The article is dedicated to the problem of control of the synergetic openness of the organizational and technical systems in a market economy. The degree of the synergetic openness of a system is an order parameter, which is defined as the system's ability to respond to the external stimuli (consumer demand) by self-organization. It is believed that the system's competitiveness depends on this parameter, but the functional dependency is not defined. The authors propose an incremental algorithm for a synergetic openness for the system control and other parameters of the order and rate of growth of openness. They present an example of application of the algorithm for the control of openness in the planning system of a large industrial enterprise. The task is to ensure control of the degree of openness of the hierarchical planning systems, since the control parameters are the periods of rescheduling at each hierarchical level of the decision-making. It was demonstrated that a higher transparency of the system's structural parameters required consistency at various planning levels. This ensured emergence of a new equilibrium state in the production system, which would meet the strategic objectives of an enterprise.