1. A method comprising: performing a plurality of operations on a web at a plurality of manufacturing process lines; imaging a sequential portion of the web to provide digital information at each of the manufacturing process lines; processing the digital information to produce local anomaly information for each of the manufacturing process lines, wherein the local anomaly information for each of the manufacturing process lines includes position data for a set of regions on the web containing anomalies; registering the position data of the local anomaly information for the plurality of manufacturing process lines to produce aggregate anomaly information; analyzing at least a portion of the aggregate anomaly information to determine which of the anomalies represent actual defects in the web; and outputting a conversion control plan.