Next, you must design a way to train the person how to do the new task. Put your focus on the results you desire more than the method. We all obviously do things differently. The outcome is more important than the actual process. Hopefully, they will do it better.
Timing is also very important.
Be sure you choose the right time to do the training and the delegation. It will do no good to overload another person. Some people are capable of handling more than others. In other words, don't set them up for failure. The art of delegation is really a sharing of responsibility and authority with another.