Prof. Dr. Christoph Roser is a blog by Prof. Dr. Christoph Roser on the different aspects of lean manufacturing and lean administration. The blog has a strong focus is on practicability, although some posts will also delve into theoretical details. This blog discusses the underlying fundamentals of the lean manufacturing approach as well as its specific tools. Many posts will describe common pitfalls in lean manufacturing, and information on different ways for training people in lean manufacturing will also be provided. Finally, historic development of manufacturing organization will be covered in some posts. The blog is aimed at industry professionals, with the goal of assisting in the management of day-to-day manufacturing problems. In theory, everything sounds easy; however, in practice, on the shop floor with its myriad of problems and significant complexity, implementing lean is an enormous challenge. This blog aims to help industry professionals with these tasks.