Solution as a Service is a top-tier concept. The first tier is infrastructure as a service, where third-party providers host computing resources. The next step is platform as a service, in which a third-party provides a platform upon which businesses can manage, run, or build web applications. Next up is software as a service, which allows businesses to access software through the cloud.
Solution as a Service is a step beyond software as a service. It provides businesses with the hardware, software, and knowledge necessary to manage the ongoing configuration, improvement and support of their business applications effectively. Solution as a Service is, as the name implies, is a complete solution. Most often than now, Solution as a Service can be delivered on a cost per transaction, or perhaps cost per process basis making the entry costs of organisations low and lowering the cost of entry even for smaller organisations to leverage best in class processes and technology.