Product Testing

1
Product Testing

• After the last module has been successfully
  integrated into the product
• To ensure that the product as a whole is free of
  faults and will not fail its acceptance test
• The robustness of the product as a whole
• Check that the product meets all constraints
• Stress the product behaves correctly when
  operating under a peak load
• Volume the product can handle large input files
• Review all documentations and verify them against
  the product

2
Acceptance Testing

• Done by the client organization, SQA at the
  presence of client representatives, or by
  independent SQA group hired by the client
• Performed on actual data
• May be done in parallel with existing system
• Correctness
• Performance
• Robustness
• Documentation

3
Why Maintenance Is Necessary?

• Corrective maintenance to correct any residual
  faults in code or any documentation
• Perfective maintenance to improve the
  effectiveness of the product.
• Adaptive maintenance to react to change in the
  environment in which the product operates.

4
Percentage of Time (69 Organizations)
5
What Is Required of Maintenance Programmers

• Many organizations assign the task of maintenance
  to beginners and less competent programmers.
• Determine exactly where the fault lies.
• Fix the fault without inadvertently introducing
  another fault (regression fault) elsewhere in the
  product.
• Perform regression testing.
• Update any related documents.
• It is clear that maintenance programmers have to
  posses almost every technical skill that a
  software professional could have.

6
Management of Maintenance

• User fills out fault reports that include enough
  information to enable the maintenance programmer
  to recreate the problem.
• Provide ways for the user to bypass the portion
  of the product that apparently is responsible for
  the failure.
• Determine cause for the failure, repair the
  system, test the change as well as the product as
  a whole.
• Define procedures of version control.
• Ensure further maintainability.