After your death, many steps will still need attending to, and most of those go far beyond ensuring that your funeral takes place in the manner you deemed appropriate. Rather, your estate will need closing in the proper manner, and because you will not be around to ensure that takes place, you may want to utilize your estate plan to instruct how certain duties should be handled and who should handle them.
The person in charge of closing your estate is your personal representative. If you create a will, this individual will take on the role of executor, and you can indicate who you want to act in that position. Of course, because the person in this position has much power and responsibility, you will certainly want to choose carefully.