ICH is the Inventory Collaboration Hub. This solution module falls within the mySAP Supply Chain Management solution offering from SAP. ICH is a Web-based solution that's designed to ease the collaboration with your business partners. The solution provides enhanced visibility and collaboration of your inventory information to partners across the supply chain. The two core processes within the ICH solution are "supplier-managed inventory" (SMI) and "Vendor-managed inventory" (VMI).
Here is an article on Inventory Collaboration Hub (ICH): http://www.sap.com/solutions/business-suite/scm/pdf/BW_SID_Supply_Network_Collaboration.pdf
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