Title Page
ABSTRACT
Contents
List of Abbreviations 12
1. INTRODUCTION 13
1.1. Background 13
1.2. Problem Statement 14
1.3. Research Objectives 15
1.4. Scope 16
1.5. Significance of the Research 17
1.6. Organization of the Thesis 18
2. LITERATURE REVIEW 20
2.1. Operational Terminologies 20
2.2. Types of Delays 22
2.3. Causes of Delays 25
2.4. Causes of Cost Overrun 27
2.5. Effects of Time and Cost Overruns 29
2.6. Research Gap 30
2.7. Conceptual Framework 31
2.8. Summary of Literature 33
3. RESEARCH METHODOLOGY 36
3.1. Research Design 36
3.2. Selection of Case Studies 36
3.3. Data Source 38
3.3.1. Primary Data 38
3.3.2. Secondary Data 40
3.4. Sample Size 40
3.5. Administrations of Questionnaire 42
3.6. Data Analysis Method 43
3.6.1. Relative Importance Index Method 44
3.6.2. Estimation of the time and cost overruns 45
3.6.3. Correlation Analysis 46
3.7. Data Validity 46
4. DATA ANALYSIS AND INTERPRETATIONS 48
4.1. Introduction 48
4.2. Review of Selected Road Projects 49
4.2.1. Time overruns 54
4.2.2. Cost overruns 70
4.3. Data Analysis of Survey Questionnaire 82
4.3.1. Characteristics of the Survey Participants 82
4.4. Factors Causing Schedule Delay 84
4.4.1. Group 1: Client-related Factors 88
4.4.2. Group 2: Consultant-related Factors 89
4.4.3. Group 3: Contractor-related Factors 90
4.4.4. Group 4: External-related Factors 91
4.4.5. Comparing the Contribution of the Project Parties 92
4.5. Causes of the Cost Overruns 93
4.5.1. Group 1: Client-related Factors 96
4.5.2. Group 2: Consultant-related Factors 97
4.5.3. Group 3: Contractor-related Factors 98
4.5.4. Group 4: External-related Factors 99
4.5.5. Comparing the Contribution of Project Stakeholders 100
4.6. Relationship between Schedule Delay and Cost Overrun 101
5. DISCUSSION OF RESULTS AND MITIGATION MEASURES 103
5.1. Significant Causes of Schedule Delay 103
a) Origin of Contractors 103
b) Project Delivery Type 103
c) Project Financer Type 104
d) Moderate and Significant Schedule Delay 104
e) Overall 105
5.2. Significant Causes of Cost Overrun 114
a) Origin of Contractors 114
b) Project Delivery Type 115
c) Project Financer Type 115
d) Moderate and Significant Cost Overrun 116
e) Overall 116
6. CONCLUSION AND RECOMMENDATIONS 125
6.1. Conclusion 125
6.2. Recommendations 127
6.3. Client 127
6.4. Consultant 129
6.5. Contractor 129
6.6. Limitations of the study and suggestions for future studies 129
BIBLIOGRAPHY 131
APPENDIX - Survey Questionnaire 136
초록 149
Table 1. Summary of Causes of Delays in Construction Projects 34
Table 2. Summary of Causes of Cost Overrun in Construction Projects 34
Table 3. Distributed Questionnaires and Received Responses 43
Table 4. List of Road Projects with Time Overruns and/or Cost Overruns 51
Table 5. Summary of Causes of Time Overrun Identified in Case Studies 55
Table 6. Occurrence Rate of Causes of Time Overrun in MSD and SSD Projects 67
Table 7. Summary of Causes of Schedule Delay Rankings 69
Table 8. Summary of Causes of Cost Overrun Identified in Case Studies 70
Table 9. Occurrence Rate of Causes of Cost Overrun in HCP and LCP Projects 80
Table 10. Summary of Ranking of Cost Overrun Factors 81
Table 11. Summary of demographic characteristics of respondents 83
Table 12. The RII results and ranking of factors causing schedule delays 85
Table 13. The RII results and ranking of factors causing cost overrun 94
Table 14. Correlation analysis result of Schedule Delay and Cost Overrun 102
Figure 1. Federal budget allocation to selected sectors (in billion ETB) 14
Figure 2. Descriptions of Excusable, Non-Excusable, Compensable, and Non-Compensable Delays 23
Figure 3. Conceptual Framework 33
Figure 4. Composition of Projects with Delivery Type, Source of Finance, and Origin of Contractor 50
Figure 5. Distribution of Projects with Time and Cost Overrun 53
Figure 6. Comparison Chart of Overruns with the Average Overruns 54
Figure 7. Delay registered by Foreign and Domestic Contractors 56
Figure 8. Ranking of Factors Causing Time Overruns in Domestic Contractors Projects 57
Figure 9. Ranking of Factors Causing Time Overruns in Foreign Contractors Projects 57
Figure 10. Delay registered by DB and DBB Project Delivery Types 59
Figure 11. Ranking of Factors Causing Time Overruns in DBB Projects 59
Figure 12. Ranking of Factors Causing Time Overruns in DB Projects 60
Figure 13. Delay registered by MDB and GOE Financed Projects 61
Figure 14. Ranking of Factors Causing Time Overruns in MDB-Financed Projects 62
Figure 15. Ranking of Factors Causing Time Overruns in GOE-Financed Projects 62
Figure 16. Classification of MSD and SSD Projects 63
Figure 17. Ranking the Factors Causing Delay under MSD Projects in Case Studies 65
Figure 18. Ranking the Factors Causing Delay under SSD Projects in Case Studies 66
Figure 19. Ranking the Factors Causing Time Overruns in Case Studies 68
Figure 20. Cost overruns registered by Foreign and Domestic Contractors 71
Figure 21. Ranking of Factors Causing Cost Overruns in Domestic Contractors Projects 72
Figure 22. Ranking of Factors Causing Cost Overruns in Foreign Contractors Projects 72
Figure 23. Cost overruns registered under DBB and DB Delivery 73
Figure 24. Ranking of Factors Causing Cost Overruns in DBB Projects 74
Figure 25. Ranking of Factors Causing Cost Overruns in DB Projects 74
Figure 26. Cost overruns registered under GOE and MDB Financed Projects 75
Figure 27. Ranking of Factors Causing Cost Overruns in MDB-Financed Projects 76
Figure 28. Ranking of Factors Causing Time Overruns in GOE-Financed Projects 76
Figure 29. Classification of HCP and LCP Projects 77
Figure 30. Ranking of Factors Causing Cost Overrun under MCO Projects in the Case Studies 78
Figure 31. Ranking of Factors Causing Cost Overrun under SCO Projects in the Case Studies 79
Figure 32. Ranking the Factors Causing Cost Overruns in Case Studies 81
Figure 33. Overall Ranking of Delay Factors 88
Figure 34. Ranking of Client-related Delay Factors 89
Figure 35. Ranking of Consultant-related Delay Factors 90
Figure 36. Ranking of Contractor-related Delay Factors 91
Figure 37. Ranking of External-related Delay Factors 92
Figure 38. Ranking the contribution of project stakeholders on schedule delays 93
Figure 39. Overall Ranking of Cost Overrun Factors 96
Figure 40. Ranking of Client-related Cost Overrun Factors 97
Figure 41. Ranking of Consultant-related Cost Overrun Factors 98
Figure 42. Ranking of Contractor-related Cost Overrun Factors 99
Figure 43. Ranking of External-related Cost Overrun Factors 100
Figure 44. Ranking the contribution of project stakeholders on cost overrun 101
Figure 45. Relationship between Schedule Delay and Cost Overrun 102