An extrusion line is composed of many components linked together. When you purchase a less than reliable piece of equipment, the likelihood of line failure grows and the level of acceptability drops.
A single machine can bring down the success probability of a whole system, not to mention the degree of satisfaction. So the goal is to seek out equipment offering the best chances towards success.
A measure of how successful a system operates is to consider the probability of how well each part will function over a certain period. Try out this exercise. Read more >>