"When beginning a new computer hardware design, one of the factors I consider is how to make it scalable. This is important because it allows organizations like Cisco to use the same design as its use grows or the applications it runs expand. Methodologies I use to incorporate scalability into my designs include providing additional real estate on the motherboard, including provisional circuits that can be used later for additional memory and I/O, and creating extra expansion slots. It is much less expensive to do this during the initial design than to have to redesign a new system to accommodate the additional capacity."