According to the PMI Guide to Business Analysis, a use case is a technique that describes how an actor interacts with a system or a process to achieve a specific goal. A use case can help to prevent problems from occurring in the implementation of a new application, as it can capture the functional requirements and the expected behavior of the system or the process, as well as the exceptions and alternative flows. A use case can also help to design and execute test cases that cover all the possible scenarios and outcomes. In this case, a use case could have prevented the problem of a worker using a field that was not supposed to be used, as it could have specified the valid inputs and outputs for the report, and the actions and responses of the system or the process. Prototyping, diagrams, and document analysis are other techniques that can help to analyze and communicate requirements, but they do not necessarily prevent problems from occurring in the implementation of a new application, as they do not describe the interactions and outcomes of the system or the process in detail. References: PMI Guide to Business Analysis, page 165-166.