Floor And Ceiling Retirement Spending, With A Twist
In a 2013 article, a Vanguard research team headed by Colleen Jaconetti developed an alternative form of the floor-and-ceiling spending rule that relies on percentages rather than hard dollar amounts.
With their framework, the ceiling refers to a maximum percentage increase in spending each year, while the floor refers to a maximum percentage drop in spending for each year.
Pfau, Wade D. PhD, "Floor And Ceiling Retirement Spending, With A Twist" (2016). Faculty Publications. 618.