TJ, while there are always potential problems on the maintenance end where there can be a substitution, I don't believe that this is the manufacturer's fault. Back when we had fuses at home (sometime in the third quarter of the last century of the last millenium) we made sure we had a full set of the correct fuses on hand. We also made sure we put the correct fuse in as a replacement. Now, my father worked in an place where precision was paramount, so it was in his nature that we did so.
Now, the situation you describe is probably all too common these days. I think it becomes a management issue to ensure that you are properly equipped with spares.
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For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.