Final answer:
A bartender using a jigger to measure and mix ingredients manually in a glass with ice represents a traditional and precise cocktail-making approach, ensuring consistent flavor balance.
Step-by-step explanation:
The drink production system being described by the student involves a bartender manually measuring and mixing ingredients to create a cocktail. This method of making drinks is considered to be a traditional and hands-on approach. The bartender uses a jigger to accurately measure the spirits before pouring them into a glass filled with ice, and then adds the desired mix to complete the beverage. This method allows for consistency and precision in cocktail-making, ensuring that each drink has the intended balance of flavors.