WP7 plans the detailed specifications and the validation framework for wearable systems. The requirements will cover functional, energy efficient design aspects at all levels with the aim of obtaining high efficiency, scalable, frictionless (weight, size, acceptability, privacy, etc.), sustainable and goal oriented solutions capable to meet the emerging demand on specific applications (in frailty, cardiovascular and active fife-style). Clinical experts will be involved via collaborations, networking but also like direct partners. This WP will also establish a quality management system throughout all stages of design, development and validation of the system and will prepare strategies for evaluation studies with the prototyped wearable systems.