The majority of large organizations are moving ahead with service-oriented architecture (SOA), but a growing number are deferring plans, according to a survey by Gartner, Inc. Fifty-three percent of the respondents were already using SOA in some part of their organizations. Another 25 percent were not using it but had plans to do so in the next 12 months; and 16 percent had no plans to use SOA at all. Approximately 20 percent were building event-driven architectures (EDAs), and 20 percent were planning to do so in the next 12 months.
Since the beginning of 2008, there has been a dramatic fall in the number of organizations that are planning to adopt SOA for the first time. In 2008, this was cut by more than one-half, down to 25 percent from 53 percent in 2007, while the number of organizations with no plans to adopt SOA more than doubled from 6 percent in 2007 to 16 percent in 2008.
The number of organizations that are already pursuing SOA shows a massive change in the future perception of SOA, from something that is essentially inevitable for all organizations in a short time to a situation where many organizations have evaluated SOA and have chosen not to spend time and effort on it.
Gartner found that the significant minority that is not planning to adopt any SOA is a diverse group. The highest concentrations of organizations not pursuing SOA and having no plans to do so are in process manufacturing and agriculture and mining.
Overall, the two major reasons that organizations choose for not pursuing SOA are a lack of skills and expertise, and no viable business case. If the business case has been tested and is not viable, then there is no reason to do it. However, conversations with many Gartner clients have shown that there is a great deal of confusion about how to construct a business case for SOA. Even if a valid business case exists, then the required skills are often unavailable in-house, and the costs and effort to develop in-house skills and acquire outside expertise are often daunting.
The survey also found that the adoption of SOA and the plans for adoption vary widely by region. Overall, SOA adoption in Europe is nearly universal, moderate in North America and lagging in Asia. In Europe, current adoption rates are very high, and only a tiny percentage of organizations having no plans for adoption in the future. In North America, the adoption rate is high, but a low number of organizations have committed to adopt SOA in the next 12 months, and a fairly high proportion has no plans to pursue SOA. The picture in Asia is quite different, where adoption is less than half of that in other regions, and where the majority of organizations are not planning to pursue SOA within the next 12 months.
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