Thankfully, yes. This was in an industry that had evolved from a market, where customers kinda expected occasional problems. It was like 1970s cars. Or, maybe like racing cars, where the customer accepts a risk of failure in order to receive the highest possible performance.<p>The business was interested in modernizing, and gradually weaned itself away from practices such as I described. We had to find a way to make it happen, that would also make the higher-ups happy about the effect on the bottom line. I don&#x27;t want to name names, but today, it is a much different place.<p>To get over this issue requires something analogous to unit testing in software: You have to understand how the correct functioning of the full system builds on the properties of the units.