This document analyzes four major industrial companies - Raytheon, Boeing, 3M, and Caterpillar. It identifies common risks across the industry like economic conditions, government policies, foreign exchange rates. It also outlines firm-specific risks for each company. The document then discusses how each company manages risks, like diversifying sales, hedging foreign exchange, and monitoring contract performance. It analyzes the optimal capital structure for each firm based on their cost of debt and equity. While Raytheon and Boeing maintain low debt ratios given their large scale, 3M and Caterpillar's capital structures may gradually change due to their different cost of capital profiles.