The goal of avionics suppliers is to provide air crews timely and accurate information from various other aircraft systems in order to improve the likelihood of mission success and safety. This goal can be met by accurately defining the desires and requirements of the user. Rockwell uses a number of techniques to accomplish this goal. The final display system may well be defined by a number of these inputs combined through a series of trade-offs. Rockwell is a diversified company that addresses many different display markets. This provides a unique opportunity to compare various techniques for developing and meeting user requirements.