Q strips are used for quality control, testing, and configuration of dye transfer matrix exposure and processing. There is nothing fancy about them, they are merely cut stips of matrix film.
Cut them in a darkroom, using paper trimmer adjusted for 5 inches to make cut “A”. this makes two big film pieces. Adjust the trimmer to 2 inches and cut each of the big sheets into smaller strips. Store these in a darkbox.
You can clip the corner, using a toenail cutter, to mark emulsion, if you can’t tell by curl and feel. I don’t bother, since I’ve done this for so many times and years.