  Adaptability is a significant property which enables software systems to
continuously provide the required functionality and achieve optimal
performance. The recognised importance of adaptability makes its evaluation an
essential task. However, the various adaptability dimensions and implementation
mechanisms make adaptive strategies difficult to evaluate. In service oriented
computing, several frameworks that extend the WS-BPEL, the de facto standard in
composing distributed business applications, focus on enabling the adaptability
of processes. We aim to evaluate the adaptability of processes specified from
the extended-BPEL frameworks. In this paper, we propose metrics to measure the
adaptability of an AO4BPEL process. The metrics is grounded in the perspective
that a process is capable of dynamically adapting to changes in business
requirements. This opens potential future work on evaluating the adaptability
of processes specified from various aspect-oriented WS-BPEL frameworks.
