14. How can I prioritize certain time slots?

Sometimes, customer experience takes priority over reducing kilometers or CO₂ emissions. For example, premium customers may require deliveries at specific times to ensure satisfaction—even if this results in longer routes.

To enforce these priority time slots in TourSolver, use the Fixed Slot constraint. This locks the specified time slot for the customer, ensuring they receive their delivery at the desired time. Note: Using Fixed Slot reduces flexibility for the optimization algorithm, as it limits route permutations. However, it guarantees that premium customers are served at the right time.