Implementing a QMS is a first step to establish standardized procedures for running several processes in an organization. For each process establish relevant performance indicators and monitor and evaluate performance regularly. I recommend using quality tools like control charts, Pareto diagrams and histograms to get the most information out of the data. When your organization decides to invest in improving performance it can use quality improvement tools and methods during the PDCA cycle.
The following material will provide you information about QMS improvement: