You might want to check if it is possible to get a patient call system report that provides average call bell response time by time of day. If available, you might want to use a run or control chart to examine patterns of either short response times or long response times by time of day and day of week. If patterns exist, you could study them so that you could build on the processes where response times are short and eliminate processes where response times are long. If a report is unavailable, consider collecting data by recording call bell response times for an hour during randomly selected hours of the day and days of the week. You might also use a run or control chart to track patient responses to the call bell question on your patient satisfaction survey. How would you determine if improvements to responsiveness to call bells were sustained?