Which of the following factors is NOT considered a performance indicator?

User satisfaction is often regarded as a qualitative measure rather than a direct performance indicator. Performance indicators, in the context of computer systems and software, are typically quantitative metrics that can be measured directly and provide insight into how effectively a system is operating.

Response time, for example, is a straightforward performance indicator that reflects how quickly a system responds to requests. Throughput measures the amount of work a system can handle over a given period, providing another direct metric of performance. Scalability indicates how well a system can handle increased load or expand its capabilities, which is also a measureable aspect of performance.

In contrast, user satisfaction is a subjective measure that encompasses users' perceptions and feelings about their experience with the system. While it is important for evaluating overall service quality, it does not lend itself to direct measurement in the same way that the other factors do. Thus, it does not fit the typical definitions of performance indicators used in computer programming and system performance analysis.