Answers lead the operator to the best solutions to fit the required machining scenario. Answer no to that original question about material hardness, and the matrix delivers a new set of questions to help moldmakers identify precisely what they are working with and the best approach to machining. Each of the matrix paths leads to one of four distinct machining solutions. Ideal in its simplicity, the matrix doesn't exist in a shop floor vacuum. Its effectiveness is contingent on shop floor conditions and the variety of part requirements.
Surface finish can be deceptive.
Try measuring or testing polish requirements to determine actual surface integrity and efficiency to produce the required surface. In the case of tight tolerance requirements, weigh tool deflection against electrode deflection from hydraulic orbiting forces. Resources that help mold shops understand, embrace and utilize the latest techniques are as valuable as the techniques themselves. The knowledge is out there. The next step is to build on that knowledge with specific application training, installation training and ongoing application development assistance.