Final answer:
To ensure proper staffing for a restaurant, the Historical Guest Counts report should be used. It provides essential data to predict staffing needs based on past customer traffic and helps manage labor costs effectively.
Step-by-step explanation:
To ensure your restaurant is properly staffed, you should use a Historical Guest Counts (GC) report. This report provides data on past customer traffic, which is crucial for predicting future staffing needs. Knowing the patterns of guest visits, such as busy hours, days, or seasons, allows you to schedule the right number of staff to efficiently serve your customers without overstaffing, which could lead to unnecessary labor costs.
The Productivity Report might be useful for analyzing the efficiency of staff during their shifts, but it doesn't predict future staffing requirements. The Side by Side P&L (Profit & Loss) can provide insights into the financial performance of different aspects of your restaurant, but it doesn't directly inform staffing decisions. Lastly, a Guest Service Plan outlines how to provide exceptional service to guests, but it doesn't have the specific historical data necessary for staffing forecasts.