More space because you want to avoid stacking boxes. Everything needs a shelf to be on.Perhaps not even take up more space. With "chaotic storage", the robot stores product where they fit and it of course has a constantly updated map running so it know where to place a box sized X and remembers where to go get it.FIFO would be a big mess without a computer.Having spent YEARS creating, implementing and operating a FIFO operation involving fewer than a thousand products, I can tell you that the logistics and handling of differing shelf lives, rates of degradation and “lost motion” due to the need to physically move things numerous times, are overwhelming. I can’t even imagine the requirements with tens of thousands of products - many needing different storage conditions - with lives hanging in the balance. Do you treat a drug that will degrade into a toxic substance differently from one that simply loses efficacy? Do we even know that about all of them? I don’t think the intractability of this problem can be overestimated.I was thinking FIFO. And note that most drugs actually have a substantially longer shelf life
FIFO sounds so simple and elegant as a foolproof solution.
IT’S NOT. It’s expensive and prone to error - deadly error, in many drugs’ cases.
With a computer it's a bunch of boxes with barcodes, go get the right box. The whole thing perfectly well could be automated although that would take more space. All boxes are of uniform size (they may actually not be full if it's a low-demand product) and on shelves they fit. A fairly simple robotic grabber moves to the right position, checks the barcode and uses a camera for fine positioning to grab the box.
Think of how airport luggage systems actually work behind the scene--everything goes in bins, routing the bins to the right plane or the right baggage carousel is completely automatic. Same thing, but there are storage shelves. In the long run I expect it would save money.
I've seen an automated pharmacy twenty years ago at a navy shore facility. To my knowledge, they've not been embraced beyond the hospital level.
And without close to uniform box sizes you would eventually end up with the same problem we have with computer memory--it becomes full of small fragments that are useless. I think your experience with them not going beyond the hospital level makes sense--I've never seen a retail pharmacy where such a system would be worthwhile.
And note that you can do the same thing even without the robot. You scan a box in, the computer tells you where to put it. You want a box, the computer tells you where to go get it--put a blinky light on each space, the end of each shelf and the top of each rack. Simply go where it says.