1. A computer-implemented method of managing business scenarios defining derived events, based on a complex event processing (CEP) tool, a CEP configuration program, and a CEP runtime engine, the computer-implemented method comprising, by the CEP configuration program: outputting an indication of a plurality of business scenario templates available for selection, wherein the plurality of business scenario templates is generated by the CEP tool; receiving a selection of a business scenario template from the plurality of available business scenario templates, the business scenario template having at least one configurable parameter which, when configured, permits a corresponding business scenario to be generated from the business scenario template, the business scenario defining what constitutes an occurrence of an event derived from a plurality of lower-level events; receiving input specifying an initial value for the at least one configurable parameter of the selected business scenario template; generating the business scenario based on the initial value and the selected business scenario template and by the CEP configuration program when executed by one or more computer processors; reconfiguring the business scenario by the CEP configuration program and based on a subsequent value specified for the at least one configurable parameter, the subsequent value being different from the initial value; and activating the reconfigured business scenario by the CEP configuration program, whereupon the activated business scenario is monitored by the CEP runtime engine, which is configured to, upon detecting the occurrence of the derived event defined by the business scenario, execute an action defined by the business scenario, wherein an indication of the executed action is output.