The Development of Prototype phase is an 8-month phase in which four contractors refine and increase the level of detail of their designs and organise tests of all user-facing ICT-systems. The design level is as detailed as possible without the requirement to constitute construction drawings. Planning and calculations should be final. The use of the Co-Design procedure should be intensified. This phase aims to turn the schematic design to detailed designs preparing all parties involved for rapid implementation; and to give future users the opportunity to test all ICT-systems. The total procurement budget in Phase 2 will be 2.3 million euro.