Assignment 4 - Modeling Enterprise Data Warehouse.pdf

Business scenario dallas warehouse inc has an oltp to

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Business scenario : Dallas WareHouse Inc. has an OLTP to record its daily operating transactions. When a customer make order(s) with one employee, the orders’ info such as order number, order date, ship date, and customer id and employee id are recorde d. All customers’ information and employees’ information (i.e. customer’s first name, customer’s last name, employee’s first name etc.) are also stored. When each order is created, the products that customers ordered are checked in their current inventory in order to provide accurate order’s ship date estimation. If the product’s quantity on hand is less than the quantity ordered, then additional products are requested to vendors. For each request, product id, vendor id, wholesale price and days to deliver are recorded. All vendors’ information and product’s information (i.e., vendor’s name, product’s description, and product’s retail price etc.) are also stored. The figure above shows the logical schema of Dallas WareHouse’s OLTP. The CEO of Dallas Warehouse Inc. wants to build a data warehouse that consists of three separated data marts: The first data mart will keep track with product inventory by the end of each months. Particularly, he
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