An ABC company in Saudi Arabia awards to contractors many gas, oil, and water wells projects every year. It was noticed that the majority of these projects were completed beyond their contractual schedules. This study was performed to identify the extent and causes of delay in such projects. The files of 176 completed gas, oil, and water projects were studied to determine the extent of delay. Then, a thorough investigation of 20 files was performed to define the causes of delays, to measure their effect on projects schedules, and to identify the party responsible for the delays. It was possible to measure the extent of delay and to reveal the causes, with their roots, behind these delays. The results indicated that the causes of delays which were rooted to owners contribute more heavily to the extent of delay than those causes rooted to contractors and others. The various parties in the construction industry will benefit from the findings of this study by eliminating and/or mitigating the effects of the identified causes of delays from their current and future projects.
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