The kitchen is one of the most complex area in the home because that's where you find all the electrical appliances, which power points to be mounted at low heights or above counter, double pole switches for built in appliances, light switches for ceiling and tasklight. Not forgetting water points for kitchen sink, washing machine, water filter or even a water point for fridges too. Sometimes if home owners have a dish washer, yeap then we also have to factor a water point that connects to the dish washer.
Besides the electrical and lighting points, there's also the gas piping considerations on how to run. Which is why some times the timing that we take to discuss the kitchen setting out on site can take up to more than 1 hour.