 am    Post subject: Reply with quote

Well it depends what you call SOA.
To me SOA is truly part of ITIL (infrastructure management): as part of service level management, you may well define that some business processes and thus IT systems require high level services (like 24/24 - 7/7 , 4H interuption maw per month) where some others do not, and users would be happy with 7.30-19.30 Mon-Friday guaranteed availability , with possible interruption every week-end.
If you plan to run both types of services on similar types of platform (looking for homogeneous environemnts) you will have to salign with the highest resquirements which will let you fall in the following trap:
* you spend too much for the service required as you do provide high availability environments for all, including thoses services which do not require it
* you jeopardize your maintenance windows as, by sharing some resources (let's take disk space as an example) between critical and non-critical environments you create dependencies and will be able to perform mainetnance operations on non critical systems only during the maintenance windows authorized for the critical systems.

Therefore, if you have different classes of services , you may well think about designing architectures aigned with service level requirements, and separate critical and non critical environements.

That is my understanding of Service Oriented Architecture in teh ITIL context.
If there is another meaning to SOA, I woul be pleased to learn about it and possibly integrate it with the ITIL approach.

BR
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Fabien
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Joined: Sep 27, 2005
Posts: 207

PostPosted: Wed Jun 13, 2007 1:33 am    Post subject: Reply with quote

I think this information will be useful:

Service Design, page 48: Service Oriented Architecture.

"Business Process and solutions should be designed and developed using the Service Oriented Architecture (SOA) approach. The SOA approach is considered best practice and is used by many organizations [...] SOA is defined by OASIS (www dot oasis-open dot org)"
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Fabien Papleux

Accenture
Technology Consulting | Service Excellence
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alphasong
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Joined: Mar 03, 2007
Posts: 33
Location: Minneapolis

PostPosted: Thu Jun 14, 2007 11:15 am    Post subject: Please. Folks. Reply with quote

Much of what's been said here is a bit off base. SOA is about the software development lifecycle. Please go check out Zapthink first.

However, after you get the basics from Zapthink, then check out Martin Fowler's ServiceOrientedAmbiguity article. (Google it - I can't paste any links here.)

Quote: "I think SOA has turned into a semantics-free concept that can join 'components' and 'architecture'. It's beyond saving - so the concrete ideas that do have some substance need to get an independent life."

If you follow some of his other links you will find further interesting debate and skepticism.

In the hierarchy of the SDLC community, Martin is one of the heaviest hitters. I would therefore say SOA pretty clearly has NOT been proven to the point it can be called "best practice," not by a long shot. As with value networks, the ITIL v3 authors have jumped on a fad bandwagon.

-Charlie
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Guerino1
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Joined: Jan 01, 2006
Posts: 500
Location: New Jersey

PostPosted: Sat Jun 16, 2007 3:22 am    Post subject: Re: Please. Folks. Reply with quote

Hello all,

alphasong wrote:
In the hierarchy of the SDLC community, Martin is one of the heaviest hitters. I would therefore say SOA pretty clearly has NOT been proven to the point it can be called "best practice," not by a long shot. As with value networks, the ITIL v3 authors have jumped on a fad bandwagon.


I agree with this statement. Service Oriented Architectures (SOA) are specifically about one of many different design paradigms that can be used for designing and implementing systems. It's not necessarily right or wrong. It's simply an option. To say that it is a best practice shows a weak knowledge and understanding of the paradigm and its current position in teh open market, as different paradigms make sense for different situations as well as because (according to research entities such as Gartner research) the entire world is still struggling to see where SOA will go and how it will fit. Many enterprises and architects talk about it but very few have actually implemented it.

I hope this helps.

My Best,

Frank Guerino, CEO
TraverseIT
On-Demand ITIL
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