Use the chart....Yes, but chart indicates the smallest piece is '3 3/4' and there is a note that says that is NOT inches...totally confusing.
Use the chart as a guide. Start as far left as you can. If you look at the chart the FIRST cut is the full length of the strata, which may or not be 21 3/4 inches long. You need all of the cuts EXCEPT the first OR last.
Then move your ruler down 3/4 inch...and cut as the pattern indicates.