This document summarizes and compares four models of human resource management (HRM): 1. The Fombrun, Tichy & Devanna model emphasizes the interrelatedness of HRM activities, organizational strategy and structure. It defines three levels of managerial work and argues HR systems should align with organizational strategy. 2. The Harvard model views employees as human resources with their own needs. It outlines four HR policy areas and their relationship to organizational commitment, congruence, competence and cost effectiveness. 3. Guest's model defines HRM in terms of six dimensions: strategy, practices, outcomes, and their relationship to behavior, performance and financial results. It positions HRM as strategic rather than traditional