I began my career in the plastics industry more than 20 years ago as a simulation engineer performing flow analysis. In those days, we used a now-defunct software that could only do filling and packing analysis. We had our own code for cooling analysis, and predicting warpage - the Holy Grail of injection molding simulation - was still in its infancy. So our recommendations to improve warpage were based solely on what we had learned from filling, packing and cooling analysis. The problem was that we ran out of simulation options when all these analyses were exhausted and the part was still warping too much. Even with today's more accurate warpage analysis tools, there are still many cases in which you seemingly do everything right in terms of material selection, mold design and processing, and still get badly warped parts. There must be some other solution.
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