Maybe some of you, but I'm sure the true geeks reading this have! I looked around and nothing fit my budget, so i decided to build one. Rather than attempting to make a display that you could see through, which seemed far too complicated for my taste, I decided to use a camera and screens to do the job.
Lean manufacturing or lean production, often simply  lean , is a systematic method for the elimination of waste ( Muda ) within a manufacturing system.ean principles are derived from the Japanese manufacturing industry. The term was first coined by John Krafcik in his 1988 article, Triumph of the Lean Production System, based on his master's thesis at the MIT Sloan School of Management.
With lean production, components are delivered to each team's work station just-in-time, and every worker is encouraged to stop production when a fault is discovered. This is a critical distinction from the classic assembly-line process, where stoppages are expensive and to be avoided at all costs.