The Financial Planning Association (FPA) divides retirement income strategies into three categories: systematic withdrawals, time-based segmentation and essential-versus-discretionary income. Time-based segmentation provides a middle ground between the two extremes represented by systematic withdrawals (relying on a total-return investment portfolio for all distributions) and essential-versus-discretionary (using insurance-based products to implement a lifetime-income floor before considering investments).
Pfau, Wade D. PhD, "Time Segmentation as the Compromise Solution for Retirement Income" (2017). Faculty Publications. 747.