A method, apparatus and system for updating a causal loop diagram of quality meters for an information system, including retrieving the causal loop diagram of the quality meters for the information system, the diagram comprising at least a first quality meter, and a second quality meter and an interaction between them with its strength. The invention further includes receiving online measurement data for the first quality meter; receiving online measurement data for the second quality meter; processing the received online measurement data by statistical analysis to determine a measured interaction with its strength between the first quality meter and the second quality meter; comparing the measured interaction with its strength to the retrieved interaction with its strength; and updating the retrieved interaction in the causal loop diagram of quality meters for an information system, if the measured interaction with its strength is different to the retrieved interaction with its strength.
