When exploring a design, it is always useful to make modifications to try to improve it. However, not every design variation is successful in improving the performance of the object. Simulations can help test multiple design variations in a short time. This removes the need to create multiple real models and test them all. Here you will perform a modification of the original bike crank and analyze how altering the design would impact the results. Then, you will learn how to apply design constrains to choose which of the two designs to use.