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Performance Monitoring of Project Earned Value Considering Scope and Quality
Guangping Liu,Han Jiang 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.1
By analyzing the principles of the project earned value management method, we find that the performance monitoring of project earned value encounters the problem of neglecting the impacts of the project’s scope and quality on the cost and schedule deviations, which will affect the project earned value performance monitoring. This paper designed a process and method of project earned value performance monitoring considering the scope and quality, and its application is analyzed using a specific case. The results show that the scientific project schedule and cost performance results can be obtained by integrating the scope and quality into the project earned value performance monitoring system while also considering the project’s baseline changes based on the activity and critical path perspectives. Finally, the conclusions of this research are summarized and future research directions are given.
Xun Gao,Qingde Li,Wanli Cheng,Guangping Han,Lihui Xuan 한국고분자학회 2017 Macromolecular Research Vol.25 No.2
Poplar fibers were pretreated under high temperature and pressurized steam at different temperatures and pressures; they were further modified using different amounts of silane coupling agent. The obtained modified fibers were used to prepare wood fiber/high-density polyethylene (HDPE) composites by an extrusion-molding process. The effects of high temperature and pressurized steaming/silane coupling co-modification on the properties of wood fiber/HDPE composites were investigated. The results show that after the high temperature and pressurized steaming treatment, the amount of hydroxyl groups on the surface of the fibers and surface polarity of the fibers decreased, whereas the crystallinity and thermal stability significantly increased. The storage modulus and mechanical properties of the composites improved as well. The addition of silane to the steam-treated fibers further enhanced the storage modulus, loss modulus, and the mechanical properties of the composites. Moreover, when the wood fibers were only modified by adding silane and the silane content was 5%, the prepared composites showed better mechanical properties than the high temperature and pressurized steaming treatment. However, the addition of a small amount of silane to the wood fibers exposed to steam at 170 °C and 0.8 MPa provided even better results; when 2% silane was added, the composites showed the best mechanical properties.