Hi @SM123 ,
This is a term that does not have a standard definition. Your organization, or whoever gave you this requirement, will need to define what this means and how to access these records.
Use the business services or business application table. Build out a business application database. Management should then define the tier of the application there, and develop a process to manage that listing. Tiers are usually defined by impact to business if they are down, your company would need to define this. Dot walk the CI when its a business application to the tier whenever you have an incident, or dot walk from the server to its related business application to its tier. Server to business application relationships would need to be generated obviously.
