Which technique should be used to create a length increase in the design of graduated and layered haircuts?

To create a length increase in graduated and layered haircuts, overdirection is the technique that should be used. Overdirection involves pulling sections of hair away from their natural fall before cutting, effectively creating length and volume at the back while ensuring a more even layering effect throughout the haircut.

This technique allows stylists to establish a longer appearance in the graduated layers by directing hair that typically falls forward or straight down, back towards the anchor point. As a result, this movement gives the hair a more dynamic shape while preserving the visual balance and aiding in the overall flow of the hairstyle.

Other techniques, while useful in their contexts, do not directly focus on increasing length in the same way. Beveling, for instance, typically creates soft, rounded edges rather than length. Stacking is used more for creating bulk and definition in specific areas, and traveling involves moving to different sections of the head for cutting but does not specifically address length increase in graduated layering. Thus, overdirection is the essential technique for achieving the desired effect in this haircut style.