This article deals with the Product Quality Measures for testing

• Customer satisfaction index
• Delivered defect quantities
• Responsiveness (turnaround time) to users
• Product volatility
• Defect ratios
• Defect removal efficiency
• Complexity of delivered product
• Test coverage
•  Cost of defects
• Costs of quality activities
• Re-work
• Reliability and Metrics for Evaluating Application System Testing.

     Customer satisfaction index            

• This index is surveyed before product delivery and after product delivery.The following are analyzed:
•  Number of system enhancement requests per year
• Number of maintenance fix requests per year
• User friendliness: call volume to customer service hotline
• User friendliness: training time per new user
• Number of product recalls or fix releases (software vendors)
• Number of production re-runs (in-house information systems groups)

Delivered defect quantities

They are normalized per function point (or per LOC) at product delivery (first 3 months or first year of operation) or Ongoing (per year of operation) by level of severity, by category or cause, e.g.: requirements defect, design defect, code defect, documentation/on-line help defect, defect introduced by fixes, etc.

Responsiveness (turnaround time) to users

• Turnaround time for defect fixes, by level of severity
• Time for minor vs. major enhancements; actual vs. planned elapsed time

Product volatility

Ratio of maintenance fixes (to repair the system & bring it into compliance with specifications), vs. enhancement requests (requests by users to enhance or change functionality)

Defect ratios

• Defects found after product delivery per function point.
• Defects found after product delivery per LOC
•  Pre-delivery defects: annual post-delivery defects
•  Defects per function point of the system modifications

Defect removal efficiency

• Number of post-release defects (found by clients in field operation), categorized by level of severity
• Ratio of defects found internally prior to release (via inspections and testing), as a percentage of all defects
•  All defects include defects found internally plus externally (by customers) in the first year after product delivery

Complexity of delivered product

•  McCabe's cyclomatic complexity counts across the system
•  Halstead’s measure
•  Card's design complexity measures
•  Predicted defects and maintenance costs, based on complexity measures

Test coverage

•  Breadth of functional coverage
•  Percentage of paths, branches or conditions that were actually tested
•  Percentage by criticality level: perceived level of risk of paths
•  The ratio of the number of detected faults to the number of predicted faults.

 Cost of defects

• Business losses per defect that occurs during operation
• Business interruption costs; costs of work-around
•  Lost sales and lost goodwill
•  Litigation costs resulting from defects
•  Annual maintenance cost (per function point)
•  Annual operating cost (per function point)
•   Measurable damage to your boss's career

 Costs of quality activities

•  Costs of reviews, inspections and preventive measures
• Costs of test planning and preparation
• Costs of test execution, defect tracking, version and change control
• Costs of diagnostics, debugging and fixing
• Costs of tools and tool support
• Costs of test case library maintenance
• Costs of testing & QA education associated with the product
•  Costs of monitoring and oversight by the QA organization (if separate from the   development and test organizations) 

  Re-work

•   Re-work effort (hours, as a percentage of the original coding hours)
•   Re-worked LOC (source lines of code, as a percentage of the total delivered        LOC)
•    Re-worked software components (as a percentage of the total delivered             components)

 Reliability

•  Availability (percentage of time a system is available, versus the time the system is needed to be available)
•  Mean time between failure (MTBF).
•  Man time to repair (MTTR)
•  Reliability ratio (MTBF / MTTR)
•  Number of product recalls or fix releases
• Number of production re-runs as a ratio of production runs