Job rotation is an operational control that requires employees to alternate through different positions within an organization. This practice minimizes the risk associated with a single individual having complete control over a critical process by dispersing knowledge and access among several individuals. It prevents any one person from having too much control or knowledge, which could be misused, and it can also uncover fraudulent activities. Mandatory vacations might temporarily remove an individual from control of a process but are primarily intended to ensure employees take rest. Time-of-day restrictions and user training involve limiting access during certain hours and educating users, respectively, but don't directly address the concentration of control over a process.