Proposal Review Process
A total of 1773 proposals were submitted in response to the ALMA Cycle 7 Call for Proposals. The proposals were reviewed during a meeting in Atlanta (USA) on 17-21 June 2019. The review committee consisted of 158 Science Assessors grouped into 25 ALMA Review Panels (ARP) that were distributed across five scientific categories: 1. Cosmology and the high redshift universe (6 panels) 2. Galaxies and galactic nuclei (6 panels) 3. ISM, star formation and astrochemistry (6 panels) 4. Circumstellar disks, exoplanets and the solar system (5 panels) 5. Stellar evolution and the Sun (2 panels). Most review panels contained 6 members each. Two panels in Category 4 and both panels in Category 5 contained eight Science Assessors. Science Assessors were selected on the basis of scientific specialization while having a regional affiliation that closely matched the nominal ALMA regional shares of observing time. The full list of Science Assessors is provided in the Appendix. Eighteen of the 25 Panel Chairs served on the ALMA Proposal Review Committee (APRC) together with the APRC Chair, Masao Saito. The Review Panels conducted the initial scientific reviews and recommended which Large Proposals should be further discussed by the APRC. The APRC conducted the final review to recommend which Large Programs should be scheduled. The Joint ALMA Observatory (JAO) created an observing queue and assigned a priority grade to each proposal after considering the scientific rank determined from the review process, the share of observing time for each region, and proposal pressure for the various configurations and right ascension. Priority Grade A was assigned to the top ranked proposals up to a cumulative sum of 1418 h of requested 12-m Array observing time. Grade B was assigned to high ranked proposals to fill the remaining time. Grade C was assigned to proposals that oversubscribed the time in a configuration by approximately 50%.
Proposal statistics
Of the 1773 proposals submitted, 128 received the highest priority of Grade A, 270 received Grade B, and 236 received Grade C. The Grade A and B proposals requested an estimated 4033 h of execution time on the 12-m Array. Together with the estimated 270 h of Cycle 6 Grade A proposals that will be carried forward to Cycle 7, this constitutes the 4300 h of 12-m Array time expected to be available for successful executions in Cycle 7. The titles, investigators, and abstracts of the Grade A and B projects are available from the ALMA Science Portal. Tables 1 and 2 list the number and requested time for proposals grouped by region and science category, respectively. Table 3 lists the number of Grade A and B projects for different proposal types. Various metrics of the proposal data are presented in the figures. Fourteen Large Proposals were submitted in Cycle 7. As recommended by the APRC, the following four Large Programs have been scheduled : 1. ALMAGAL: ALMA Evolutionary study of High Mass Protocluster Formation in the Galaxy  (2019.1.00195.L) PI: Sergio Molinari (EU); coPIs: Paul Ho (EA), Peter Schilke (EU), and Cara Battersby (NA) 2. Early Planet Formation in Embedded Disks (2019.1.00261.L) PI: Nagayoshi Ohashi (EA); co-PIs: John Tobin (NA) and Jes Jorgensen (EU) 3. VERTICO: The Virgo Environment Traced in CO (2019.1.00763.L) PI: Toby Brown (NA); coPIs: Christine Wilson (NA), Aeree Chung (EA), and Alessandro Boselli (EU) 4.  REBELS: An ALMA Large Program to Discover the Most Luminous [CII]+[OIII] Galaxies in the Epoch of Reionization (2019.1.01634.L) PI: Rychard Bouwens (EU); co-PI: Valentino Gonzalez (CL), Dan Stark (NA), and Hanae Inami (EA) Collectively these four Large Programs were assigned 280 h on the 12-m Array and 182 hours on the 7-m Array.
Figure 8. Regional distribution of the Cycle 7 APRC and ARP members Appendix: Cycle 7 APRC and ARP members