This question falls under Measurement and Analysis , specifically understanding different types of performance measures. In CPXP and quality improvement frameworks, process measures evaluate the steps or activities involved in delivering care , rather than the final outcomes. Option B (Wait times for lab test results) is correct because it reflects how efficiently a process is functioning—specifically, the timeliness of diagnostic services. Option A (patient satisfaction) and Option C (rate of hospital-acquired infections) are outcome measures , as they reflect the results of care. Option D (length of hospital stay) is also typically considered an outcome or utilization measure. CPXP emphasizes that improving patient experience requires focusing on processes that influence outcomes , making process measures critical for identifying opportunities for improvement and monitoring operational performance