Software metrics: Metrics are necessary to provide measurements of such qualities. Metrics can also be used to gauge the size and complexity of software and hence are employed in project management and cost estimation.

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A Metric is a quantitative measure of the degree to which a system, system component, or process possesses a given attribute. Metrics can be defined as ―STANDARDS OF MEASUREMENT‖. Software Metrics are used to measure the quality of the project. Simply, Metric is a unit used for describing an attribute. Metric is a scale for measurement.

Types of software metrics are:

1. Project metrics
2. Progress metrics
3. Productivity metrics