Tanuja Ghosh

Tableau to Sigma Report Migration – BI Modernization Project

• Migrated a complete suite of business dashboards (100+ reports) from Tableau to Sigma Computing, aligning with enterprise-wide platform shift.
• Recreated visualizations using Sigma’s cloud-native modeling, integrating Snowflake datasets for real-time performance.
• Collaborated with stakeholders to validate data integrity and train teams on Sigma functionality.
• Achieved a 40% reduction in report latency and improved stakeholder adoption through simplified UI and filter logic.

Project: Sales & Customer Behavior Analysis for a Restaurant Chain
Objective:
Analyzed point-of-sale (POS) data from a multi-location restaurant chain to uncover trends in customer behavior, optimize menu offerings, and improve revenue performance.
Tools & Technologies:
Python, Pandas, SQL, Excel, Tableau (or Power BI), Seaborn, Matplotlib

Accomplishments:

• Created customer segmentation based on frequency, spending patterns, and order types (dine-in vs. takeaway) using k-means clustering.
• Built a dashboard in Tableau to visualize daily/weekly revenue trends, average order value, and item popularity by location.
• Provided actionable insights that led to a 15% increase in average order value through bundled menu promotions and optimized staffing during peak hours.

Customer Sentiment Analysis – Real-time Restaurant Reviews

• Scraped and cleaned review data from different platforms.
• Used ML models for sentiment classification.
• Visualized trends using Power BI and Seaborn, highlighting rating drivers.
• Helped reduce negative feedback by ~20% through service optimization.