Final answer:
The best way to measure service level for time-slot delivery is to calculate the percentage of deliveries made within the specified time slot.
Step-by-step explanation:
When measuring service level for time-slot delivery, the best way is to calculate the percentage of deliveries that are made within the specified time slot. This is typically done by dividing the number of on-time deliveries by the total number of deliveries, and then multiplying by 100 to get a percentage.
For example, let's say a company made 80 out of 100 deliveries on time. The service level would be 80%.
Other metrics that can be considered when measuring service level for time-slot delivery include average delivery time, average delay time, and customer satisfaction ratings.