What is a data warehouse and how does it support decision-making in AIS?

What is a data warehouse and how does it support decision-making in AIS?

• A. A data warehouse stores only operational data and is used for transaction processing.
• B. A data warehouse consolidates integrated data for analysis and reporting to support BI and decisions.
• C. A data warehouse replaces the ERP system.
• D. A data warehouse is a type of firewall.

Answer: (B)

Data warehouses are centralized stores of data from multiple sources that are organized and prepared specifically for analysis and reporting. In AIS, this means pulling data from operational systems such as the ERP, subledgers, and sometimes external sources, then cleaning, integrating, and storing it so users see consistent definitions and a complete historical view. Because the data is stored with a focus on subject areas and time, analysts can perform trend analyses, budgeting, variance analysis, and flexible ad hoc queries to support informed decisions. This setup enables BI tools, dashboards, data mining, and other analytics, letting decision-makers explore information without impacting day-to-day transaction processing in the operational systems. The data warehouse does not replace the ERP; it complements it by providing a separate environment optimized for analysis and decision support. It also isn’t a firewall.

Data warehouses are centralized stores of data from multiple sources that are organized and prepared specifically for analysis and reporting. In AIS, this means pulling data from operational systems such as the ERP, subledgers, and sometimes external sources, then cleaning, integrating, and storing it so users see consistent definitions and a complete historical view. Because the data is stored with a focus on subject areas and time, analysts can perform trend analyses, budgeting, variance analysis, and flexible ad hoc queries to support informed decisions. This setup enables BI tools, dashboards, data mining, and other analytics, letting decision-makers explore information without impacting day-to-day transaction processing in the operational systems. The data warehouse does not replace the ERP; it complements it by providing a separate environment optimized for analysis and decision support. It also isn’t a firewall.