Some of these methods are pretty basic and part of the job description: inspecting cells and common areas for unsanitary conditions and keeping a sharp eye out for drugs and weaponry. Even a toothbrush can become a lethal weapon if sharpened into a "shank."
Corrections officers (or "criminal justice managers") must also constantly check for tampering with locks, doors, and gates. Other officers inspect mail for contraband.
Some conditions are largely out of management control, such as heat or air conditioning, working hours, and crowded conditions.