The Architecture section of develoeprWorks has released another Insight and Outlook column entitled: What is IT governance, and why should you care? Here are my views. I start by what I think IT governance consists of and how SOA governance relates to it. Then I describe what I have seen as the important aspects of governance that need to be taken into account. My observations are based on my interactions with clients and the issues they run into day-by-day. I think governance, specifically, SOA governance, is an "umbrella" that encompasses other assets and offerings such as SOA assessments, SOA Strategy and Planning , SOA Methods (such as SOMA), SOA Maturity etc. It lends them the oversight and support based on a set of agreed-upon enterprise policies that will ensure quality of service within the soa life-cycle.Also, Michael Liebow, VP of SOA within IBM Global Services describes his views on the state of maturity of SOA in the industry in an interview with SearchWebServices. Here is an excerpt relating to maturity, which is, in my opinion a governance issue. "SearchWebServices: Along those lines, how many companies have you run into that would earn a certificate of occupancy for their SOA? Liebow: Here's the deal, we've done thousands of implementations and nobody I know of has the full house built. We offer to the industry a maturity model for service-oriented architecture and there are seven levels of maturity within that. The first level of maturity starts around siloed applications. The notion though is that you get alignment between the business and IT, so that you have a business architecture, the application architecture, the infrastructure, the whole alignment from top to bottom in your organization. Level two speaks to the notion of EAI and essentially proprietary integration. Level three talks to the really decade-old notion of SOA, which was around components. These were not the same types of components we're talking about today, but around CORBA, COM, whatever. They were still somewhat hampered because they were hard-wired, but this is not a new concept. People have been trying to do this for a long time.Level four is where we get to services integration. It's Web services-based. You're able to expose services to be connected. We call it SOI, for services-oriented integration. It's an approach to integration that's much more flexible. And we think that most organizations we work with are trying to get to level four. The majority of organizations today are somewhere between one and three. Level five gets you to composite applications.SearchWebServices: Is it a rarity to see a company at level five these days?Liebow: You can see examples of level five and organizations that are starting to get there. They're real leaders in their industries. By no means would I say they have a full house, but they are pinpointing areas of the business where they want to build that capability. Yet the industry as a whole is just on the verge of touching this area. There are a number of startups that are providing aspects around this, but the major vendors don't really provide this.We think that the majority of the industry is just trying to get to level four. They are trying to articulate a vision around level five. Six and seven speak to a level of dynamic sense and response, automatic, autonomic systems that's a future state. No one's there to any significant degree."
BPM, APIs & Service-oriented Architecture: Insights and Best Practices
From archive: April 2006 X
Ali_Arsanjani 120000D8QB 2,975 Views
Ali_Arsanjani 120000D8QB 2,877 Views
A previous version of the SOA Reference Architecture, Solution View was discussed in the Architectural Template section of Service-oriented Modeling and Architecture and in Bobby Wolf's recent posting on Composite Services .
We have found it important to add a few layers and make a lot of refinements. The meta-model describes each layer, the architectural building blicks in each layer, patterns of interaction and architectural decisions needed in each layer.
These layers are:
1. Consumer layer - any consumer of a service would reside in this layer
2. Business process layer (choreography and composition)-- a process uses a set of loosely coupled services in a choreography or composite application
3. Services layers -- a layer of service descriptions and policies, implemented through
4. Service Components -- (e.g., EJB's or .NET components) who privide the actual realization of the service operation, or the service directly uses or exposes
5. Operational Systems and Data -- which include packaged applications like SAP, Siebel, PeopleSoft (Oracle), Legacy systems, and of course the data bases that support the applications.
cross cutting these functional layers are the operational layers that support and intersect the above:
6. Integration Layer -- if you need/have an ESB it's here
7. Quality of Service layer -- all, aspects of security, monitoring, management and all other quality of service aspects are implemented and ensure through this layer
8. Data Architecture, Business Intelligence and meta-data layer -- provides data models, star cshemas or meta-data relating to and supporting the SOA
9. Governance Layer -- includes the procedures, processes, registry , repository and run-time governance needed to servce as support for the entire life-cycle
If you are interested in the details, and the above jives with what you are looking for, let me know. Comments welcome.[Read More]
Ali_Arsanjani 120000D8QB 2,287 Views
The Fibonacci sequence is a mathematical progression that starts with 0 and 1 and then continues to add numbers to this sequence that are equal to the sum of the previous two numbers. Thus, the first seven numbers in the sequence are: 0-1-1-2-3-5-8. People have started writing poems to this sequence since a blog posting on blogspot by a screenwriter/children's writer a couple of weeks ago. This is sort of a variation of the more restrictive haiku which usually consists of a pattern of 5, 7, and 5 morae, phonetic units (usually deemed to correspond to the syllables of a language). Poems often follow patterns, as a guiding element; loose standard or template.
In order to form and flourish, Service eco-systems also need to conform to patterns, to flourish with the implementation of their best-practices and with standards to provide them with general guidance, even if this is only to provide a means to extend or use only relevant parts of the standard in more realistic cirtcumstances. SOA Governance distributes policy for compliance with standards, inclduing acceptable extensions as well as templates ofr workproducts such as the Service Model, which includes the categorized Service Hierarchy among other elements.[Read More]
Ali_Arsanjani 120000D8QB 1,537 Views
Companies who want to collaborate and are in fact, business partners can do so in two ways: proprietary and standards-based.Standards-based is most flexible but covers a spectrum of industry standards such as ACORD for insurance to a standard XML Schema with pre-agreed tags. This is the spectrum of standards-based interaction. As we move from a few instances of collaboration and access to one another's business processes, the adoption of industry standards based on XML becomes more important: the rules of engagement are well-understood and have been well thought-out by a an industrty body or consortium. The downside of this is that often the industry standard is too broad and all-empassing making its use cumbersome and company's end up using only a fraction of the standard. Standardized message structures across Lines of Business within the enterpise and gradually across the eco-system become increasingly important.[Read More]