As comfortable, hugging and archetype of attitude jeans is, have we wondered what is that attribute which makes a pair of jeans the way it is? The secret behind this is the very fabric it is made of i.e. Denim. It snugly adheres to the body and endures the rigor of time seamlessly. The never dying appeal for apparel derived from denim, most notably jeans, has made sure the demand for denim products remain high. This is a comprehensive study on causes of capacity constraints faced in denim industry, which includes a case study research on two of the leading denim manufacturers in Pakistan along with an overview of the denim industry and the current scenario of Pakistani denim sector.