"Lean Six Sigma" is a methodology used in factories/workshops/airlines etc to improve efficiency. One aspect of it is that everything (from tools & vehicles to rubbish bins) has a marked home and when it is not in use, it is returned to its home. It is a good system for keeping workshops tidy, and means you can (in theory) easily find equipment/tools when it is not being used. Efficiency is improved because staff don't waste time looking for stuff and also you may not need to buy as much spare stuff once everyone can find the stuff you already own. It relies on people keeping each other honest/managers kicking the arse of people who don't tidy up after a job.