Requirements for Efficient Troubleshooting

Important prerequisites to an efficient problem-solving process are  

The extrusion process is largeiy a biack box process. In other words, it is not pos-sibie to visuaiiy observe what goes on inside the extruder. We can see materiai going into the extruder and materiai coming out of the extrusion die. However, what happens between the feed opening and the die exit cannot be seen on normai extruders, because the process is obscured by the extruder barrel. That means that we are largely dependent on instrumentation to determine what happens inside the extruder. We can think of instrumentation as our window to the process.  

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