Xerox 6180N Generic MICR Fundamentals Guide  - Page 117

Problem solving Application software Any application change should be reason for a thorough inspection. Although new applications must be thoroughly tested before MICR documents are issued, subtle application changes can have an impact on MICR document performance. Some problems, such as a new authorized signature that extends into the MICR clear band, are easy to detect. Others, such as a MICR font change, may require sophisticated tools to identify. If the change coincides with a reject rate problem, you should revert to the prior version for testing. Unknown cause When the cause of a rejection rate problem cannot be determined, or the initial corrective actions prove ineffective, a dual approach is indicated. Additional attention to printing and processing details may uncover the cause. In addition, institute an active reader sorter testing program to replicate the problem under controlled conditions. You should also closely examine the four areas of investigation discussed earlier in this chapter. Reader sorter testing Reader sorter qualification testing must occur under a controlled set of circumstances for accurate results. The results from a single reader sorter test can vary significantly, depending on: • Printing conditions • Reader sorter model • Adjustment of the reader sorter • Statistical design of the test A valid qualification test should meet these conditions: • The reader sorter is adjusted to manufacturer specifications and is cleaned regularly by the operator according to the manufacturer's recommendation. • Process a large group of documents, several thousand at a time. • Acquire reject performance data for the particular reader sorter that is used for the test. • Fan documents before placing them in the reader sorter for each pass. Generic MICR Fundamentals Guide 7-5