N J Taylor

A337 Accounting Information Systems

Topics

• Business Intelligence

• Data Quality

• XBRL

Enterprise Systems

“Enterprise” Systems

Enterprise Resource Planning (ERP) Systems – Operational data in a single database

Data Warehouse– Decision data in a single “extracted”

database– Can be a subset of the data (data

mart)

Business Intelligence

Extract, Transform, Load (ETL)

From Computerworld QuickStudy

Data Quality

Data Quality: What is Dirty Data?Potential Problems?• Inventory Reorder• Profit per unit Net profit• Customer Satisfaction

– Less Repeat Business– Angry Bloggers

Solution: Same code for vendor and retailer

No translation necessary (like MAC address)Data Integrity: Wal-Mart's Dirty Secret

Web Scraping and Data Quality

• Poor data quality can lead to poor decisions (GIGO)

• Cleanup can be costly because it often involves human effort

• Demo (Madonna of Foligno (Raphael)

Web Scraping and Data Quality

• XML<painting>

<img src="madonna.jpg" alt='Foligno Madonna, by Raphael'/> <caption>This is Raphael's "Foligno" Madonna, painted in <date>1511</date>–<date>1512</date>. </caption>

</painting>

• Web Services– Allows computer-to-computer communication.– Data representation can be a challenge - e.g. Historical

stock price for Sun Microsystems (SUN, JAVA, ORCL)