摘要:Previous contributions in the empirical software engineering literature have consistently observed
a quality degradation effect of proprietary code as a consequence of maintenance. This
degradation effect, referred to as entropy effect, has been recognized to be responsible for significant
increases in maintenance effort. In the Open Source context, the quality of code is a fundamental
design principle. As a consequence, the maintenance effort of Open Source applications may not
show a similar increasing trend over time. The goal of this paper is to empirically verify the entropy
effect for a sample of 4,289 community Open Source application versions. Analyses are based on the
comparison with an estimate of effort obtained with a traditional effort estimation model. Findings
indicate that community Open Source applications show a slower growth of maintenance effort over
time, and, therefore, are less subject to the entropy effect.