¡@For engineering and construction companies, EPCK Projects which include engineering, procurement, construction and commissioning are the most difficult and complex project type for execution, due to the facts that those projects cover all project aspects (E, P, C and K), and are involved by the most amount and variety of stakeholders, especially EPCK projects for the oil refinery and petrochemical plants, which are combined with the most engineering variables and challenges, and could not be handled without care, even for the worldwide renowned engineering companies. ¡@ ¡@The key project control targets for EPCK projects are quality management, time management, cost management and HSE management. Based on PMBOK, project management includes five Project Processes, i.e. initiating, planning, executing, controlling and closing processes. Among the five processes, planning management is the most important one. If planned well in advance, project could be executed orderly as scheduled. Project Management Knowledge Areas include integration management, scope management, time management, cost management, quality management, human resource management, communication management, risk management and procurement management plans. The integration management is the most important knowledge area, while time management and cost management equally take second place. ¡@ ¡@During the execution of EPCK Project, besides meeting the codes/regulations, specifications and standards, time management and key milestones achievement for meeting contract requirement are most challenging. ¡@ ¡@With regard to shortening the design schedule or changing the design process to meet the EPCK project targets, CTCI¡¦s R&D department had already provided some counter strategies for reaching the targets, but yet provided no solutions to the shortages of the pipe fittings and flanges encountered during pipe prefabrication stage, which every project, not only in domestic but also in overseas, needs to face with, and this issue needs to be further studied in order to find out the improving strategies, which constitute the main topics of this study. ¡@ ¡@The main target of this case study is to solve the shortages of piping fittings and flanges frequently encountered during the project construction phase. For solving this issue, through collecting the execution data of the past domestic oil refinery and petrochemical plant projects of the latest 5 years, sorting out and analyzing the data, this study found out the causes and the counter strategies to shorten total project execution time and meet contract requirements. ¡@ ¡@This case study also used the EPCK P-Project as a pilot project for implementing the new strategies, compared the results with the actual data of the past domestic oil refinery and petrochemical projects, either completed already or currently on-going, explored the differences and did the difference analysis accordingly so as to verify the study results, and hopefully these study conclusions could be used as the reference materials for business process re-engineering in the future, and help the engineering firms to accomplish the mission of sustainable operation.