«Supervision Matters» by Rita Sever

• The number one reason people leave their jobs is because of their supervisors.
(Gallup)
• It costs 16%–20% of an employee’s annual salary to replace entry-level and mid-level positions when they leave, and replacing a high-level executive can cost up to 200% of their salary. (CBS Money Watch)
• A good supervisor leads to improved employee satisfaction. When employee satisfaction improves by 5%, customer satisfaction improves by 1.3%, which leads to a .05% improvement in revenue. (Harvard Business Review)
• Employee engagement has been directly linked to the effectiveness of their supervisor—e.g., the employees working for the worst leaders rate only in the 4th percentile, and those working for the best leaders are the happiest, most engaged, and most committed employees. (Harvard Business Review)
• The Conference Board Report found that less than 1/3 of all supervisors or managers are perceived to be strong leaders. (HR Professional)
• The U.S. Bureau of Labor Statistics has found that employers with fewer than 100 employees provided only 0.8 hours—12 minutes—of manager training per six-month period, and organizations with 100–500 employees provide only 0.9 hours (6 minutes) of training for the same time span.