1、客觀條件是影(ying)響(xiang)(xiang)和制約工程(cheng)預(yu)決(jue)算準(zhun)確性的(de)重要因(yin)素。大家知道，工程(cheng)設計(ji)圖紙是計(ji)算工程(cheng)量的(de)依(yi)據，而工程(cheng)設計(ji)要受到(dao)外界客觀條件的(de)影(ying)響(xiang)(xiang)和制約，在工程(cheng)實(shi)施(shi)過程(cheng)中，由(you)于種(zhong)種(zhong)原(yuan)因(yin)會造(zao)成原(yuan)有設計(ji)的(de)變更，使工程(cheng)預(yu)決(jue)算隨著實(shi)際情況的(de)變化而變化，其準(zhun)確性難以保證。
2、定(ding)額(e)(e)項(xiang)(xiang)目錯套影響工(gong)程預決(jue)(jue)算的準(zhun)(zhun)確性(xing)。在(zai)工(gong)程預決(jue)(jue)算中，由于(yu)地區不同(tong)(tong)、行(xing)業不同(tong)(tong)，執行(xing)標(biao)準(zhun)(zhun)也有所不同(tong)(tong)，有關部門缺(que)乏有效的監(jian)督(du)，定(ding)額(e)(e)項(xiang)(xiang)目錯套現象(xiang)時有發生，影響工(gong)程預決(jue)(jue)算的準(zhun)(zhun)確性(xing)。
3、工(gong)(gong)程(cheng)(cheng)(cheng)預(yu)決算人(ren)員(yuan)的(de)素質對(dui)工(gong)(gong)程(cheng)(cheng)(cheng)預(yu)決算的(de)準確性有一定影響(xiang)。如果工(gong)(gong)程(cheng)(cheng)(cheng)預(yu)決算人(ren)員(yuan)缺乏一定的(de)專業知識和設(she)計、施工(gong)(gong)等(deng)工(gong)(gong)程(cheng)(cheng)(cheng)相關的(de)知識，對(dui)業務技術不能做到精益求精，或(huo)者缺乏認真負責(ze)的(de)工(gong)(gong)作態(tai)度和優良的(de)職(zhi)業道德，就(jiu)會在工(gong)(gong)程(cheng)(cheng)(cheng)預(yu)決算過(guo)程(cheng)(cheng)(cheng)中出現差錯，從而影響(xiang)工(gong)(gong)程(cheng)(cheng)(cheng)預(yu)決算的(de)準確性。
4、虛增(zeng)工(gong)(gong)(gong)程(cheng)量(liang)(liang)(liang)影響(xiang)(xiang)工(gong)(gong)(gong)程(cheng)預決(jue)(jue)算(suan)的準(zhun)確(que)(que)性(xing)(xing)(xing)。在工(gong)(gong)(gong)程(cheng)預決(jue)(jue)算(suan)中(zhong)，有(you)的施工(gong)(gong)(gong)單位(wei)違反(fan)國家有(you)關規定(ding)，虛增(zeng)工(gong)(gong)(gong)程(cheng)量(liang)(liang)(liang)，影響(xiang)(xiang)工(gong)(gong)(gong)程(cheng)預決(jue)(jue)算(suan)的準(zhun)確(que)(que)性(xing)(xing)(xing)。由于虛增(zeng)工(gong)(gong)(gong)程(cheng)量(liang)(liang)(liang)，在竣工(gong)(gong)(gong)結算(suan)中(zhong)難(nan)以(yi)進行全面而科學(xue)地審核，往往采取重復計算(suan)工(gong)(gong)(gong)程(cheng)量(liang)(liang)(liang)，影響(xiang)(xiang)工(gong)(gong)(gong)程(cheng)預決(jue)(jue)算(suan)的準(zhun)確(que)(que)性(xing)(xing)(xing)。另外，合同條(tiao)款的不明確(que)(que)性(xing)(xing)(xing)也(ye)影響(xiang)(xiang)工(gong)(gong)(gong)程(cheng)預決(jue)(jue)算(suan)的準(zhun)確(que)(que)性(xing)(xing)(xing)。由于部(bu)分(fen)工(gong)(gong)(gong)程(cheng)項目(mu)在合同條(tiao)款確(que)(que)定(ding)中(zhong)缺乏規范性(xing)(xing)(xing)、約束性(xing)(xing)(xing)，導致工(gong)(gong)(gong)程(cheng)預決(jue)(jue)算(suan)中(zhong)出(chu)現多算(suan)或冒(mao)算(suan)的問題，影響(xiang)(xiang)工(gong)(gong)(gong)程(cheng)預決(jue)(jue)算(suan)的準(zhun)確(que)(que)性(xing)(xing)(xing)。
5、工(gong)(gong)程(cheng)量的重(zhong)(zhong)復(fu)計(ji)(ji)算(suan)會影(ying)響工(gong)(gong)程(cheng)預(yu)決(jue)(jue)算(suan)的準確性(xing)。在工(gong)(gong)程(cheng)預(yu)決(jue)(jue)算(suan)中，工(gong)(gong)程(cheng)量的重(zhong)(zhong)復(fu)計(ji)(ji)算(suan)必(bi)然影(ying)響工(gong)(gong)程(cheng)預(yu)決(jue)(jue)算(suan)的準確性(xing)。為什么會出現工(gong)(gong)程(cheng)量的重(zhong)(zhong)復(fu)計(ji)(ji)算(suan)現象(xiang)呢(ni)？預(yu)決(jue)(jue)算(suan)管理中制度不完(wan)善，缺(que)乏有效監督是一個(ge)重(zhong)(zhong)要(yao)原因(yin)。造價人員(yuan)專業素質和工(gong)(gong)作能(neng)力差，缺(que)乏高(gao)度的責任(ren)心，就會造成工(gong)(gong)程(cheng)量的重(zhong)(zhong)復(fu)計(ji)(ji)算(suan)或漏(lou)算(suan)。
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