Which tool should be used to closely monitor inputs and outputs?

Individual pro forma statements are financial documents that project future financial performance based on certain assumptions. While they provide valuable insights into anticipated revenues and expenses, they do not effectively illustrate the flow of inputs and outputs within a process, which is essential for active monitoring.

Joint financial statements combine the financial results of multiple entities, usually for partnership or joint venture analysis. Although they provide a comprehensive view of financial performance, they lack the specific focus on process inputs and outputs necessary for detailed monitoring of business operations.

Business process diagrams visually represent the sequence and flow of activities within a process. While they can illustrate processes well, they do not explicitly address the components of suppliers and customers, which are crucial for a complete understanding of inputs and outputs as provided in a SIPOC diagram.