Leaders may hear about problems within the business from managers and other employees. They can also look for patterns in the statistics, such as high turnover or abnormal use of sick days. As they walk through the halls of the business, they may notice employees are disengaged or not as joyful as they once were.
When a leader notices these changes, it is their responsibility to find out why this is they are happening. Using a method of collecting feedback, such as an anonymous employee survey, to gather information about the current work environment is a strong example of effective leadership in this scenario.