The final opening time slot can produce sales and take hours of staffing, consumption and closing activities. The assessment should compare the contribution of sales with actual modifiable costs. Attributing all daily costs to that time slot can make the comparison misleading.
The shift in purchases must also be observed. Some customers might arrive earlier if the time changed; others might choose a competitor. Limited trials communicated clearly can help you understand what effects occur in the context of the store.
Imagine a business that receives few customers in the last half hour. The value of those purchases should be read along with the frequency with which the same people return and the possibility of serving a specific need. The simple daily average hides this distribution.
I propose to compare similar days and to collect unfulfilled requests during the test. The final choice must take into account the working conditions and applicable commitments. A useful timetable arises from the relationship between accessibility of the service and the concrete ability to support it.