The sound design process cannot begin until we receive answers to some specific questions. What are you going to use a sound system for? What is the room shape? Where is the stage? Where can we put speakers? The list goes on forever but we can focus on some of the most important ones.
specification n. detailed description of construction, workmanship, materials, etc. of work (to be) undertaken by architect, engineer, etc.
specify v.t. name expressly, mention definitely (items, details, ingredients, etc.).
Concise Oxford Dictionary