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In the software engineering area, has been observed a growing concern to perform experimental studies to evaluate the use of new technologies. However, conducting experimental research is a complex and challenging activity, once it suffers impacts related to human factors. The use of a well defined process for experimental study contributes to the control of the variables involved and their realization. It allows generalization of the results and also replication of the studies. This paper presents an experimental study to evaluate and improve an integrated approach to development and software testing. Such approach was proposed to be adopted when distributed development scenarios are considered.