Lebanese industries are growing so fast and expanding their businesses while managing their time, inventory, labor, quality and other production factors in order to increase productivity and output while reducing waste. For that, lean manufacturing aims to reduce the inventory and gain more profits while getting a better quality of the goods delivered to the customers. The aim of this Article is to assess and explain, through a survey, to which extent lean tools are implemented in a Lebanese pharmaceutical industry and to find out if there is any relationship between the application of these tools (Kaizen, JIT, TPM and standardization) and the effectiveness of lean on the productivity.