1. A method for estimating a quality measure of a composite application, the method comprising: receiving a set of sequence diagrams describing interactions between pairs of components in a composite application, each sequence diagram describing a functional use case of the composite application; receiving a plurality of component quality metrics, wherein each of the plurality of component quality metrics corresponds to a component of the composite application; calculating a quality estimation for each use case of the composite application as a function of at least one of the component quality metrics; calculating a quality measure of the composite application as a function of the quality estimation for each use case; and outputting the quality measure of the composite application.