Are there various plastic manufacturing methods?

When it comes to producing end-use parts and products, one material stands out the most:
Plastic. There are thousands of polymer options, each with specific mechanical properties.
They make almost everything and there is a variety of plastic manufacturing processes that
convert plastics into products. But manufacturing options can be very limited and should be
treated case by case. For example geometry and design require significant design for
manufacturing (DFM) optimization.