Decomposing into a four-layer architecture
Having a map of the information system is the single most important thing to do when creating an IT service or when working on an existing one. Let’s start with a map of the required information system in a top-down approach that will be better suited to detailing what we want to achieve with this example.
Business process management layer
Some business processes of DemoEditor have already been illustrated in the previous chapter but, before coming back to this level of detail and providing a reference list of the processes we are going to turn into software, it may be interesting to look at the company from an even higher perspective than macro-processes, and this is what value stream mapping (VSM) is about. VSM diagrams integrate processes into a global view of the stream of information and goods of the company, in order to ease reflection on production time and value created by the company, often within a network of suppliers...
