For groups to collaborate effectively, appropriate communication methods and technology are needed.
The Internet and its derivatives (i.e., intranets and extranets) are the infrastructures on which much communication for collaboration occurs.
The Web supports intra- and interorganizational collaborative decision making through collaboration tools and access to data, information, and knowledge from inside and outside the organization.
Intra-oraginzational networked decision support can be effectively supported by an intranet. People within an organization can work with Internet tools and procedures through enterprise information portals.
An extranet links people in different organizations. For example, several automobile manufacturers have involved their suppliers and dealers in extranets to help them to deal with inventories and customer compliances.