Principles for the application of mixed reality as pre-occupancy evaluation tools (P-OET) at the early design stages

The implementation of two pre-occupancy evaluation tools (P-OET) demonstrating the feasibility of using mixed reality are documented. The focus is on the early design stages, where relative merits of distinct options are being considered. For proof-of-concept, a simple architectural design context was used – the simulation of a typical commercial office environment. Four principles underpin the specification of a Virtual Reality (VR) prototype: (1) quasi-realistic graphics and low geometry models; (2) a multi-sensory approach (3) the capacity to evaluate changes in temporal context (4) evaluation via a task-based approach, combined with voice recordings and activity tracking. The second prototype uses Augmented Reality (AR) technology to compare design options where interactive virtual models appear on a conference table. Evaluation of the prototype applications is discussed: VR POET proved highly feasible and demonstrated the effectiveness of the four principles above; AR POET showed potential but is constrained by the functionality of available hardware.