Is it for extended queen caging in varroa control methods?
If it was predictable, it would be a neat way to winter a few extra queens? Is that queen excluder dimension or small enough to keep workers out?Varroa control mid-summer/late-summer - to create brood-less windows for treatments (without colony splitting).
Also for managing the flow harvest - the same, to create brood-less windows.
Also for multi-queen projects (including wintering).
Many uses if you think about it.