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London Ambulance Service

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Introduction

The London Ambulance Service is unfortunately known for having a troubled past in terms of reliability of computer-aided dispatch (CAD) systems. In 1992, an updated version of the 1987-1990 system was re-launched but after 9 days it failed, resulting in millions of pounds being wasted as well several lives being lost (source 1). The 1992 failure will forever be remembered as a colossal accounting information systems failure. The second CAD attempt in 1992 was forced to back to a manual system after the system was overflowed with calls and could not reliably dispatch ambulances. The main problem with the software was that it was rushed into use without following the adequate steps of systems development life cycle (source 2). Other important factors that caused such a disaster included weak feasibility and initial investigation, the software never having been adequately tested, the staff using the software not having been properly trained, and the absence of a backup plan in case the system failed. Scope This case review will focus on the failure of the 1992 system, which was expected to be fully automated and reliable, fixing errors made during the 1980s and the shortcomings of previous systems. These failures will be explained and broken down based on the steps used in the systems development life cycle starting with systems analysis, followed by conceptual design, physical design, implementation and conversion, and ending with operation and maintenance, as seen in Figure 1. Information systems projects are extremely complex, which is why there is so much research into why these system often fail. Between 30 to 40% of all software projects are delivered far beyond/much later than the expected date and are grossly over budget while failing to perform what was originally expected (Source 4, p. 308). In the case of the London Ambulance

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