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The British Standards Institute published 'A Code of Practice for IT Service Management (PD0005) which was based on the principles of the ITIL; the context diagram from the guide is reproduced below. The diagram is not a process model but simply a pictorial description. It can be viewed in the same way as Figure 1.1, i.e. the main principles (of Service Management in this instance) are placed in a coherent context, providing guidance that enables the reader to make links between related process elements.
Figure 1.3 - PD0005 Service Management processes
If we now consider PD0005 in the context of Figure 1.3, it is obvious that the new IT Infrastructure Library models can be seen as an expansion of the BSI model, taking IT Service Management forward. The process elements are nearly the same, the principle of Change and Configuration Management as a linchpin is the same, the difference relates to the level of detail. Both BSI and CCTA espouse similar, if not identical, principles of best practice for IT Service Management.
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