How robust is your circuit if the elements don't have the values (width, length, resistance, capacitance, etc.) that you assumed, but instead vary by say 20%? What if one is 20% too large and another is 20% too small? Try thinking along these lines and see if you can make your circuit robust enough to tolerate variations. It only watches for DC voltages or currents. Ive already set up sweeping the voltage source correctly, however the output option screen doesnt have any AC voltage probes. I want to sweep a DC voltage source and watch for magnitude of AC voltage (fixed at one frequency). I don't know if you are talking a circuit made with discrete elements or an integrated circuit, but in both cases the elements vary. I have trouble setting up parameter sweep in multisim. A very common problem is in statistical variation of the elements.

Or perhaps you assume that all elements are at the same temperature when in real life power dissipation in the elements makes them have slightly different temperatures. For example, in your simulation you usually assume all circuit elements are connected directly to the power supply, but in real life the elements are connected to the power supply through wires which have resistance and inductance.

Usually if you have a problem where the circuit works in the simulation but not in real life, the problem is not with the accuracy of the simulator, but with something you left out of the simulation.

Multisim 12 ac sweep