Analysis of Factors That Constrain Work Schedule Performance in Construction Projects in Nigeria

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ABSTRACT

This study examines and analyses the salient factors that constrain work schedule performance and their contributions to the level of project time overrun in construction industries in Nigeria. The realization of project work schedule objectives is usually not achieved with certainly due to myriads of constraining factors encountered during the implementation stage of project life cycle. The survey method of research design was adopted. The primary data used in the study was captured with the instrument of research questionnaire and measured with Likert five-point scale. The methods of data analyses were the multiple regression and correlation analyses. From the analysis, both F-ratio and student t-test were used in testing the research hypotheses. The results of the analyses indicate that all the constraining factors contributed to poor performance of work schedules during project implementation. The most significant factor is the time constraint that arises due to wrong estimation, unforeseen public holidays, unpredicted whether and climatic changes etc. Other significant constraining factors are materials and machinery arising due to occasional, unavailability, cost escalations and scarcity. The study therefore recommends adoption of in-depth forecasting and scenario analysis of resources, effective project monitoring and control and proactive material management practice.

Keywords: Analysis, constrain, work schedule, performance, construction, project.

CHAPTER ONE:

INTRODUCTION

1.1 Background of the Study 1
1.2 Statement of Problems 6
1.3 Objectives of the Study 7
1.4 Research Questions 8
1.5 Statement of Research Hypotheses 8
1.6 Significance of the Study 9
1.7 Scope and Limitation of the Study 9
1.8 Organization of the Work 10

CHAPTER TWO:

LITERATURE REVIEW

2.1 Introduction 11
2.2 Project Plan in Relationship with Scheduling 11
2.3 Detailed Project Plans and Planning 16
2.4 Importance and Benefits of Work Scheduling 20
2.5 Project Word Scheduling Techniques 23
2.6 Gantt Chart or Bar Chart Method of Work Scheduling 24
2.7 Network Scheduling Techniques and Analysis 25
2.8 History of Network Scheduling Techniques 26

2.9.1 Elements of a Network 26
2.9.2 Network Scheduling Techniques 29

2.9.3 Types of Network Scheduling Techniques 30
2.9.4 Distinguishing Features of CPM/PERT 34

2.10 Scheduling Hierarchy 36
2.11 Factors Affecting Work Scheduling 38
2.12 Work Scheduling Processes 42

CHAPTER THREE:

RESEARCH METHODOLOGY

3.1 Introduction 45
3.2 Source of Data and Instrument of Data Collection 45
3.3 Research Design 46
3.4 Characteristics of Research Population 47
3.5 Sampling Design and Procedure 47
3.6 Questionnaire Design and Data Measurement

Instrument 48
3.7 Questionnaire Distribution and Administration 49
3.8 Methods of Data Analysis 51

3.8.1 Test of Significance: F-ratio Test 56
3.8.2 Test of Significance: The Student t-Test 57

3.9 Summary 58

CHAPTER FOUR:

RESULTS AND DISCUSSION

4.1 Introduction 59
4.2 Summary of Data Collected From Field Survey 59
4.3 Assessing the Level of Relationship Existing Among

the Variables Selected for Analysis 62
4.4 Results of Multiple Regression Analysis 63

4.4.1 Statistical Test of Research Hypotheses 65
4.4.2 Discussion of the Results 68

CHAPTER FIVE:

CONCLUSION AND RECOMMENDATION

5.1 Conclusion 72
5.2 Recommendations 72

References 77 Appendix 79

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Analysis of Factors That Constrain Work Schedule Performance in Construction Projects in Nigeria

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