Component-based software development is becoming popular in the industry. To help measure the quality of software components, metrics have been proposed. These metrics focus on complexity, customizability, and reusability of components. Complexity metric evaluates how complex components are, customizability measures how easily components can be tailored to specific needs, and reusability assesses how much components can be reused in different applications. These metrics can be used to quantify the characteristics of software components.