Operation Reinhard was conceived in the Wannsee meeting in 1942. It was the name to exterminate the Jewish problem. It was a meeting to draft out the plan to discuss the Jewish problem.
It was Hermann Goring who had sent telegram to find a solution. At the time of the meeting, the Germans had advanced into Soviet union and had so many prisoners.
The meeting was to help coordination and cooperation of relevant departments to make sure swift process. The plan had taken into consideration that the new conquered areas will have millions of Jews.