1. A method comprising: providing a non-transitory computer-readable storage medium containing an experience base comprising a stored customization case previously used by a first entity to customize an enterprise system for a first tenant, wherein the stored customization case is in a case representation model that includes a customization problem and a customization solution comprising an adaptation pattern category, the stored customization case further including, information configured to restrict inter-tenant visibility of the stored customization case within the experience base distinct from any anonymization measure, and receiving from a second entity, a first query comprising a first unsolved enterprise customization case for a second tenant, the first unsolved enterprise customization case having a first new customization problem and not having a customization solution; causing a case-based reasoning engine contained within the non-transitory computer-readable storage medium to reference the experience base by executing a case retrieval algorithm upon the case representation model and generate a similarity measure between the first new customization problem and the stored customization case; displaying the similarity measure to the second entity prior to adapting the customization solution for the first unsolved customization case; receiving from the first entity, a second query comprising a second unsolved enterprise customization case for a third tenant; and restricting visibility of the stored customization case to the third tenant based upon the information.
2. The method of claim 1 wherein the case-based reasoning engine comprises an add-on to a Platform-as-a-Service (PaaS) component of the enterprise system.