Complexities Inherent in Mega Infrastructure: The Challenges of Accurate Estimating.

Conference paper


Seidu, R.D, Ebohon, O., Kangwa, J., Ofori, G. and Young, B. (2021). Complexities Inherent in Mega Infrastructure: The Challenges of Accurate Estimating. Proceedings of Centre for the Integrated Delivery of the Built Environment (IDoBE) on Uncertainties in the Built Environment: How can we build a resilient future in the new normal?. . LSBU, London. UK 21 - 23 Nov 2021
AuthorsSeidu, R.D, Ebohon, O., Kangwa, J., Ofori, G. and Young, B.
TypeConference paper
Abstract

The amount of risk in mega infrastructure projects (MIPs) has undoubtedly contributed to the rising costs of MIPs and delays. Whether such projects are initially underestimated cannot be determined at the planning stage. Despite this, it is claimed that before any project risks are envisaged, the initial estimate is more often or likely to have been underestimated. An issue with underestimating MIPs can lead to many unrealistic expectations. Those expectations may lead to cost overrun which must have emanated from underestimating the risk variables that should have been covered with contingencies during the estimation stage.
The purpose of this study is to explore some recent headlines surrounding Crossrail and its many failures in meeting completion deadlines, with many components of the project far from completion at the due dates. This research will be a continuous study from previous research undertaking in Cost overruns and unmet deadlines in MIPs. The research aims to examine various literature to obtain an insight into some of the challenges affecting infrastructure project estimation. This is an area which has not been particularly delve into by many researchers who have concentrate their energy on the causative factors of delays and cost overrun. The discussion will help to highlight some of the difficulties and create the awareness for estimators, cost engineers, quantity surveyors and cost advisers, of what they would need when preparing initial cost estimates.

KeywordsCost overrun, Delays, Estimation, Infrastructure, Mega Project.
Year2021
Accepted author manuscript
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Print22 Nov 2021
Publication process dates
Accepted07 Oct 2021
Deposited06 Jan 2022
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El-Abidi, K.M.A., Ofori, G., Zakaria, S.A.S., Mannan, M.A. and Abas, N.F. (2019). Identifying and Evaluating Critical Success Factors for Industrialized Building Systems Implementation: Malaysia Study. Arabian Journal for Science and Engineering. pp. 1-17. https://doi.org/10.1007/s13369-019-03941-4
Using Prefabricated Building to Address Housing Needs in Libya: A Study based on Local Expert Perspectives
El-Abidid, K.M.A., Ofori, G., Zakaria, S.A.S. and Aziz, A.R.A. (2019). Using Prefabricated Building to Address Housing Needs in Libya: A Study based on Local Expert Perspectives. Arabian Journal for Science and Engineering. pp. 1-16. https://doi.org/10.1007/s13369-019-03997-2
Exploring the perceptions of construction SMEs on appropriate supporting policies for growth and development by the Qatari government for effective participation in infrastructure procurement and delivery for the 2022 World Cup
Kangwa, J and Ebohon, O J (2019). Exploring the perceptions of construction SMEs on appropriate supporting policies for growth and development by the Qatari government for effective participation in infrastructure procurement and delivery for the 2022 World Cup. ASOCSA 12th Built Environment Conference. Durban, South Africa 05 - 07 Aug 2018 Association of Schools of Construction of Southern Africa.
Where are the Barriers to Sustainable Construction in Africa?Key Note Speech
Kangwa, J (2019). Where are the Barriers to Sustainable Construction in Africa?Key Note Speech. ASOCSA 12th Built Environment Conference. Durban, South Africa 05 - 07 Aug 2018
Construction in developing countries: need for new concepts
Ofori, G. (2019). Construction in developing countries: need for new concepts. Journal of Construction in Developing Countries. 23 (2), pp. 1-6. https://doi.org/10.21315/jcdc2018.23.2.1
Driving Construction Health and Safety Through Procurement Strategy.
