Astro 2020 APC White Paper The need for better tools to design future CMB experiments Thematic areas : Primary Area : Cosmology and Fundamental Physics

Co-authors: A.J. Banday, R. Belen Barreiro, Anthony Challinor, Krzysztof M, Górski, Brandon Hensley, Tess Jaffe, Jeff Jewell, Brian Keating, Alan Kogut, Charles Lawrence, Georgia Panopoulou, Bruce Partridge, Tim Pearson, Joe Silk, Paul Steinhardt, Ingunn Wehus & Jamie Bock, Brendan Crill, Jacques Delabrouille, Olivier Doré, Raul Fernandez-Cobos, Anna Ijjas, Reijo Keskitalo, Alexei Kritsuk, Anna Mangilli, Lorenzo Moncelsi, Steve Myers, Bryan Steinbach, Matthieu Tristram.