Meta-metric Evaluation of E-Commerce-related Metrics

User-perceived software quality is subjective, and thus difficult to be measured. Its importance however in user-centric, web-based systems such as e-commerce systems is huge. How can one measure the subjective? Metrics are one of the most powerful weapons in the arsenal for measuring quality. For such a weapon to be put in good use, guidelines for use should be available. In this paper we present a model based on meta-metrics that suggests what metrics should be used in what way and how, when evaluating an e-commerce system.