A method for developing a conceptual design for a product or service involves defining conceptual design project goals and parameters and then creating a project team representing several diverse types of intelligences. The speed-control circuit includes a pulse generator, a current source circuit, a filter circuit, an error amplification circuit and a PWM circuit. Therefore, the method of the invention includes a high-speed path to the host computer system and the volatile memory devices designed using the methods of the invention are faster than prior art devices, use less power and are lower cost. The advertisements to be inserted into advertising avails are they are detected are determined by utilizing queues stored in memory corresponding to each presentation channel.