In this paper, we investigate the correlation between design pattern application and software defects. In order to achieve this goal we conducted an empirical study on java open source games. More specifically, we examined several successful open source games, identified the number of defects, the debugging rate and performed design pattern related measurements. The results of the study suggest that the overall number of design pattern instances is not correlated to defect frequency and debugging effectiveness. However, specific design patterns appear to have a significant impact on the number of reported bugs and debugging rate.

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An Open Source Software (OSS) project can be utilized either as is, to serve specific needs on an application level, or on the source code level, as a part of another software system serving as a component, a library, or even an autonomous third party dependency. There are several OSS quality models that provide metrics to measure specific aspects of the project, like its structural quality. Although other dimensions, like community health and activity, software governance principles or license permissiveness, are taken into account, there is no universally accepted OSS assessment model. In this work we are proposing an evaluation approach based on the adaptation of the City Resilience Framework to OSS with the aim of providing a strong theoretical basis for evaluating OSS projects.

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