Tracking procedural success and complication rates over time is essential to maintaining high standards in surgical practice and ensuring continuous improvement.

Using CUSUM analysis, neurosurgical teams can:

• Detect early signals of performance improvement (e.g., during a learning phase).
• Identify sustained deviations above complication thresholds.
• Visualize performance stabilization, suggesting procedural mastery.
• Evaluate the impact of protocol changes, new technologies, or supervision levels.

Traditional audit methods often rely on aggregated data over long periods, making it difficult to capture short-term variations or early trends. CUSUM, by contrast:

• Offers a case-by-case timeline.
• Highlights inflection points in performance.
• Provides immediate feedback on individual and team practice.

With ongoing use of CUSUM:

• Residents can receive targeted feedback after specific case thresholds.
• Quality control committees can intervene earlier in declining performance.
• Departments can adjust supervision or training resources in response to real-time trends.

This approach turns data into strategy, reinforcing a culture of safety, accountability, and surgical excellence.