The design process should include extensive simulations and verifications, in order to obtain the highest manufacturing yields. The focus must be on quality, so ample time should be allotted for project completion, which is easier to do when you outsource. You usually end up paying dearly for this later. The amount of time between initial design concept and manufacturing varies greatly and depends on many factors, some of which the vendor can control. Bluetooth may not be the gating factor.
Cost also varies greatly from product to product, and can be improved with outsourcing.
An outsourced, customized Bluetooth design application can provide payment options that are unavailable in-house. Often, the completed wireless design can be purchased using one of a number of business models. The choice of business model often depends on the relationship between the design vendor and the customer. Another benefit of outsourcing is that the vendor should include a customer education component as part of its design services. Typically, the vendor will teach the customer how to reuse the Bluetooth wireless design in derivative products.