The lack of unified approaches to creating various complex organizational and technical systems and the accompanying processes gives rise to a problem associated with general rules for assessing and ensuring the interoperability of such systems. Complex systems are characterized by multiple states. Each state is defined by a particular set of parameters. Changing the values of parameters that characterize a separate element of the system can lead to changes in the output parameters of the system as a whole and its state. The latter, along with the presence of complex functional dependencies, significantly complicates formalization when describing the functioning of such systems. Attempts to organize the joint functioning of systems that have not reached a certain level of quality according to a set of critical characteristics often have the opposite effect. The research results are intended to provide a basis for assessing process quality performance. The assessment results can be used to improve process performance, benchmarking, or identify risks associated with the application of processes.