Creating a living specification using FIT documents

Using FIT for automated acceptance testing supports a process in which developers and customers collaborate on a single executable specification for each story, i.e. the FIT documents. By collaborating closely on the FIT documents, the developers and customers reach a shared understanding of the domain and develop the ubiquitous language of the application. Our experience with this process was ultimately successful but not completely pain free. In this experience report we highlight the benefits and pitfalls and share techniques for achieving successful developer and customer collaboration in specifying executable FIT documents.