Multi criteria FMECA for coal-fired thermal power plants using COPRAS-G
Multi criteria FMECA for coal-fired thermal power plants using COPRAS-G
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DOI：
10.1108/ijqrm-04-2013-0068
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发表时间：
2014-01-01
影响因子：
2.5
通讯作者：
Mitra, Souren
中科院分区：
文献类型：
--
作者：
Das Adhikary, Debasis;Bose, Goutam;Mitra, Souren
目的 - 本文的目的是使用不确定数据，替代传统的风险优先数估计方法，提出燃煤火力发电厂的多准则故障模式影响和严重性分析。设计/方法/途径 - 灰色复数比例评估 (COPRAS-G) 方法，一种多准则决策工具，用于评估故障模式（替代方案）的严重性。在该模型中，针对每种替代方案的标准（临界因子）以灰数而不是明确值表示。研究结果 - 由于腐蚀导致的省煤器直管 (ECO) 的破裂故障是最高的临界故障模式，而由于焊接缺陷导致的 ECO 短管的破裂故障是最低的临界故障模式。 原创性/价值 - 本文将人为和环境因素作为附加因素，这些因素也会对故障模式产生显着影响。针对该问题对COPRAS-G方法进行了修改。不同维护人员针对每种故障模式的关键因素评分的不确定性以灰色数字表示。
Purpose - The purpose of this paper is to present a multi criterion failure mode effect and criticality analysis for coal-fired thermal power plants using uncertain data as well as substituting the traditional risk priority number estimation method.Design/methodology/approach - Grey-complex proportional assessment (COPRAS-G) method, a multi criteria decision making tool is applied to evaluate the criticalities of the failure modes (alternatives). In this model the criteria (criticality factor) against each alternative are expressed in grey number instead of crisp values.Findings - Rupture failure of the straight tube of economizer (ECO) due to erosion is the highest critical failure mode whereas rupture failure of the stub of ECO due to welding defect is the lowest critical failure mode.Originality/value - This paper incorporates human and environmental factors as additional factors which also influence the failure modes significantly. The COPRAS-G method is modified according this problem. Uncertainty in the scoring of criticality factors against each failure mode by various maintenance personnel is expressed in grey numbers.