Web Based Shop floor system design

There is a proposal to design and develop a Web-based system for managing the shop flor activities-right from Production order to warehousing, stores, production, finished goods handling. It is like a mini ERP with thin-clients. Clients will use browsers to access the application through the intranet. We are planning for going in for Microsoft technology, com, com+, Dcom, .net etc…
Can somebody help us with the architecture, desing policies?