This document provides an overview of perspectives in human resource management and the evolution of the field. It discusses three main management perspectives: 1) the scientific or closed system focused on control and efficiency; 2) the human relations or semi-open system incorporated some welfare practices but still emphasized top-down control; and 3) the open system views the organization as organic and emphasizes developing human resources as key to performance. The document then discusses personnel management and its replacement by the contemporary field of human resource management, which is oriented toward business strategy and competitive advantage. It proposes using models to analyze the impact of different "hard" and "soft" HRM approaches on organizational outcomes.