Young, B., Seidu, RD, Nganga, D, Robinson, H and Ebohon, J O (2019). Driving Construction Health and Safety Through Procurement Strategy. Association of Researchers in Construction Safety, Health, and Well-being (ARCOSH). Cape Town, South Africa 03 - 04 Jun 2019
Sustainable Solutions to Dampness in Building: A Case Study of Selected Period Properties in England.
Seidu, RD, Young, B., Nemcic, D, Robinson, H and Ebohon, J O (2019). Sustainable Solutions to Dampness in Building: A Case Study of Selected Period Properties in England. Association of Researchers in Construction Safety, Health, and Well-being (ARCOSH). Cape Town, South Africa. 03 - 04 Jun 2019
Sustainable industrial development in the construction sector for urban youth employment creation
Ofori, G. (2018). Sustainable industrial development in the construction sector for urban youth employment creation. Ghana Academy of Arts and Sciences Conference on Sustainable African Cities. Ghana Academy of Arts and Sciences Auditorium, Accra, Ghana 03 - 06 Jul 2018
Impact of Sustainable Procurement on Post Disaster Reconstruction
Seidu, RD (2018). Impact of Sustainable Procurement on Post Disaster Reconstruction. Social Ecological Resilience to River Floods and Coastal Disasters Workshop. Blumenau, Brazil. 16 - 20 Jul 2018
Suitability of Anthill Soil as a Supplementary Cementitious Material
Kangwa, J, Kamau, J, Ahmed, A and Hirst, P (2018). Suitability of Anthill Soil as a Supplementary Cementitious Material. European Journal of Engineering Research and Science -EJERS. 3 (7), pp. 5-11. https://doi.org/10.24018/ejers.2018.3.7.785
Ghana’s construction industry, yesterday, today and tomorrow: towards greater professionalism
Ofori, G. (2018). Ghana’s construction industry, yesterday, today and tomorrow: towards greater professionalism. Maiden Construction Industry Lecture 2018. Accra International Conference Centre, Accra, Ghana 17 Sep 2018
Public Private Partnerships (PPP) in the Developing World: Mitigating Financiers' Risks
Owolabi, HA, Ebohon, O, Oyedele, L, Alaka, H and Ajayi, S (2018). Public Private Partnerships (PPP) in the Developing World: Mitigating Financiers' Risks. World Journal of Science, Technology and Sustainable Development. https://doi.org/10.1108/WJSTSD-05-2018-0043
Cost of Fire in Highrise Building
Seidu, RD, Robinson, H and Young, B. (2018). Cost of Fire in Highrise Building. International Conference on Professionalism and ethics in Construction. London 21 - 22 Nov 2018
A new professionalism in construction: importance of trust
Ofori, G. and Ceric, A (2018). A new professionalism in construction: importance of trust. International Conference on Professionalism and Ethics in Construction. London, UK 21 - 22 Nov 2018 https://doi.org/10.18744/CONF.2018039
Developing the construction industries in developing countries to enhance performance: the case of Ethiopia
Ofori, G. (2018). Developing the construction industries in developing countries to enhance performance: the case of Ethiopia. Seventh Ethiopian Construction Technology and Management Professionals Association (ECoTMPA) International Workshop on Recent Trends in Construction Industry. Addis Ababa, Ethiopia 26 Nov 2018
Disaster 'soft' and 'hard' laws: building resilience for displaced people in the Middle East and North Africa (mena) region.
Eltinay, N, Egbu, C, Ofori, G and Ebohon, OJ (2017). Disaster 'soft' and 'hard' laws: building resilience for displaced people in the Middle East and North Africa (mena) region. COBRA 2017. UCL: London
Influence of Rice Husk Ash Density on the workability and strength of structural concrete
Kangwa, J, Kamau, J, Ahmed, A, Hirst, P and Hyndman, F (2017). Influence of Rice Husk Ash Density on the workability and strength of structural concrete. European Journal of Engineering Research and Science. 2 (3), pp. 36-43. https://doi.org/10.24018/ejers.2017.2.3.292
Permeability of Corncob Ash, Anthill soils and Rice husk replaced concrete
Kamau, J, Ahmed, A, Hirst, P and Kangwa, J (2017). Permeability of Corncob Ash, Anthill soils and Rice husk replaced concrete. International Journal of Science, Environment and Technology. 6 (2), pp. 1299-1308.
