Application of FMEA in emergency generators construction issues discussed prevention

• Main Authors: Li-Change Hu, 胡力強
• Other Authors: Luh-Maan Chang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/65784922591229626888

碩士 === 國立臺灣大學 === 土木工程學研究所 === 101 === Emergency generators are important building facilities, with backup capabilities and disaster prevention function as the power redundant system. If the construction accidentally causes power outages, the important equipments cannot function and the specific “instant” may even cost human life. Therefore, the study investigated how to maintain the stable emergency generators operation and enhance the quality of construction. By using Failure Mode and Effects Analysis (FMEA), the study include: (1) Establish the systematic problem analysis methods to investigate the potential problems during the emergency generator construction phase.(2) Generate the FMEA analysis table to assess the emergency generator construction safety and consequently reduce the construction issues for future control and prevention. The questionnaire is created to assure the objectivity of the study. The target interviewees of this survey include construction companies, design companies, and professional manufacturers; all of which are specialized in mechanical and electrical systems. It’s emphasized on four phases (site access, construction drawing review, construction inspection, and operation system test) and 73 construction tasks within four phases in finding potential failure modes, factors and quantitative assessment methods. Then, it is used to evaluate the risks associated with the calculated values, sort the risk priority number and propose improvement measures. Hopefully, it may provide engineers with proactive prevention assessment, avoid the construction issues affecting the followed operation test, stabilize the operation system, improve construction quality, and eventually reach the ultimate goal- stabilize buildings redundant power system. In summary, the study findings include: (1) Four phases of construction operations failure risk assessment: Severity (S): The operation system test phase is the most important. The risk is the highest with the breakdown system. Therefore, the operating procedures must be reviewed thoroughly. Occurrence (O): The problems are most frequently occurred during construction drawing review phase. It’s needed to pay special attention to construction shop drawing. Detection (D): The operation system test phase is complex and highly specialized. It should be focus on education and training in this phase. Risk Priority Number (RPN): The RPN of the Operation system test is the highest. The second highest is the construction inspection phase. (2) Risk assessment: Severity (S): The risk level of construction is moderate to high. Occurrence (O): The occurrence of the construction issues is low, which means that emergency generators problem has been reduced in general. Detection (D): Most of the responses show that they are experienced in construction tasks and have certain degree of knowledge. (3) By systematic FMEA method, the guideline of the emergency generator construction including standard operating procedure and implementation procedures in four phases is created for electrical engineering staff. (4) Based on the expert interviews and the questionnaire, FMEA is used to investigate 73 tasks, develop Failure Modes and Effects Analysis, calculate RPN value and propose the improvement measures. (5) Failure Modes and Effects Analysis (FMEA) can be used as a construction assessment tool in response to a variety of different building conditions or construction experience. FMEA can also be used as a method to evaluate the construction risk for mechanical and electrical system. Besides, it can also be used as the basis for construction management to reduce the potential construction problems in critical tasks.