Causes and effects of rework on construction projects in Gaza strip

العناوين الأخرى

أسباب و آثار إعادة الأعمال في المشاريع الإنشائية في قطاع غزة

مقدم أطروحة جامعية

Abu Zuaytir, Muhammad Mahmud Salamah

مشرف أطروحة جامعية

Anshasi, Adnan Ali

أعضاء اللجنة

al-Hallaq, Khalid Abd al-Rauf
Shihadah, Samir Muhammad

الجامعة

الجامعة الإسلامية

الكلية

كلية الهندسة

القسم الأكاديمي

قسم الهندسة المدنية

دولة الجامعة

فلسطين (قطاع غزة)

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2014

الملخص الإنجليزي

Rework occurrences in construction projects are mostly avoidable as these are mainly unnecessary efforts (people, material, time and equipment) of re-doing a process or activity that was incorrectly implemented in the first time, or was not needed actually to complete the work.

The objectives of this study were: Firstly, to investigate contracting parties awareness regarding to rework in construction projects.

Secondly, to identify causes of rework and determine their degree of occurrence and their degree of severity on the project performance (time and cost).

Thirdly, to determine the impact of rework on project performance, through four case studies.

Finally, to determine the measures for reducing the occurrence of rework in construction projects.

A quantitative (questionnaire survey) and qualitative (case studies) to collect the required data were adopted in this research.

The results of this study revealed that there was a significant awareness between contracting parties regarding rework.

On the other hand, there was a significant weakness in rework controlling.

This study clarified that ―The absence of job security‖ which relates to human-resource capability was ranked as first rework cause according to the degree of occurrence in construction projects in Gaza Strip.

The second cause was ―Emergency conditions (siege and closures)‖, which relates to materials and equipment supply.

The third cause relates to the contractor which was ―Attempts to fraud‖.

The study illustrated that ―Attempts to fraud between contractors‖, were extremely severe project performance; this rework cause was ranked firstly.

The second-ranked rework cause according to degree of severity on project performance was ―Competitive pressure / low contract value".

The survey illustrated that ―Sufficient and capable human resources‖ were the most effective measure for reducing rework.

The study revealed that ―Teamwork effectiveness‖, ―Strong qualified supervision‖, ―Continuous evaluation before and during work‖ and ―Supplier prequalification‖ were very effective measures for reducing rework.

The case studies analysis indicated that rework increased the cost of different work categories between 3% to 10% and caused delays in different work categories from 20 % to 77%.

This study recommended that it's very important to increase awareness between contracting parties regarding rework in construction projects, rework causes and its impact on performance.

It's recommended strongly that rework events should be documented and project managers should have a rework control system in their projects.

This study recommended Applying severe resistance against cheating through the project by making strict regulations and strong supervision, but it remains important to strengthen personnel internal ethics.

It is recommended to do further studies on rework such as using lean construction improvement techniques to reduce rework in construction projects

التخصصات الرئيسية

الهندسة المدنية

الموضوعات

• الإدارة
• الصناعات
• فلسطين
• قطاع غزة
• البناء
• المشاريع

عدد الصفحات

219

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-531277