Over the years I've found the Rainbow Scrap Challenge (RSC) has been a fun way to use up scraps of a different color each month. I used to keep my scraps in bins by width and finally last year I emptied the 4.5, 3.5, 2.5 scrap bins. For now I'm keeping the 2 and 1.5 inch bins. Anyway...in previous years of the RSC I would pick a block or blocks to make with scraps from each scrap bin. Now that I've emptied most of my scrap bins I now am working with scrap chunks to make my RSC blocks. I store my scrap chunks by color and define them (roughly) as anything larger or longer than a 4.5 square and less than a Fat Quarter (FQ).
So...now that I'm using scrap chunks I cut off whatever I need to make my RSC blocks. Then I decided I would TRY at the very end of the month to use up whatever is left of the "cut off" after I make my blocks rather than store leftover "cut offs" away anywhere or put them back in with the scrap chunks.
At the end of the month I've been making a variety of different blocks from those "cut offs" for the Parts Department.
I've been making Nine Patches from the 2.5 inch leftovers or I've been cutting them into squares or I've been cutting them into 2.5 x 3.5 rectangles or I sew anything less than a square into a strip.
The 3.5 inch leftovers get made into Four Patches for the Parts Department or into squares or 2.5 x 3.5 rectangles or squares or strips.
The 2 inch leftovers also get sewn into Four Patches for the Parts Department or cut into squares.