This document contains three papers from a symposium on tools in human resource development (HRD). "Game Theory Methodology in HRD" (Thomas J. Chermack, Richard A. Swanson) explores the utility of game theory in helping the HRD profession address the complexity of integrating multiple theories for disciplinary understanding and fulfilling its strategic roles. "Scenario Planning: An Examination of Definitions, Dependent Variables, and Support for Development as an HRD Tool" (Thomas J. Chermack, Susan A. Lynham) reports on an exploratory study in which the literature on scenario planning was reviewed, analyzed, and synthesized to develop an integrative definition of scenario planning that captures its essences and targeted outcomes (changed thinking, informed narratives or stories about possible or plausible futures, improved decision making about the future, and enhanced human learning and imagination) and determine the relevance and use of scenario planning for HRD practitioners and scholars. "Appreciative Inquiry: Assumptions, Approaches, and Implications for HRD" (T. Marshall Egan, Cynthia McLean Lancaster) summarizes a study in which a literature review and examination of the views of experienced HRD practitioners resulted in the identification of 16 specific strengths and 10 specific weaknesses of the appreciative inquiry approach. All three papers include substantial bibliographies. (MN)