Changing a business process model involves several aspects: (1) given a set of change operations, dependencies and conflicts are encoded in dependency and conflict matrices; (2) given a change sequence for a process model M, the change sequence is broken up into subsequences such that operations from different subsequences are independent; (3) given a change sequence for a process model V1 and another change sequence for a process model V2, conflicts between operations in the different change sequences are determined; (4) the process structure tree can be used to localize dependency computations, yielding a more efficient approach to determining dependencies; and (5) the process structure tree can be used to localize conflict computations, yielding a more efficient approach to determining conflicts.