In an example method of configuring an adaptive module for an offline charging system, a selection is received which selects one of a plurality of charging functions. In an example, the selection is received in response to a user prompt. In another example, the plurality of charging functions includes a charging data function (CDF), a charging gateway function (CGF), an integrated CDF/CGF without Ga interface support and an integrated CDF/CGF with Ga interface support. An adaptive module is configured to conform with the selected charging function. The adaptive module has the capacity to conform to any one of the plurality of charging functions. For example, the adaptive module includes a number of program modules and the configuring step selects which of the program modules are enabled and an order in which the enabled program modules are to be executed. The configured adaptive module is executed at a physical entity (e.g., a CDF, a CGF, etc.) within the offline charging system.