One of the most important aspects of a DFM is avoiding mistakes that could lead to quality and productivity issues during manufacturing. These quality issues in turn translate into production costs and, even worse, into customer complaints and potential returns.
Apart from avoiding potential quality costs, one of the main goals of a DFM is to optimize the design of the product so it can be manufactured in the most cost effective way. Making some of these decisions early on can generate great savings in the final product and process.
Finally, DFM can help to estimate timings for your product manufacturing. Selecting the right production methods and supply chain can accelerate the time to production and avoid delays on critical components.