Some Essential Formula and Example for Industrial Engineer (IE) Industrial engineering is a branch of engineering which is used to eliminate waste of time, money, materials, machine time, energy, person-hours, and other resources that do not generate value. As like other manufacturing industry, industrial engineering now widely used in textile and apparel industry. Textile and garment industry have to face heavy challenges due to various factors including global competition, production costs increase, less productivity/efficiency, labor attrition, etc. For overcoming those challenges industrial engineering knowledge and formulas are frequently used in apparel manufacturing industry. In this article I have given some important and popular terms and formulas o f industrial engineering. I have also given some examples for which reader can easily understand. Some Important Formula & Example for IE 1. Standard Pitch Time (S.P.T) = Basic Pitch Time (B.P.T) +