Every Salesforce administrator and architect has been there: you need to answer what seems like a simple question about your org, and three hours later, you’re still clicking through Setup pages, cross-referencing spreadsheets, and writing SOQL queries.
“Is the Account.Industry field actually being used anywhere?” sounds straightforward until you realize checking requires examining page layouts, validation rules, workflow rules, Process Builders, Flows, Apex code, Lightning components, and actual data population. Each source demands different tools and techniques. Miss one, and your analysis is incomplete.