Is using MFR for material selection for injection molding the best choice?

Part failure could have easily been discovered and mitigated with this testing process

Validating your plastic injection molded part before it enters the field is the purpose for which the Moldflow software was created.

if there is high cavity pressure, then the aluminum tool will want to deflect much more than a steel tool.

Knowing the difference between the homopolymer v. copolymer is critical with regards to the impact on final part quality