We are back to 1999. Suppose that you are running a small Post Office branch. You enjoy the business: it provides a stable income, you like the people contact, and your customers value the service you give to the community.
However, all is not well. The Post Office have recently introduced a new computer system called 'Horizon'. The system is designed by Fujitsu. It is supposed to simplify your accounting for daily takings. Yet it is doing the opposite. You are starting to see accounting shortfalls.