2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47005The measurement and precision at B physics experiment are reviewed by taking into account of the numbers of B mesons to be produced in the future experimental projects. With $10^9$ or more B mesons we will be able to fix the parameters in Kobayashi-Maskawa matrix elements or find a signal of new physics.11 pages, 2 figures in eps format, LaTeX, epsfig.sty, To appear in the proceedings of ''Mass and Mixing of Quarks and Leptons" at Shizuoka, 1997High Energy Physics - Phenomenologytext