Abstract
Zurich Insurance used to specify their calculation rules in form-based prose and pseudo-code, which was subsequently implemented by an external party. The resulting long turnaround time seriously affected Zurich’s time-to-market. Zurich and itemis replaced these specifications with the FuMo DSL. Its productive usage has been ongoing for more than 2 years now.
Due to MPS’ projectional editor, the DSL closely resembles both the previous forms and the well-known pseudo-code. The language’s generator removed the external party from the development round-trip. Consequently, the turnaround time went down by several orders of magnitude.
This project imported existing calculation rules from their C implementation and lifted them to FuMo DSL. We hid the complexity of C while lifting, so the end-users can focus on domain aspects. MPS’ language integration enabled a clean design of the FuMo DSL, while edge cases could be handled with special concepts or in embedded C blocks.
We split the import process into small steps that could be validated independently. We assured all steps could be executed by the development team. By annotating the execution with trace logging and comparing the trace logs of the original source code with the generated one, we could handle large batches of similar import issues efficiently.
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Stotz, N., Birken, K. (2021). Migrating Insurance Calculation Rule Descriptions from Word to MPS. In: Bucchiarone, A., Cicchetti, A., Ciccozzi, F., Pierantonio, A. (eds) Domain-Specific Languages in Practice. Springer, Cham. https://doi.org/10.1007/978-3-030-73758-0_6
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