About when were the homeric epics composed or when did they assume their final form after centuries of development in the oral tradition

The exact time of the writing of Homer's epics is really unknown, though is is believed that he lived between the years of 850 and 750 BC, knowing this most people assume the epics were written between 700 and 750 BC. Many years of these epics being told in oral traditions followed and can be credited with them having their final form.