Digital business happens in networks. In networks, customers have an active role, because business processes require customer interaction. Finally the quality of a network – in an economic sense – is identical to the subjective quality of the interaction, as experienced by customers. Metrinomics enriches existing digital business networks with our Subjective Quality Measurement to support real time interaction. We identify sensitive points along the digital customer journey, install sensors, connect with alarms, triggers and action management to ensure a constant adjustment of network performance. Our solutions are self-adaptive and can work as an add-on to existing IT structures.