What input is provided when a carrier arrives back at the office after deliveries?

When a carrier returns to the office after completing their deliveries, they provide the operation number given by the supervisor for that day. This operation number is essential as it allows for proper tracking and organization of mail delivery activities specific to that day’s assignments. Each day, operations can vary due to volume, routes, or staffing needs, making the supervisor's designation crucial for logistic purposes.

The operation number helps in reporting and analyzing daily performance, ensuring that all deliveries can be accounted for accurately under the designated system for that particular day. This practice aids in evaluating efficiency, addressing any issues that arose during the deliveries, and managing overall postal operations effectively.