The technological sophistication of advanced weapons systems and battle stations places increasing demands on system operators. In order to guide system design, tranining programs, and decision support projects, there is a strong need for knowledge elicitation methods to represent the naturalistic decision making of operational personnel. The primary objective of phase ii is to develop and validate a knowledge elicitation methodology. This work will build on the results of phase i, which established the feasibility of our methods for describing the mental models of highly experienced fire ground commanding, context-rich environments. Phase ii will refine our methodology and expand it to cover situational awareness aspects of decision making. Phase ii will also evaluate the validity and reliability of the methodology, and then extend it to military tasks such as intelligence analysis or battle management. Finally, pilot studies will be performed to apply our knowledge elicitation methods to problems of training, personnel selection, and decision support requirements.