Muc ti€u quy dinh nhfing thudc tinh gal crla fre th6ng. Muc ri6u co th€ d6n h0 rh6ng ph6t tri6n 1Yot tinh, am tinh hodc ngoai bi6n. Mot he th6ng oa riipc iicu luon 16, rrienru xung d6t hoic d6ng thu6n gifia c6c muc ti6u. Suxung ddt hodc hoic dong thuan c6 the d6n d6n tilc d6ng thric dAy ho4c tri kdo su phiit tri6n cria h€ thdng. Sau ddy Id dpc di6m cria hQ th5ng xdt theo tirip cAn muc ti6u. H( elon mqc ti€u HQdon muc ti€u ddc trung bo.irn6t muc tiOu duy nh6t. Chdng han, chi6c oien tnJui oc uan irra uun a5ri.0 m6t muc ti€u duy nh6t, ld di6n ddm; crii d6ng ho ban clau cfing chi c6 m6t r n;;;ilil;inoi giun. Nhung trong tu nhi6n vd x5 h6i, do sr,r ;6ng tao cria nguoi sri. dung, c6c vdt dung d€u dAn dAn ch0a dung th€m nhii:u muc ti€u. ching 1in, aig, thoaithuc hi€n th6n chric ndng b6o thd.i titlt, h6i clia chi, h6i gid,.v.v..; dong h6.cfingth€m mlrc ticu bdo thri.c, xem lich, trang sri.c, v.v... chinh su da muc ti€Lr dd g6p phAn ldm n€n tfnh da dang, phong phli vd phLic tap cia c6c Ii6 thdng. HQ da m4tc fiAu He.du muc ti€u Id h€ th6ng chfia dung nhidu horr m6t m,c ti6u. 9.hln hqn, Miiy rinh, c6inuc ti€u ,; durg JJ rrrir,i;, u, thao vdn ban, gti thu, chat, chup hilh.n3i 1?n8: vv...; Di ngugc lai li.ch sritir khi duoc ,inr, ,u, vdo d6u th6p ni6n 1940, k6o ddi sudt thap ni6, 1950 1960, m6y tfnh hAu nhu chi thpc i,ign Juy nh6t m6t muc ri6u Id tfnh todn c6c bdi to6n k thuat, g?,. b.i€, rd k thu4t qu6n ss, .oi dcn i. tti,dr l;;;:i;;;ray thi chring ta khong con co thc dem 16 .6 bao nhl€u,muc ti€u trong c6i h9 thong mriy tfnh ndy nfi.a. Tuy nhi€n, gi0a cdc muc ti€u trong he ,l5ntc6 nhirng q ne r