At sites in operation, where a fire safety, smoke extraction or extinguishing system needs to be added or renovated, the consideration of your existing structures and operating constraints is decisive to the risk assessment process and your choice of technical solution. For that reason, before you launch your project, DOI can advise you after performing an in-depth diagnostic review of your specific issues and constraints, in order to determine the points to be considered to refine the design of your solution and ensure its compliance and reliability, as well as your continuous operations.