Fine grained Process Modelling: An Experiment at British Airways

We report on the experimental application of process technology at British Airways (BA). We used SLANG to model BA's C++ class library management process, and we constructed an experimental process-centred software engineering environment (PSEE) based on SPADE. BA required processes to be automated at a ner degree of granularity than tool invocation. We have demonstrated that SLANG and SPADE o er the basic mechanisms for modelling these ne-grained processes. We have also shown that it is feasible to generate tools for dedicated processes and integrate them with a SLANG model so as to facilitate ne-grained process automation. However, our experience highlighted some open problems. For instance, SLANG process models are tuned to e cient enactment, thus containing very detailed process fragments. These are not the most appropriate representation for humans trying to understand the process model. A more comprehensible notation is needed for design and documentation purposes. Although the airline did not deploy the PSEE in its production environment, the experiment proved bene cial for BA. The modelling uncovered serious aws in the existing process, and the BA engineers improved their knowledge of process technology. This work has been partly funded by the CEC within ESPRIT-III project 6115 (GOODSTEP). The work was done while W. Emmerich was with University of Dortmund (Germany), S. Bandinelli was with CEFRIEL (Italy) and J. Arlow was with British Airways (UK).