Is it true that if a firm calculates its days sales outstanding it has no need for an aging schedule?

No, it's not true that calculating days sales outstanding (DSO) eliminates the need for an aging schedule. While DSO provides a general measure of how quickly a firm collects receivables, an aging schedule offers detailed insights into the status of individual accounts receivable, including overdue amounts and potential collection issues. This granularity helps firms manage credit risk and optimize cash flow more effectively than DSO alone. Therefore, both metrics serve different but complementary purposes in accounts receivable management.