Adam,
You can certainly get the job done using just IS and MIS. You might use Broker as part of your asynchronous implementation approach.
Using Modeler would lead you to build your solution using a top-down or process-oriented approach. It also allows non-technical users (and management) to more easily visualize what you are creating. If using Modeler, Monitor will allow you to view the status of any active or completed instance of a business process.
Manager has had some major improvements in usability and performance since its first release and now incorporates some of the functionality of webMethods Optimize. Manager provides system management information similar to Unicenter, but goes much deeper into webMethods product specific details. It also comes preconfigured to autodiscover your WM infrastructure and find common issues before you even tell it to do so. That said, you don’t need it to get the job done.
Fabric could help you build location transparency and seemless failover into the web services that you plan to create. See my articles on that topic either here on WM Users or at the Conneva web site.
HTH,
Mark
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