An Approach to Legacy System Analysis

Understanding tabulating system principles can be very powerful in analyzing legacy systems, even though card readers have not been used extensively for perhaps 40 years or more. In this post I’ll describe an approach I would take to replace a large bank’s customer deposit system. You can watch the video here. Daily Financial Cycle First, let’s be clear about what the daily financial cycle looks … Continue reading An Approach to Legacy System Analysis

Tabulating System Metadata

In the final episode about how many of our financial systems are based upon tabulating system principles, we’ll discuss how to detect more specific information about those specific programs. Finding the posting programs within tabulating systems is an important pillar of understanding; many other processes hang off the posting program.  Edit process precede posting, reporting typically follows. In looking for the posting programs, there is … Continue reading Tabulating System Metadata

Data Discovery in Tabulating Systems

Yesterday I came upon an article about some guys saving an IBM 360 Model 20 mainframe from the 1960’s.  It seems appropriate to think about the system architecture which would have worked on that machine at the time, and it’s origins.  The system would be been based upon tabulating systems. If today’s financial systems, and the tabulating System principles upon which they are based, were … Continue reading Data Discovery in Tabulating Systems

Consider the Punch Card

Today’s banking and financial systems were by and large automated in the 1970s and early 1980; the process began in the late 1950 and through the 1960s.  I find it helpful to reduce the problem of what the systems do down to the most basic elements in considering the financial patterns involved. And what might be the most basic element?  In many respects, to state … Continue reading Consider the Punch Card