If you use boneless skinless chicken breasts (about 2lbs) set the time for 6 minutes, 3lbs of chicken 8 minutes. If you cut the chicken up smaller before cooking reduce the time by a minute or two so it's not tough. Test the temperature of the chicken with a thermometer, you can always put the lid back on the pot and allow it to cook another minute without setting more time and actually turning it on, the "warm" feature will keep the liquid that the chicken is in really hot. If your chicken is frozen add 2-5 minutes. If you have really thick chicken and can't cut it because it's frozen it may take a couple more minutes. Just wait 2-5 minutes to release pressure. You can always allow for a natural pressure release without pressing the steam release and letting out all the steam quickly. The time for the pot to release pressure naturally is about 10 minutes, which will ensure the chicken is cooked fully.