---
date: 2021-04-05
id: 7626ffe4-470f-4772-858b-424ae080fa17
title: Important quality attributes and their definitions
---

# Summary

| Quality Attribute | Definition |
|----|----|
| Understandibility | The ease with which the design fragment can be comprehended |
| Changeability | The ease with which a design fragment can be modified (without causing ripple effects) when an existing functionality is changed. |
| Extensibility | The ease with which a design fragment can be enhanced or extenended (without riple effects) for supporting new functionality. |
| Reusability | The ease with which a design fragment can be used in a problem context other than the one for which the design fragment was originally developed |
| Testabillity | The ease with which a design fragment supports the detection of defects within it via testing. |
| Reliability | The ease with which the design fragment supports the correct realization of the functionality and helps guard against the introduction of runtime problems. |