As long as the modified Fibonacci sequence rises by more than 60%, the exercise will likely provide comparable outcomes as the traditional Fibonacci series. The 60% limit is derived from Weber's law of visible differences, which states that humans are more likely to notice the difference between two things with considerably different weights than two with just a tiny weight difference. You may use a modified Fibonacci sequence that begins with a number other than 0 or 1. You may also start at 0 and 1 and double each number, for example, 1, 2, 4, 8, 16, 32. Whatever modification approach you use, make sure that your team's conversations are focused on accurately analysing each user narrative and not on the changed Fibonacci sequence.