The sample is selected for each study based on the study specifications provided by the client. We do, however, have procedures within our panel management system to control both the quality and timing of the sample released. When designing our sampling frame, we are careful to prepare a randomly selected sample to ensure the outgoing sample mirrors the universe of the study targets. We also suggest releasing the sample in stages and within an appropriate fielding period, so that even the hard to reach are given an opportunity to participate. Samples can be deployed in waves, and can be controlled by time zone, geography (regions, DMAs, postal codes, etc.), and by other means as available, and requested by the client.