I want to know the answer to the following question:
How are parameters chosen in a switching circuit?
All the background I'm provided with is that "Parameters are chosen such that the "off" output is limited to leakage currents too small to affect connected circuitry; the resistance of the transistor in the "on" state is too small to affect circuitry; and the transition between the two states is fast enough not to have a detrimental effect.". Is that enough to answer the question?
Answer: yes