This document provides a diagnostic tool to help HR and business leaders determine if restructuring is the appropriate solution to address business challenges or opportunities. The diagnostic involves interviewing functional and business unit leaders to assess challenges and goals. It then evaluates five potential root causes of performance issues: strategy, talent capabilities, rewards, processes, and structure. The responses are analyzed to identify the most pressing challenge, and action plans are provided to address non-structural issues. If structure is identified as the root cause, then restructuring should be considered.