You can fill up just the first page or the rest if you want to present to your superior a comprehensive detail of the person you recommend for succession. The first page is to show how critical in getting the next person in line. If no one is leaving or retire just leave it blank or put a zero and how critical it is put 1 or 2, and numbers of person identify the succession if just 1 put 1 if 2 put 2. (see the sample provided).