2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47674We discuss a new general class of mass matrix ansatz that respects the fermion mass hierarchy and calculability of the flavor mixing matrix. This is a generalization of the various specific forms of the mass matrix that is obtained by successive breaking of the maximal permutation symmetry. By confronting the experimental data, a large class of the mass matrices are shown to survive, while certain specific cases are phenomenologically ruled out.Latex, 8 pages, talk given at the APCTP Workshop, Pacific Particle Physics Phenomenology, Seoul, Korea, 31 October - 2 November, 1997High Energy Physics - Phenomenologytext