What type of change might a supervisor need to address when an employee's drinking affects performance?

Addressing an employee's drinking that negatively impacts performance primarily involves a behavioral change. This type of change focuses on modifying the employee's behavior, which in this case refers to the drinking habits that have directly influenced their work performance. Supervisors play a crucial role in identifying behavioral issues and implementing appropriate strategies to encourage healthier choices, promote accountability, and facilitate support for recovery.

Recognizing the need for a behavioral change means that the supervisor must engage with the employee, potentially through counseling or performance improvement plans, emphasizing the importance of making positive changes to meet work expectations. This approach fosters a supportive environment where the employee can work towards overcoming their challenges and enhances overall team performance.

The other options do not directly address the core issue. Personal change may involve broader aspects of the employee's life but does not specifically target the behavior affecting performance. Job reassignment may be a temporary solution but doesn't resolve the underlying behavioral issues causing poor performance. Attendance change relates more to frequency and punctuality at work, which, while possibly affected by substance issues, does not encapsulate the necessary focus on changing the drinking behavior itself.