Why Data Warehousing? Advance of information technology Data collected in huge amounts Need to make good use of data? Architecture and tools to Bring together scattered information from multiple sources to provide consistent data source for decision support. Support information processing by providing a solid platform of consolidated, historical data for analysis12 Why Data Warehousing? • Advance of information technology. • Data collected in huge amounts. • Need to make good use of data? • Architecture and tools to – Bring together scattered information from multiple sources to provide consistent data source for decision support. – Support information processing by providing a solid platform of consolidated, historical data for analysis