Let's assume that during the development process you discover that the tool design is not satisfactory. Then it is also to be expected that not only the quality of the tool itself, but also that of the end products will leave something to be desired.
Fortunately, you identified the issue early. Just think of the failure costs you would incur ! The earlier you identify defects in the design of the tool, the lower the defect costs. At the same time, this increases quality throughout the product life cycle with minimal tool wear.
Have you discovered quality deficits during the tool development process and do not know how to fix them ?
Or do you even have a product idea and do not know how to get from the idea to the complete tool design, and thus closer to product manufacture ?