<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">do not partially cook meat on a smoker then re-cook to "finish" it. that just leads to food borne illness. </div></BLOCKQUOTE>
Not necessarily. In fact, not usually at all unless 'partially' cooked means not very cooked at all.
Though I quite agree with Larry and would cook till done on the first go, this has more to do with cooking convenience than anything else. A brisket taken to 165 will be well pasteurized. The issue, then, becomes what happens after cooking. As long as the brisket is cooled relatively quickly, then stored chilled, it can safely be further cooked. The very same thing applies to meat cooked fully in advance. The thing is to then go for quick and thorough cooling after cooking. The meat can then be safely reheated when needed.
The key issue here is contamination by Staph. aureus, something that can occur after cooking, especially if meat is handled, when cooling is not quick enough or thorough. Staph. grow best when not competing with spoilage and other bacteria (cooking eliminates these) so, if the temps are right (the meat is not thoroughly cooled or has taken too long to get cool) Staph. grow and, when the populaton is high enough, produce heat resistant toxins -- that even very high heat won't touch.
As long as the food in question is properly cooked and then properly cooled it can undergo further cooking (or reheating) when the need arises without issue. Still, again, I'd cook the brisket all the way, at first.