2. Business Background AT&T Inc. is an American multinational telecommunications corporation, headquartered at Whitacre Tower in downtown Dallas, Texas. AT&T is the second largest provider of mobile telephone in the united states. It is spread across various wireless communication sectors which includes voice, data, internet and networking.

3. Business Needs What type of customers to target based on demographic segmentation What bundled/mobile plans sell the most in each region? We would know what types of bundles to provide in each region. Quarterly and Yearly Sales and Usage reports based on various demographic factors. Region wise sales data to implement new stores. To study usage patterns of customers and formulate plans. To find new clients. Assess Product Demand. Revenue/Accounting Reports. Formulate Future Plans based on customer feedback.

4. Role Of Data Warehouse Used for reporting and data analysis. Maintains Historical Data Snapshots. Integrates data from multiple sources. Provide a single common data model for all data of interest regardless of the data's source. Extract, Transform and Load

5. Business Dimensions TIMECUSTOMERS PRODUCTS  Day  Month  Quarter  Year Age City State Name Type

6. Fact Table When? Who? What? When: Time Who: Customer What: Product

7. Fact Tables Sales Usage Revenue

8. Sales Reports by month, quarter, or year.Revenue Reports by month,quarter or year.Usage Reports based on age, sex and profession.Sales Reports by productsRevenue Reports by city and state.