Delivery Model in general says that how are you going to delivery me what i ask for with effective reviews, Optimum usage of resources & cost.Testing Delivery Model.... What does it mean by? It is nothing but what type of model we will follow for the execution of a particular testing project. The model changes according to the domain & complexity of the project. For example, A banking project it goes with clear communication processes where in it starts with Proposal, Knowledge Transfer , Test Preparation, Management, Defect Management,Test Maintance & Automation.
So a Test Delivery Model works on what type of project we work for based on that only lot of things are decided & we proceed on....:)