A method (1500) for generating a Generalized Missing Rule (GMR). The method involves receiving descriptions of First Scopes (FSs) that are admissible for a First Rule Project (FRP). FRP comprises first rules. Each FS is defined by at least one object characterizing a case. An Expanded Set of Scope Descriptions (ESSD) is generated by adding descriptions of Second Scopes (SSs) covered by FRP to the descriptions of FSs. An Implicit Description (ID) of FSs and SSs is produced. An Incomplete Most-General Scope (IMGS) is identified from FSs and SSs using ID. IMGS is a scope which is defined by a minimal set of objects, is admissible for FRP and covers at least one case which is not treated by a Second Rule Project (SRP). A Missing Case (MC) of IMGS is identified. MC is not treated by FRP. GMR is generated using MC and IMGS.