Which of these is NOT one of the three standard steps to follow when selecting a data structure to solve a problem?
Knowing the basic operations required to solve your problem is the first step to selecting a suitable data structure.
Knowing the resource constraints for your problem's basic operations is the second step to selecting a suitable data structure.
Once you know the basic operations and their resource constraints, then you can select a data structure that matches.
Many problems do not require that you run simulations to determine the expected times for alternative solutions.