Deliverable 5.1 ���Business case Implementation Guidelines��� is the first deliverable of WP5 led by EV ILVO. The objective of this deliverable is to provide a common framework for project partners involved in business cases to ensure the smooth progress of the WP5 and establish efficient communication between the different project partners and the lighthouse customers. ��� In the first section, the general objectives, tasks and deliverables of the WP5 listed, and all Business cases (BC) are summarised and presented in an informative manner to help BC actors follow the vision of the Envision project declared in the grant agreement. ��� The second section, which is the actual contribution of this deliverable, declares the actor roles, the scheduled activities within the WP and the mapping of those activities to each role. This way, we describe clearly: which role is doing what. ��� The third section goes one step further: It assigns per business case the actors to the roles. This way, we describe clearly per business case: which actor needs to do what and with whom.