Devere realized this was a tedious way of drafting. Remember, they didn’t have computers or spreadsheets back then. Instead, Devere devised a set of rulers, called Graduated Rulers. The graduated rulers are, “a series of measures, which are successively graduated larger and smaller than the common inch measure, and are used to draft patterns for…

Responses
If I have this correct: I put all my measurements in the spreadsheet. I use a normal ruler for these measurements. No need for a graduated ruler. Correct?
Yes, that is correct. If something seems off, for example, taking a measurement incorrectly, you can compare it to the graduated measure to see how far off or close you are.
Do you have graduated rulers for sizes 52-56?