對(dui)于(yu)高風(feng)險(xian)(xian)(xian)或大型(xing)、工(gong)藝(yi)復雜的(de)(de)(de)(de)用人(ren)單位，在進(jin)行危(wei)(wei)害(hai)辨識和(he)(he)(he)(he)風(feng)險(xian)(xian)(xian)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)時，宜(yi)采用系(xi)(xi)統(tong)風(feng)險(xian)(xian)(xian)分(fen)析及評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)方(fang)法(fa)(fa)。系(xi)(xi)統(tong)風(feng)險(xian)(xian)(xian)分(fen)析及評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)方(fang)法(fa)(fa)是(shi)對(dui)系(xi)(xi)統(tong)中的(de)(de)(de)(de)危(wei)(wei)險(xian)(xian)(xian)性(xing)、危(wei)(wei)害(hai)性(xing)進(jin)行分(fen)析評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)的(de)(de)(de)(de)工(gong)具(ju)，目(mu)前已開(kai)發出(chu)數(shu)十(shi)種(zhong)(zhong)(zhong)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)方(fang)法(fa)(fa)，每(mei)種(zhong)(zhong)(zhong)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)方(fang)法(fa)(fa)的(de)(de)(de)(de)原理、目(mu)標、應(ying)用條件、適用的(de)(de)(de)(de)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)對(dui)象(xiang)、工(gong)作量(liang)(liang)均不(bu)盡相(xiang)同(tong)，各有其特點(dian)和(he)(he)(he)(he)優缺點(dian)。按其評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)方(fang)法(fa)(fa)的(de)(de)(de)(de)特征一般可分(fen)為定(ding)(ding)(ding)性(xing)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)、定(ding)(ding)(ding)量(liang)(liang)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)和(he)(he)(he)(he)綜(zong)合評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)。 定(ding)(ding)(ding)性(xing)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)：根據人(ren)的(de)(de)(de)(de)經驗和(he)(he)(he)(he)判斷能(neng)力對(dui)生產工(gong)藝(yi)、設備、環境、人(ren)員、管(guan)理等方(fang)面的(de)(de)(de)(de)狀況(kuang)進(jin)行評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)，如(ru)安全檢查表等。 半定(ding)(ding)(ding)量(liang)(liang)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)：用一種(zhong)(zhong)(zhong)或幾種(zhong)(zhong)(zhong)可直接或間接反映物質和(he)(he)(he)(he)系(xi)(xi)統(tong)危(wei)(wei)險(xian)(xian)(xian)性(xing)的(de)(de)(de)(de)指(zhi)數(shu)(指(zhi)標)來評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)系(xi)(xi)統(tong)的(de)(de)(de)(de)危(wei)(wei)險(xian)(xian)(xian)性(xing)大小(xiao)，如(ru)物質特性(xing)指(zhi)數(shu)、人(ren)員素質指(zhi)標等。 定(ding)(ding)(ding)量(liang)(liang)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)：用系(xi)(xi)統(tong)事故(gu)發生概率和(he)(he)(he)(he)事故(gu)嚴重程(cheng)度來評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)。 危(wei)(wei)險(xian)(xian)(xian)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)的(de)(de)(de)(de)內容(rong)相(xiang)當豐富，評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)的(de)(de)(de)(de)目(mu)的(de)(de)(de)(de)和(he)(he)(he)(he)對(dui)象(xiang)不(bu)同(tong)，具(ju)體的(de)(de)(de)(de)評(ping)(ping)(ping)價(jia)(jia)(jia)(jia)內容(rong)和(he)(he)(he)(he)指(zhi)標也(ye)不(bu)相(xiang)同(tong)。