Automate Restaurant Sales & Inventory Forecasting with Gemini AI & Google Sheets

This AI-powered restaurant forecasting workflow uses Google Gemini and Google Sheets to automate weekly predictions for both sales and inventory requirements.

By analyzing historical order and material usage data, the system generates accurate demand forecasts and emails weekly summaries to management.

This ensures smarter purchasing decisions, optimized stock levels and minimal food wastage - without any manual intervention.

AI-Driven Forecasting

Uses Gemini AI to analyze historical sales and consumption patterns, predicting next week’s demand with high accuracy.

Automated Workflow

Runs weekly on schedule - pulling data, forecasting trends and emailing reports automatically.

Smart Inventory Planning

Helps reduce overstocking or shortages by forecasting raw material needs in advance.

Centralized Data in Google Sheets

Stores both historical and forecasted data in organized sheets for future reference and analytics.

Email Notifications

Automatically sends forecast summaries to restaurant managers and procurement teams for quick decision-making.

1. Trigger Weekly Forecast

The workflow runs automatically at a scheduled time (e.g., every Monday 8 AM) to start the forecasting process.

2. Load Historical Sales Data

Pulls the past week’s sales and ingredient usage records from Google Sheets.

3. Format Input for AI Agent

Transforms raw sales data into a structured JSON format suitable for AI analysis.

4. Generate Forecast with AI (Gemini Model)

Gemini AI analyzes trends and patterns to predict the next week’s expected sales and material requirements.

5. Interpret AI Forecast Output

Parses the AI-generated text response into clean, readable data (JSON or tabular format).

6. Log Forecast to Google Sheets

Stores the final AI predictions (sales and stock needs) in a new Google Sheet for historical tracking and decision support.

7. Email Forecast Summary

Automatically sends a summary of the forecast results via Gmail to key stakeholders, including management, kitchen staff and procurement.

• Google Sheets: Stores historical and forecasted data for easy access.
• Gemini AI (Chat Model): Generates accurate weekly forecasts using sales trends.
• n8n: Automates the data flow, AI processing, and notification system.
• Gmail API: Sends forecast reports automatically to management.
• AI Think Tool: Enhances Gemini’s forecasting logic with contextual reasoning.

1. Scheduled Trigger: The automation runs weekly.

2. Data Fetch: Pulls the last week’s sales and material usage.

3. Data Prep: Cleans and formats input for Gemini AI.

4. Forecast Generation: Gemini predicts next week’s sales and ingredient needs.

5. Interpretation: Converts the raw AI response into structured, actionable insights.

6. Storage: Forecast results are logged into Google Sheets for future comparison.

7. Report Delivery: The summary is emailed automatically to relevant teams.

Scenario: A restaurant wants to plan next week’s ingredient purchase based on past order patterns.

Automation Flow:

1. Every Monday, the workflow starts automatically.

2. Historical sales and usage data are fetched from Google Sheets.

3. Gemini AI predicts next week’s expected demand.

4. The forecast is stored in the sheet and summarized.

5. The manager receives an email: “This week’s forecast predicts a 12% rise in dessert sales and a 5% increase in chicken usage. Adjust procurement accordingly.”

• Accurate AI Forecasting: Data-driven insights powered by Gemini AI.

• Completely Hands-Free: Scheduled automation with no manual effort.

• Improved Inventory Management: Smarter purchasing decisions and waste reduction.

• Real-Time Insights: Weekly AI reports delivered directly to your inbox.

• Easy Tracking: All forecast data logged for trend analysis and performance review.

This Restaurant Forecast Automation Workflow combines Gemini AI, Google Sheets and n8n to predict upcoming demand automatically.

It helps restaurant owners and managers plan inventory efficiently, reduce waste and make informed decisions with zero manual tracking. Visit Official workflow   

Ready to automate your restaurant forecasting?    Contact Oneclick's AI Automation Team to schedule a free consultation.