This document sets the objectives of the functional exercise of the IOPES project, describes the exercise preparation design, and defines the evaluation strategy. Two functional exercises are planned to test and validate the innovative technologies developed in IOPES, one in Collsuspina (Spain), in May 2021, and another in Mosbach (Germany), in October 2021. Each exercise will be deployed as small-scale field emergency scenarios that will deploy a series of realistic emergency scenarios under controlled conditions. Finally, end-user feedback sessions will be conducted with all emergency services attending the exercise to validate and improve the IOPES technology.