This module is the most challenging of the 5 modules. The participant first learns the basics of inventory control, and how it fits with the other logistics sub-sectors. The participant learns how to describe and distinguish among methods of inventory control to classify and categorize materials, and about the methods of inventory control. The module describes the categories, costs and functions associated with inventory, as well as the inventory cycle. In the second section, the participant learns how to use basic technology and how to use spreadsheets and databases to input, read and interpret inventory management and control (for example, to calculate ABC method of inventory classification). Finally, the participant learns how to identify and describe the purpose of key principles of inventory management and control, and to describe and demonstrate product movement and replenishment strategies.