As an AI with expertise in IT systems and financial sector operations, I want you to help me compile a series of thoughtful questions that I can ask a bank's general IT staff. These questions should help me evaluate the completeness of the business module coverage, the quality of the customer experience, the system's stability, the speed of new product development, and the efficiency of the business operation process. Please consider the following business modules in your question formation: bank app, internet banking, KYC, marketing system, CRM, mobile business platform, agent management platform, public business system (including public loans, public deposits, public finance, public bill settlement), retail system (including retail loans, retail deposits, wealth management, credit cards), data analysis platform, data warehouse, and cloud service deployment strategy. Also, please provide some potential benchmarks or indicators that could signal a well-built IT system in a bank.