Development and testing

Development and testing stage,

The development and testing stage is the stage in which the system is created then examined for any faults, if needed several stages need to be repeated until the system doesn't have any faults. to test for faults a test plan is needed which contains:

• test data
• actual results
• expected results
• comments on the difference between the expected and actual results

where test data consists of:

1. normal data: which is accepted by the system
2. extreme data: which would be the data at both ends of a range.
3. abnormal data: which is not accepted by the system.