A senior risk manager at a US-based bank is working with the chief technology officer (CTO) on implementing a strong set of risk data aggregation and reporting practices at the bank that better complies with the Basel principles. The CTO asks the manager's opinion regarding potential challenges to this implementation given the bank's current practices. Which of the following observations about the bank's current practices is most likely to pose a challenge for the bank in complying with the Basel principles for risk data aggregation and reporting?