When McClarin Plastics receives a quote, the Project Engineer will contact the customer to see what their needs may be on a given part. In some cases the project can go straight to production tooling without producing a "prototype part." Prototype parts are a representative of what the complete part will actually look like. In most cases, the prototype is slightly larger than the actual part due to aluminum shrinkage of the final production mold.
When quoting a project, there are charges associated with prototype molds and parts that are brought to the customers' attention. Prototyping is a good way to go in case a given project is not 100% known to be workable. It is much easier and less expensive to modify a wood prototype mold than a production aluminum mold.