Browsing Department of Mechanical Engineering & the Built Environment by Subjects
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Modelling in ranking procedures: A case study of infrastructure failures in NigeriaThe lack of a scientific approach as to which factors are considered or chosen in a decision-making process can seriously influence the effectiveness of that process. Using the example of infrastructure failures in Nigeria, this paper presents a severity index in matrix order (SIMO) model that unambiguously ranks factors and also defines a threshold that demarcates between major variable factors that should not be compromised in policy and less important ones. Infrastructures failures in Nigeria have hindered economic processes which were meant to alleviate poverty. Constraints responsible for this situation are identified from a carefully conducted survey in Nigeria. Severity of these constraints is empirically ranked using a developed severity index in matrix order (SIMO) model. However, the investigation reveals that corruption, misallocation of investments, inadequate maintenance, lack of transparency and accountability, insufficient funding for infrastructure, lack of supportive institutions, inconsistent political, social and economic policies and the lack of suitable technical and managerial skill are the major variable factors responsible for infrastructure failures in Nigeria.
Polycentric cultural framework for infrastructure procurement in NigeriaThe high failure rate of most infrastructures in sub-Saharan Africa is alarming, particularly in Nigeria, where the dearth and deterioration of infrastructure constantly imposes severe constraints on economic growth and development. Consequently, existing institutions or strategies which are designed to reproduce effective infrastructures in areas that lack them have been mostly unsuccessful. A carefully conducted survey covering the six geopolitical zones in Nigeria identified inadequate maintenance and inconsistent procurement strategies as the major factors responsible for unsustainable infrastructure delivery. In view of the fact that a stable infrastructure is an essential prerequisite for sustainable development, this paper presents a polycentric cultural framework for infrastructure maintenance and procurement in Nigeria, a framework which emphasises the integration of infrastructure users throughout the process, from conceptualization to actual delivery of infrastructure, by taking the recipients’ culture, beliefs and values into account. It also emphasises the use of systemic referendum amongst users and stakeholders via the traditional consultative processes before the actual delivery of infrastructure and services.
The private versus public infrastructure in Sub-Saharan Africa: An empirical validationThe macroeconomics of the relationship between the private and public infrastructure in sub-Saharan Africa has been very unpredictable due to the region’s ineffective planning and policy formulation for infrastructure and service delivery. This paper examines the relationship between public and private infrastructure in subSaharan Africa. It also demonstrates that sub-Saharan Africa consumes more and invests less when compared to the industrialised world and that the present domestic investments in sub-Saharan Africa are actually more in the hands of the private sector. Lastly, an inference relationship for measuring and comparing economic stability between countries and regions was formulated, with the industrialised countries as a reference value.