Which factor does NOT influence whether discipline is firm and fair?

The number of years on the job does not directly influence whether discipline is firm and fair. While experience can certainly provide a police officer or supervisor with valuable insights into their role and the nuances of disciplinary actions, it does not inherently affect the principles of fairness and firmness in discipline.

Discipline's effectiveness is more directly tied to the quality of personnel recruited, as having a well-selected team can lead to a culture that values accountability and fairness. Additionally, the training given to newly promoted sergeants is crucial for ensuring they understand how to apply disciplinary measures appropriately and consistently. Support from superiors also plays a pivotal role, as it helps reinforce a culture of fairness and helps promote a consistent approach to discipline. In contrast, the length of time someone has been in their position may not necessarily correlate with their ability to implement discipline effectively.