Product management supports product development, the sales and management of products, offers and bundles to businesses and mass-market customers. Product Management regularly includes offering cross-product discounts, appropriate pricing and customer loyalty programmes.
Service Providers require a single view of the customer and regularly need to support complex hierarchies across customer-facing applications (Customer relationship management). Customer Management also covers requirements for partner management and 24x7 Web-based customer self-service. Customer Management can also be thought of a full-fledge Customer Relationship Management systems implemented to help customer care agents handle the customers in a better and informed manner.
Revenue Management is a BSS focus on billing, charging and settlement, that can handle any combination of OSS services, products and offers. BSS Revenue Management supports OSS order provisioning and often partner settlement.
Order Management as a beginning of assurance is normally associated with Operational Support Systems though Business Support Systems are often the business driver for Fulfillment Management and order provisioning.