| Quality Model | Definition |
| McCall quality model [13] | This quality model has three quality of software product: according to this model “Reusability quality factor” show the quality of product as a form of product transition that means adaptability to new environment with the help of generality and self documentation quality criteria. |
| Dromey quality model [14] | Dromey proposed a framework for evaluate requirement design and implementation phase. The high level software product properties for the implementation include ‘reusability as the quality criteria of Dromey quality mode. |
| Boehm quality model [15] | Boehm quality model used reusability as the quality factor to accomplish the completeness criteria to automatics and qualitative evaluate the quality of software. |
| FURPS model [16] | FURPS model extended by IBM Rational software used “reusability as the quality factor” in FURPS QUALITY MODE to accomplish the consistency and documentation quality criteria. |