Production systems worldwide are using techniques and technologies to manage their knowledge and experience better. Their objectives are to improve the quality of knowledge and experience sharing by exploiting and explicit knowledge of successes and failures. Knowledge's gained from positive or negative experiences had to be well managed and are one of the important sources of knowledge today.
In these article I make an introduction in lesson learned, I explain why lessons learned need to use in an production system producing molds, I present the necessary steps in introducing lessons learned and I explain how it's made the continuous improvement using lessons learned in an production system producing molds and why it's necessary that. | 
