We all know the benefits of using field programmable gate arrays (FPGAs): no NRE (non-recurring engineering costs), no minimum order quantities, and faster time-to-market. In an ideal world, designs would never need to be changed because of design errors, but we all know that sometimes this is necessary. However, a great number of people do not exploit the fact that the devices can be configured with test applications during the development and production test stage. This white paper explores efficient options to help in product development and to accelerate testing on the production line.