Embodiments of the present invention are directed to a method and apparatus for automatic health monitoring. In a first step of a data store change process a new version data store is created, having a new version data store schema, containing data derived from the data in the existing version data store at an initial point at the start of a data migration phase. A feedback signal is subtracted from the phase signal to form a difference signal. Each of these electronic files of the plurality of electronic files may include an electronic image of at least a portion of a negotiable instrument and include a plurality of data fields.