MODELLING BUILDING CONSTRUCTION DURATIONS IN NIGERIA
Sold By: Joe Project Store | Item Type: Project Material | Report this? | Attributes: 67 pages | 1-5 chapters | Amount: ₦5,000 | 1 order. | Marked useful: 6,597 times
INSTANT PROJECT MATERIAL DOWNLOADABSTRACT
Following widespread acceptance by researchers that the effects of qualitative/managerial construction time-influencing factors need to be considered in project scope-based construction time predicting models, several multivariate models combining project scope and qualitative/managerial factors have been developed. However, it has been shown in literature that the applicability of these models is clearly limited to the regions/countries where they were developed. This study was therefore aimed at developing a multivariate construction time predicting model that will be applicable to the Nigeria construction industry. A self-administered questionnaire survey was used to source information on the quantitative (project scope) factors considered in the study as well as to assess the extent of influence of the qualitative factors on construction time. Principal component regression was used for the data analysis and model development, using SPSS 16.0 for windows. Following a non-normal distribution of errors and a low R2 value obtained when multiple linear regression analysis was first conducted, the study’s data set was double log transformed and then partitioned/reclassified to account for public and private sector projects. Three models were developed following the multiple linear regression analysis repeated after transforming and partitioning/reclassifying the study’s data set. Two of these models (the public sector model and the private sector model) had high R2 values and were found after testing and validation, to be suitable for predicting construction time, while one of the models (the all projects model) had a low R2 value and was consequently found to be unsuitable for predicting construction time. The models with high R2 values serve as a useful
tool to project managers and contractors for predicting construction time, thereby facilitating effective planning.
CHAPTER 1
INTRODUCTION
1.1 Background to the study
The importance of ensuring accuracy and reliability of construction time estimates at the tendering stage cannot be overemphasized. Accurate early estimates of construction time typically provides clients and contractors with a basis for evaluating the success of a project and the efficiency of the project organisation (Nkado, 1995). They also provide them with a basis for ascertaining logistical and cash flow implications for feasibility, budgeting, planning, monitoring and even litigation purposes (Skitmore and Ng, 2003). Furthermore, they serve as a criteria in determining the best combination when performing time-cost optimization (Que, 2002). It is therefore clear that construction time has become a vital tool used by clients and contractors to ensure the success of construction projects. This success will however, only be achieved when construction time is accurately predicted.
Construction time/periods are often calculated on the basis of the planner’s own previous experience on similar projects (Choudhury and Phatak, 2004). However, as pointed out by Skitmore and Ng (2003), the need to reduce the problem of subjectivity associated with the planner’s experience and judgement to correctly interpret project and site information and make the best possible decisions, has long resulted in the development of construction time predicting models.
The development of construction time predicting models commenced with the use of project scope factors. Project scope is a measure of project size, which can be described as construction cost, project duration, gross floor area, number of storey, building type and procurement method (Walker, 1995).
This material content is developed to serve as a GUIDE for students to conduct academic research
Find What You Want By Category:
DOWNLOAD THIS PROJECT MATERIAL NOW!
Advertise Here
For advertisement, call 08168958821
Not what you were looking for? Perform a search
What's your project topic?
Comment on Facebook:
Related Project Materials
- 1.
EVALUATING THE ROLE OF QUANTITY SURVEYORS IN SUSTAINABLE INFRASTRUCTURES DEVELOPMENT
ABSTRACT The world over, a vast number of developing countries are trying to achieve sustainable economic growth in every sector and more equitable di...More »
Item Type: Project Material | 50 pages | 13,906 engagements |
- 2.
INFLUENCE OF ESTIMATING PRACTICE ON COST PERFORMANCE OF BUILDING PROJECTS
ABSTRACT This study determined the influence of estimating practice on cost performance of building projects. The objectives were to identify the esti...More »
Item Type: Project Material | 50 pages | 10,216 engagements |
- 3.
THE EFFECT OF CONTRACT PLANNING ON CONSTRUCTION PROJECT PERFORMANCE
ABSTRACT This study examines contract planning on construction projects from clients’ perspective and its effects on performance. The objectives are...More »
Item Type: Project Material | 50 pages | 12,638 engagements |
- 4.
ASSESSMENT OF THE SURVIVAL PRACTICES OF QUANTITY SURVEYING FIRMS IN A RECESSED ECONOMY
CHAPTER ONE INTRODUCTION 1.1 Background to the study The construction industry plays an important role in a nation’s economy and its activ...More »
Item Type: Project Material | 50 pages | 10,205 engagements |
- 5.
IMPACT OF CONSTRUCTION SKILLED LABOUR SHORTAGES ON THE COMPETITIVENESS OF BUILDING SECTOR IN NIGERIA
ABSTRACT Skilled workforce is critical to the socio economic development of a country and forms the backbone of the construction industry. This study ...More »
Item Type: Project Material | 50 pages | 9,376 engagements |
- 6.
EFFECT OF NATIONAL CULTURE ON ORGANISATIONAL LEARNING: PERSPECTIVE ON QUANTITY SURVEYING FIRMS
ABSTRACT Learning remains one of the significant tools for improving performance of the construction sector. Individual quantity surveyors practicing ...More »
Item Type: Project Material | 50 pages | 7,203 engagements |