Performance of Class F Pulverised Fuel Ash and Ground Granulated Blast Furnace Slag in Ternary Concrete Mixes
Kamau, J, Ahmed, A, Hirst, P and Kangwa, J (2017). Performance of Class F Pulverised Fuel Ash and Ground Granulated Blast Furnace Slag in Ternary Concrete Mixes. EJERS, European Journal of Engineering Research and Science. 2 (6), pp. 36-41. https://doi.org/10.24018/ejers.2017.2.6.363
Dependencies among environmental performance indicators for buildings and their implications
Dias, WPS, Chandratilake, SR and Ofori, G. (2017). Dependencies among environmental performance indicators for buildings and their implications. Building and Environment. 123, pp. 101-108. https://doi.org/10.1016/j.buildenv.2017.06.045
Framework for productivity and safety enhancement system using BIM in Singapore
Teo, ALE, Ofori, G., Tjandra, IK and Kim, H (2017). Framework for productivity and safety enhancement system using BIM in Singapore. Engineering, Construction and Architectural Management. 24 (6), pp. 1350-1371. https://doi.org/10.1108/ECAM-05-2016-0122
Strategies for Foreign Construction-Related Consultancy Firms to Improve Performance in China
Li, AS, Ling, FYY, Low, SP and Ofori, G (2016). Strategies for Foreign Construction-Related Consultancy Firms to Improve Performance in China. Journal of Management in Engineering. 32 (1), pp. 06015001-06015001. https://doi.org/10.1061/(ASCE)ME.1943-5479.0000379
Construction in India: empowering the citizenry through improved performance
Ofori, G. (2016). Construction in India: empowering the citizenry through improved performance. Global Colloquium in Recent Advancement and Effectual Researches in Engineering Science and Technology. Kottayam, India 22 - 23 Apr 2016
Construction in Developing Countries: Current imperatives and potential
Ofori, G. (2016). Construction in Developing Countries: Current imperatives and potential. Kahkonen, K and Keinanen, M (ed.) CIB World Building Congress 2016 on Intelligent Built Environment for Life. Tampere 30 May - 03 Jul 2016 Tampere Department of Civil Engineering, Construction Management and Economics, Tampere University of Technology.
Entrepreneurship and innovation sustainable built environment: a research agenda
Ofori, G. (2016). Entrepreneurship and innovation sustainable built environment: a research agenda. Sandanayake, YG, Karunasena, GI and Ramachandra, T (ed.) 5th World Construction Symposium 2016 – Greening Environment, Eco-Innovations & Entrepreneurship. Colombo 29 - 31 Jul 2016 Colombo Ceylon Institute of Building. pp. 15-26
Viability of using Corncob Ash as a Pozzolan in Concrete
Kamau, J, Ahmed, A, Hirst, P and Kangwa, J (2016). Viability of using Corncob Ash as a Pozzolan in Concrete. International Journal of Science, Environment and Technology. 5 (6), pp. 4532-4544.
Suitability of Corncob Ash as a supplementary Cementitious Material
Kamau, J, Ahmed, A, Hirst, P and Kangwa, J (2016). Suitability of Corncob Ash as a supplementary Cementitious Material. International Journal of Materials Science and Engineering. 4 (4), pp. 215-228. https://doi.org/10.17706/ijmse.2016.4.4.215-228
Design for safety: theoretical framework of the safety aspect of BIM system to determine the safety index
Teo, ALE, Ofori, G., Tjandra, IK and Kim, H (2016). Design for safety: theoretical framework of the safety aspect of BIM system to determine the safety index. Construction Economics and Building. 16 (4), pp. 1-1. https://doi.org/10.5130/AJCEB.v16i4.4873