This book contains different types of inventory models. Like, Supply chain with trade credit, inventory policies under preservation technology, Trade credit as an advertising tool in the supply chain model, Optimal strategies for the retailer under promotional tool, Two-tiered pricing policies of logistics, Inventory modeling of deteriorating item and preservation technology with an advance payment scheme, Supply Chain Inventory Model for Multi-Items with up-stream permissible delay under Price Sensitive Quadratic Demand, Optimum inventory control for imperfect quality item with maximum lifetime under Quadratic demand and Preservation Technology Investment, Inventory control policies for substitutable deteriorate items under quadratic demand, Optimal control analysis for service, inventory and preservation technology investment. This book is very beneficial for beginner researcher as well as an advanced level researcher for their research study. The main contribution of this book is a different type of model, their analysis and results.