The minimum principle, also known as the optimal principle, attempts to achieve the given goal with a minimum use of resources.

Example of the minimum principle:
Two rental cars are available. According to the manufacturer, one rental car needs 40 liters for the planned trip, the second rental car needs 35 liters of gasoline for the planned trip.

If the customer who wants to rent the car for his trip acts according to the economic principle, he will choose the car with the lower fuel consumption.