1. Information systems ‘failure’: the case of the London Ambulance Service's Computer Aided Despatch project
2. CCTA (Central Computer and Telecommunications Agency) (1989), Information Systems Guide B4: Appraising Investment in Information Systems.
3. Information Management Group (undated), Business Case: Model Outline. Substantial IM&T Investments: Getting them Approved and Managing their Implementation, NHS Management Executive, London.
4. Information Management Group (1993), Investment Appraisal Guidelines, NHS Management Executive, April.
5. Addressing Organizational Issues into the Evaluation of Medical Systems