704 Journal of Engineering Sciences Assiut University Faculty of Engineering Vol. 49, No. 6 Nov. 2021 PP. 704 – 733 TYPES OF WORKS IN CONSTRUCTION PROJECTS IN TERMS OF EFFECTIVENESS WHEN APPLYING VALUE ENGINEERING IN SAUDI ARABIA Yasser M. R. Aboelmagd 1, 2 and Wael F. M. Mobarak 1,2 1 Civil Engineering Department, College of Engineering, University of Business & Technology (UBT), Jeddah, Saudi Arabia 2 Mathematical Engineering and Physics Department, Faculty of Engineering, Alexandria University, Egypt. Received 16 June 2021; Revised 14 August 2021; Accepted 17 August 2021 Abstract In construction projects, reduce the cost while keeping the level of quality is an important matter, which defined as Value Engineering (VE). The main concern of Value Engineering (VE) is to search for the most effective type of works in construction projects to save project direct cost by maximizing or keeping target quality for the studied project. It is a difficult challenge to keep a balance between maximizing project quality with corresponding its minimum cost and duration at the same time. When the value-engineering process is used, each factor affecting the cost is taken into consideration all detailed studies as a specific unified factor to determine its suitable alternatives. This Paper investigates ordering the types of works in terms of effectiveness in the cost saving using the value engineering process for construction projects in Saudi Arabia. A questionnaire has been used to obtain results of only valid samples from all 205 responses, which analyzed and discussed. This study concerned with some type of works in a correlation with the four main engineering categories: construction, mechanical, electrical, and finishing work. The results indicate the difference effect of using value engineering between these major categories of construction engineering works. Finally, the importance score index applied to appraise