A family expects 20 people. The organiser sets targets for 20 main-dish servings, 10 bottles of drinks, 24 cups, and 20 dessert portions.
Four targets replace a vague request
Each category uses one unit and a short note. Participants can understand the gap without asking the organiser.
Every promise includes an item and quantity
Maya adds 8 vegetable-pie servings; Daniel adds 12 chicken servings. Together they cover the main-dish target.
Only one small gap remains
A day before the picnic, food and cups are covered while drinks show two bottles remaining. The organiser buys only that gap.