The minimum and recommended specifications for the range of XR HMDs are actually not quite straightforward. To really understand it all, you have to think in two dimensions--on both X and Y axes, if you will. Weâre looking at what a range of PC hardware can support, but also what a range of HMD hardware demands.
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.
Lean construction is a âway to design production systems to minimize waste of materials, time, and effort in order to generate the maximum possible amount of value, (Koskela et al.2002).hile lean construction is identical to lean production in spirit, it is different in how it was conceived as well as how it is practiced. There is a view that adaptation of Lean Manufacturing/Production forms the basis of Lean Construction.