Precise, on-going data synchronization is a non-negotiable requirement for Scan-Based-Trading. Few retailers have the economies of scale to keep-up with the kind of non-stop item file and pricebook maintenance that is essential to pursuing SBT. Achieving optimal scan accuracy is not a destination to reach - it is an on-going process to follow. Going to SBT without the means to develop and maintain pristine data is a penny wise, and a dollar foolish.