On top of the education series I created (here) you can download a very useful redbook (here) which explains the different concepts and features of the PureApplication System deployment engine which is in fact an IWD software appliance. As SmartCloud Application Workload Services is also based on IWD most of the information provided by this redbook are valid for SmartCloud Application Workload Services.
This redbook is about PureApplication System 1.1.