The world of business and commerce is changing. As technology advances at a rate of knots and the geography of global working becomes less and less relevant, so the need to run an effective business becomes more and more important. Businesses grow at an alarming rate, often overnight. Interest in particular field can explode resulting in massive, instantaneous business expansion or, rather sadly, the reverse can often happen. New technologies, the increase in power and performance of existing technologies and even legislation can result in businesses going broke at an equally alarming rate. Even when business expansion is more measured, this is often through acquisition of other businesses which brings a whole new swathe of problems with it.

It is essential, therefore, that a business can be managed and controlled in way that makes its behaviour as predictable as practically possible and which allows for the flexibility of an uncertain future. To manage and control the change associated with any business, there is a need for enterprise architecture (EA).

EA is one of those areas where everyone seems to have an opinion, yet fewpeople seem to be able to agree as to exactly what is EA and what does it mean to them.

This book is aimed at helping people to develop their own EAs through modelling. This book provides a description of modelling techniques, in terms of the notation and the approach to applying it, along with a solid approach to modelling EAs. This is an approach that is focussed on modelling and, hence, can be used in conjunction with any number of established techniques or processes for EA development and maintenance. This book is not intended to replace these techniques, but to serve as an enabler to actually realise the EA.