Meaning of Quality: Defining Quality

"Achieving high levels of user satisfaction, portability, maintainability, robustness and fitness for use" "Software Quality means being on time, within budget and meeting user needs" "High levels of user satisfaction and low defect levels, often associated with low complexity" "high levels of user satisfaction and adherence to requirements" 

Quality must meet two important criteria:  

1. Quality must be measurable when it occurs  

2. Quality should be predictable when it occurs