Supervision, Leadership, and Personnel Management
The sergeant is the hinge between management's orders and an officer's daily work. Know the structural concepts cold: chain of command (orders flow down, information flows up), unity of command (one supervisor giving direction on a given task - dual supervision is a classic distractor that is always the wrong answer), and span of control (how many subordinates one supervisor can effectively direct; most agencies aim for roughly 3–7, with 5–6 as the practical target). Distinguish delegation (authority passed down, accountability retained) from abdication.
Leadership styles: autocratic, democratic, laissez-faire; situational leadership (match style to the follower's maturity and the urgency of the task); transformational versus transactional. Motivation theory shows up regularly: Maslow's hierarchy, Herzberg's two-factor theory (hygiene factors such as pay and policy prevent dissatisfaction but do not motivate), and McGregor's Theory X/Y. If a question asks why a raise stopped motivating an officer after a few months, the answer is Herzberg.
Personnel management means progressive discipline (documented counseling, reprimand, suspension, removal), just cause, and the Garrity rule: statements compelled from a public employee under threat of termination cannot be used against that employee in a criminal prosecution, but they may support administrative discipline. A supervisor who orders a statement must deliver the Garrity warning and treat the statement as administratively compelled.
Traps: assuming Garrity bars discipline (it does not), assuming a Garrity statement can never be used at all (it may be used for impeachment and to develop leads), and treating a training deficiency as misconduct.
Rule of thumb: if it is not written down with a date, time, and who said what, it did not happen. Document contemporaneously.