Why do the design stage elemental cost plan and final tender sum differ in New Zealand

Purpose – The aim of this study is to investigate the reasons for disparity between design stage elemental cost plan and final tender sum (contract sum) in building procurement. A number of risk factors responsible for such variation were identified through case study projects from which data were extracted. Design/methodology/approach – Literature review determined the risk factors inherent in the preparation of design stage elemental cost plan. Interviews and thematic analysis identified the risk factors responsible for the disparity between design stage elemental cost plans and final tender sums. Analysis of documents obtained from the archives of study participants (consultant quantity surveyors) complemented responses from the interviews. Findings – The review revealed a number of inherent risks in the design stage elemental cost plan development. The interviews further indicated that risks have an impact on and are responsible for the deviations experienced. The assessment of these risk elements cou...

[1]  Jian-Bo Yang,et al.  Construction Risk Modelling and Assessment: Insights from a Literature Review , 2011 .

[2]  Akintola Akintoye,et al.  A survey of current cost estimating practices in the UK , 2000 .

[4]  Sherif Ali Mohtady Mohamed,et al.  Cost Estimation Practice in the Gaza Strip: A Case Study , 2015 .

[5]  Martin Skitmore,et al.  Comparative analysis of pre-bid forecasting of building prices based on Singapore data , 1999 .

[6]  Patrick X.W. Zou,et al.  Understanding the key risks in construction projects in China , 2007 .

[7]  P. Love,et al.  Auditing construction costs during building design: A case study of cost planning in action , 2004 .

[8]  Andrew D.F. Price,et al.  Modelling global risk factors affecting construction cost performance , 2003 .

[9]  Tsung-Chieh Tsai,et al.  RISK ASSESSMENT OF DESIGN-BID-BUILD AND DESIGN-BUILD BUILDING PROJECTS , 2010 .

[10]  Ajibade Ayodeji Aibinu,et al.  The accuracy of pre‐tender building cost estimates in Australia , 2008 .

[11]  Godwin Onajite Jagboro,et al.  An evaluation of the impact of risk on project cost overrun in the Nigerian construction industry , 2007 .

[12]  Srinath Perera,et al.  An evaluation of the budgetary reliability of bills of quantities , 2009 .

[13]  Akintola Akintoye,et al.  Analysis of factors influencing project cost estimating practice , 2000 .

[14]  Sanhita Chowdhury,et al.  Novel Microbial Consortium for Laboratory Scale Lead Removal from City Effluent , 2011 .

[15]  Robert Weatherup,et al.  Assessing risk impacts on the variability between tender sum and final account. , 2010 .

[16]  Sherif Ali Mohtady Mohamed,et al.  Factors affecting accuracy of cost estimation of building contracts in the Gaza Strip , 2005 .

[17]  Will Hughes,et al.  THE PRICE OF RISK IN CONSTRUCTION PROJECTS , 2006 .

[18]  Derek Osbourn,et al.  Introduction to Building , 1985 .

[19]  Xiaohua Jin,et al.  Relationship‐based determinants of building project performance in China , 2007 .

[20]  Robert L. K. Tiong,et al.  Perceptions of Singapore construction contractors on construction risk identification , 2008 .

[21]  Jurgen Marc Volm,et al.  Perceptions of owners in German construction projects: congruence with project risk theory , 2009 .

[22]  William Gibson,et al.  Working with Qualitative Data , 2009, QMiP Bulletin.

[24]  H Odeyinka,et al.  Assessing risk impacts on construction cost , 2006 .

[25]  Henry Agboola Odeyinka,et al.  An Assessment of the Accuracy of Quantity Surveyors' Preliminary Cost Estimates in Nigeria , 2003 .

[26]  N. Ankrah,et al.  Construction Cost Management: Learning from Case Studies , 2008 .

[27]  Sherif Ali Mohtady Mohamed,et al.  Factors Affecting the Accuracy of Pre-Tender Cost Estimates in the Gaza Strip , 2013 .

[28]  Olu Ogunlana,et al.  Learning from experience in design cost estimating , 1991 .

[29]  Neill Morrison,et al.  The accuracy of quantity surveyors' cost estimating , 1984 .

[30]  Martin Skitmore,et al.  The accuracy of pre-tender building price forecasts: An analysis of USA data , 2000 .

[31]  Yean Yng Ling,et al.  Improving the accuracy estimates of building of approximate projects , 2001 .