As applied to aircraft maintenance, LEAN is directed at removing duplicated work. The result in civil aviation results in a slimmed down approved maintenance schedule and simplified work processes. You have a panel open for a particular task? The Corrosion Control & Prevention Programme requires access to the same location, but at a slightly different time? Combine the two tasks and you only open the panel once. Way, way back in the sixties we in the RAF called it "Opportunity Servicing". Equalised Servicing is another example. Anyone remember Hollerith Codes? What was the data used for? Removing duplicated tasks was one.
There's nothing new about LEAN except the name and from what I'm reading here, those who are imposing the concept on the modern military need to be trained in the process before they're let loose on the poor old shop floor chaps. What's been put forward on here certainly hasn't got much to do with LEAN as I understand it.