While I was contemplating with an idea of Product-Line Architecture concept to a series of projects in my company, it triggered me the thought of comparing the same with Service-Oriented Architecture. I plunged myself into this comparison of Product-Line Architecture and Service-Oriented Architecture and the journey was quite interesting and insightful.
I also saw that CMU is doing lot of work in bringing the synergies between the two paradigms. The university views that both paradigms can complement each other and each can add value to the other at broader architecture level - Applying Service-Orientation to the Product-Lines and Applying Product-Line approach to Service-Orientation / Composition. While I completely agree with this idea, I believe a greater synergy can be achieved when they are applied at their respective contexts, where they are best at.
To explain a bit more, in one of the scenarios, SOA and Product Line Approach can perfectly co-exist, where SOA addresses the interface part of Services and Product-Line addresses the implementation of components behind the services. The Product Line concepts can be applied to model the service inventory within a specific domain in the enterprise. Applying Product-Line concepts to the implementation portion of SOA will significantly benefit in terms of accelerating the development time of services.