Sina Seifee shares his script for Maya that allows you to easily randomize animation keyframes by value and by time all within a simple and compact interface.

very fast script to randomizes keyframes values and times

Simply select the range of keyframes that you want to randomize in the graph editor, and then provide a minimum and maximum value, and hit “Time” or “Value” from the interface, and the keys will be randomized based on the min/max floats. Check out the Keyframe Randomizer for Maya here.

keyframe-Randomizer-for-maya