The objective of the present deliverable is describing the last activities of design optimization and usability assessment with project end users and external stakeholders. Starting from the previous evaluation activities and from the suggestions received from the MTR, the design solutions to improve the data visualization and interaction are presented. These solutions have been object of a design review, aiming at discussing and validating the solutions before to implement them. Finally, the updated version of the VISCA dashboard UI has been finally introduced and assessed with a wider sample of professionals. The methodology and results of the remote usability inspection are presented and commented in terms of potential developments of VISCA.