This deliverable provides details of the Case Study design methods and process to be deployed in the project. The design incorporates an instantiated eight-stage process consistent with and enhanced Multi Interdisciplinary Research (MIR) framework as previously elaborated in GREAT D4.1. The document provides implementation detail for all stages of the Case Study process with hyperlinks to the required supporting documentation and details of a logic model of evaluation. The deliverable, which is a public document, is written to support consortium partners in undertaking research activities in the project as its primary audience. It is , however, anticipated that due to the scale-able nature of the design that future iterations of the design could inform future Case Study research in digital domains involving citizen science and where citizen agency is a primary objective. There is no assumption that all Case studies will conduct all stages of the process though cumulatively all stages will be implemented and evaluated over the sum of the GREAT case studies undertaken over the duration of the project. The Case Study is the primary research instrument deployed in the GREAT project.