A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
IMPACT OF VARIATION ORDERS ON PUBLIC BUILDING PROJECTS IN ADDIS ABABA, ETHIOPIA
This study investigated the impact of variation orders on public building projects in Addis Ababa inorder to take proactive measure to reduce them. The study had the following objectives, namely (1) To identify the main causes of construction variation orders in public building construction projects in Addis Ababa;(2) To assess the impact of construction variation orders on public building construction projects in Addis Ababa; and (3)To forward recommendations to effectively control and manage construction variation orders. Literature relative to the research area was comprehensively reviewed. Questionnaire survey together with case study was used to collect data on variation orders.32 questionnaires from clients, consultants and contractors were collected and a case study on six(6) public building projects in Addis Ababa were investigated and analyzed using both descriptive and inferential statistics. A ranking system using the “Mean score (MS)”method was calculated to find the most significant factor for each section. From the results it was found that design change , additional work order by the client interest, change in specification, incomplete design at the time of tender, and differing site conditions were the major causes of variation orders. The results also showed that completion schedule delay, increase in project cost and delay in payment were the major impacts of variation orders. From the findings recommended strategies to minimize variation orders were complete the drawings at tender stage, all involved parties should plan adequately before works start on site and clients should provide a clear brief of the scope of works.
IMPACT OF VARIATION ORDERS ON PUBLIC BUILDING PROJECTS IN ADDIS ABABA, ETHIOPIA
This study investigated the impact of variation orders on public building projects in Addis Ababa inorder to take proactive measure to reduce them. The study had the following objectives, namely (1) To identify the main causes of construction variation orders in public building construction projects in Addis Ababa;(2) To assess the impact of construction variation orders on public building construction projects in Addis Ababa; and (3)To forward recommendations to effectively control and manage construction variation orders. Literature relative to the research area was comprehensively reviewed. Questionnaire survey together with case study was used to collect data on variation orders.32 questionnaires from clients, consultants and contractors were collected and a case study on six(6) public building projects in Addis Ababa were investigated and analyzed using both descriptive and inferential statistics. A ranking system using the “Mean score (MS)”method was calculated to find the most significant factor for each section. From the results it was found that design change , additional work order by the client interest, change in specification, incomplete design at the time of tender, and differing site conditions were the major causes of variation orders. The results also showed that completion schedule delay, increase in project cost and delay in payment were the major impacts of variation orders. From the findings recommended strategies to minimize variation orders were complete the drawings at tender stage, all involved parties should plan adequately before works start on site and clients should provide a clear brief of the scope of works.
IMPACT OF VARIATION ORDERS ON PUBLIC BUILDING PROJECTS IN ADDIS ABABA, ETHIOPIA
TIZITA HAILEMARIAM ETAMO (author)
2017-01-01
doi:10.20372/nadre:1548506941.98
Theses
Electronic Resource
English
DDC:
690
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