Systems and methods allow sharing and reuse of acquired customization knowledge of enterprise systems, utilizing collective customization experience. Particular embodiments employ Case-Based Reasoning (CBR) principles to manage customization experience in the context of both Software as a Service (SaaS) and Platform as a Service (PaaS) environments. Collective customization knowledge may be explicitly retrieved, adapted, shared, reused, and/or traded between tenants, partners, and optionally provider(s), of on-demand enterprise systems. A previous customization case stored within an experience base, may include one or more of the following: information allowing annotation of price information for trading the previous customization case (e.g. to another tenant); information restricting visibility of the previous customization case within the experience base; information defining a rating for the previous customization case within a community; information capturing a reuse frequency of the previous customization case; and/or information rendering anonymous at least a portion of the previous customization case.