Lead times vary greatly depending on part complexity. Generally 3 to 12 weeks is typical for tooling and first casting. Then 1 - 3 weeks for production after sample casting approval. By utilizing casting drawings designed with surface models, we can cut 2 to 5 weeks off from production tooling. There are rapid prototyping methods available; however, tolerances, surface finish, and cost will be considerations. Establishing geometric shrinkage's is a major cost savings overall. On the other hand, faster to market does have it's overall cost advantages, offsetting prototyping costs. As was stated before, if prototype tools are made, much of the casting development can be done during permanent tool construction.