Computer Science 1032A/B Chapter Notes - Chapter 8: Olap Cube, Online Transaction Processing, Online Analytical Processing

• School: Western University
• Department: Computer Science
• Course: Computer Science 1032A/B
• Professor: Diane Goldstein

Document Summary

In reality, managers are often not sure just what data they need. >> tendency is to ask as much data they can get resulting in overload. Too many possibilities exist to expect decisions to improve with data. Managers instead suffere more from an overabundance of irrelevant data. Petabyte = 10 to the 12 bytes. Exabyte = 10 to the 18 bytes. The challenge for managers in a world overloaded with info is to find the appropriate data and incorporate them into their decision processes. Is can both help and hinder this process. A final challenge in decision making is the quality of the data. Incosistent data is the third problem, common in data gathered over time. Data can be too fine or coarse. Data granularity refers to the degree of summarization or detail. Clickstream data is e-commerce data that describe a customer"s clicking behavior. Includes everything the customer does at the website.