What are six software defect origins?

These are the defect origins

• Requirements
  
• Design
• Source code
• User manuals/training material
• “Bad fixes” or mistakes made during repairs
• Flawed test cases used by the application

• Requirements

There may ambiguous or unclear or unrelated requirements later which produce defects in the saoftware

• Design

If the design is not proper then it may arise the software defects

• Source code

The source code may not be proper or buggy against requirements

• User manuals/Training material

If the user manual or training materials are not according to business then defect can come in the software

• “Bad fixes” or mistakes made during repairs

If bugs reported are not fixed properly or when when repairing does not care for the ripple effects or dependency

• Flawed test cases used by the application

When test cases written for testing were not proper as per requirement of the software.