Concurrently filing the Immigrant Petition and the Adjustment of Status application allows the USCIS to begin adjudication of both cases at the same time. Each case progresses according to the USCIS processing times. For example, the USCIS may take four months to adjudicate an Immigrant Petition and take 6 months to adjudicate an Adjustment of Status application. By filing both cases at the same time, it should eliminate the several months delay for the Immigrant Petition to be processed separately before filing the Adjustment of Status application. Please note that an Adjustment of Status application cannot be approved until the underlying Immigrant Petition is approved