Extra-low-voltage integration can involve many technologies, but the starting point should be the people who will use them. Describe the operational need before selecting individual devices. A collection of compatible products does not automatically form a coherent building system.
Identify user groups and the functions available to each. Consider routine operation, administration and maintenance separately. These discussions help establish system boundaries without collecting unnecessary personal or security-sensitive information in a general project brief.
Define integrations explicitly. State which system originates an event, which receives it and what response is intended. Ownership of configuration and ongoing support should be understood alongside the technical connection.
Coordinate infrastructure with future access in mind. Equipment locations, cable routes and available capacity affect maintainability and change. Future flexibility should be described through practical provisions rather than an unlimited promise of compatibility.
Agree acceptance criteria that reflect actual use. Demonstrations should establish that the defined functions and interfaces work in the installed environment. A successful device test is one part of that evidence, not proof that the complete user workflow has been delivered.