1. ©G. Millbery 2003Data, Information, Knowledge and Processing Slide 1 Testing  Every system must be reliable and the data it produces trusted  This is done through testing  Testing gives the users and management confidence that the system works

2. ©G. Millbery 2003Data, Information, Knowledge and Processing Slide 2 Purpose of Test Data  Normal To test the system works under normal conditions with normal data  Extreme This tests with accurate data but at the lower and upper extremes of the range of data required  Boundary values Data that is on the edge of a change. For example a date of birth that is just out of range for membership of a video club.  Erroneous This tests with incorrect data

3. ©G. Millbery 2003Data, Information, Knowledge and Processing Slide 3 Importance of Testing  To test the system under all conditions  To emulate users and their actions and ensure the system continues to work  To cover all potential actions and entries into the system  To give users confidence in the system  To allow the system to be signed off and payment received

4. ©G. Millbery 2003Data, Information, Knowledge and Processing Slide 4 Importance of Test Plans  To ensure all avenues are covered and none forgotten  To document the data used  To list the actions taken  To list the start point of any testing  To enable all tests to be reproduced  To list expected results  To be able to tie expected results to actual results