7. Related Work
The current body of empirical knowledge on AO explain how the use of aspect
decompositions supports the separation of classical crosscutting concerns such as
distribution, persistence, concurrency , and design by contract
. However, such works do not analyze other e®ects and stringent
quality indicators in the resulting AO systems. In addition, they do not quantify the
positive and negative e®ects of AO techniques in the presence of widely-scoped
changes.