The real power of F# in industry stems from its ability to solve problems that could not be solved before. In this lecture I shall walk through the design and implementation of a bespoke business rules engine that went into production earlier this year at one of the world's largest insurance companies. Rather than making incremental improvements by rewriting legacy solutions, we overhauled their entire delivery process. Software updates that used to take at least 9 months, cost over £1m and involve dozens of people can now be done in minutes by a single non-technical person at minimal cost to the company. F# was the tool that made this possible.

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