A Model for Prediction of Understandability and Modifiability of Object-Oriented Software

Software quality measurement at an early stage helps in improving the product and process of the development. A good-quality software product is easy to maintain. Maintainability of software refers to the ease with which software can be understood, repaired, and improved. The longevity of software depends on the ability of developers to meet new customer requirements and address the problems faced by them. Software maintenance is the most expensive phase of development and consumes more than half of the development budget. This work is carried out to find the early factors of object-oriented software (OOS) that help developers to refine the quality. The proposed model predicts two major attributes of maintainability, namely understandability and modifiability, ofOOSthroughUMLclass diagrams on the basis of size and structural complexity metrics. The model is validated by establishing a high correlationwith the existing predictionmodel for both the factors. In comparison with an existing model, the proposed model gives a correlation of 0.9603 and 0.9424 for understandability and modifiability, respectively.