What is the fine-grained topic of the following text: After significant due diligence, Island Air selected RAAS on the basis that RAAS meets their complete functional criteria, and as well the RAAS technological platform offers an extremely flexible application delivery model that, combined with AIS implementation services, is essentially a fully provisioned turn-key solution. Only return the topic.
Island Air's selection of RAAS as a fully provisioned turn-key solution.