1. A computer-implemented method of measuring process compliance, comprising: storing, by a computer system, an adopted reference model of a business process; storing, by the computer system, a plurality of process instances of the business process; generating, by the computer system, an as-is model from the plurality of process instances; calculating, by the computer system, a sequence-based compliance measurement between the adopted reference model and the as-is model; and outputting, by the computer system, the sequence-based compliance measurement.