【作者】 李悦；

【导师】 施亮星； 张召才；

【作者基本信息】 天津大学 ， 工程管理， 2022， 硕士

【摘要】 近年来,食品质量安全事件成为了公众日益关注的话题。第三方食品检测实验室作为国家食品安全抽检的数据出具方,承担着为公众把关食品安全的重任。出具的数据准确性高即较高水平的实验室系统能力成为了检测机构的核心竞争力。本文以L食品实验室作为研究对象,基于实验室现有客户投诉情况,旨在建立有效的质量问题分析方法,进而找出检测系统内存在的问题并进行改进研究。分析方法的建立基于故障树分析法(FTA)与失效模式及其效应分析(FMEA)理论。采用二者相结合的方式,首先,通过FTA进行定性分析,将客户投诉作为顶事件进行系统分析,找到底事件作为高风险点;而后,将FTA找到的高风险点作为失效模式进行FMEA。FMEA作为定量分析,根据风险优先数等判断依据确认失效模式优先顺序。将优先程度较高的失效模式通过FTA进行原因分析,为后续改善优化提供依据。最后通过测量系统分析对改进后的检测系统进行重复性与再现性的验证;对优先度较高的失效模式进行改善后的FMEA,综合两者结果,确认检测系统改进的有效性。本文中FTA确定了客户投诉事件与各失效模式的因果关系;FMEA有效找到了检测过程的关键质量控制点。通过FTA与FMEA相结合的方法,准确找到了L食品实验室因检测系统能力不足导致数据不准确进而客户投诉的根本原因,确定了日常质量控制工作的切入点。通过科学的分析方法及针对性的改进策略,提高了数据准确性,解决了L实验室检测系统能力不足、客户投诉居高不下且找不到发生原因的问题。为第三方检验检测行业分析检测质量问题、提升检测系统能力提供了一定参考。更多还原

【Abstract】 In recent years,it has been an increasing public concern about food quality and safety.A large portion of the responsibility for ensuring food safety falls onto the third-party food testing laboratories that have access to and provide the sampling data.According to the current situation of the industry,improving the capability of the laboratory system,which therefore improves the quality of test data,becomes the core competitiveness in this industry.This thesis takes L food laboratory as the research object,regarding the current customer complaints in the laboratory,and conducts research seeking the existing problems in the whole testing system that lead to customer complaints,to improve the system.The analysis combines the method of fault tree analysis(FTA)and failure mode and effects analysis(FMEA).First,the fault tree analysis method is used for qualitative analysis,systematically analyzing the customer complaints to find the bottom event as the high-risk point.Then,with the high-risk point found by FTA as failure modes,using FMEA for quantitative analysis.The priority order of failure modes was determined based on facts and criteria such as risk priority number.The failure modes with higher priority are used as key quality control points.Then analyze the causes of key quality control points through FTA,to improve and optimize the testing system.Finally,improve the testing process around the key control points,and analyze the reproducibility and reconciliation of the testing process via MSA.The failure modes with higher priority after improvement are analyzed by FMEA again.Combine the consequences of MSA and FMEA to confirm the result of the improvement.FTA is focused on determining the connection between customer complaint events and each failure mode.FMEA effectively found critical quality control points in the testing process.Through the combination of FTA and FMEA,it identified the major cause of customer complaints was the inaccuracy of data from the L food laboratory testing system and that pointed out an aspect for improving daily quality control work.Through the scientific method of analysis and the improvement strategies aimed at the cause of the problem,L food laboratory has improved the testing system’s sufficiency and lowered customer complaints.It provides some reference for the third-party inspection and testing industry to analyze and detect quality problems and improve the ability of measurement systems.更多还原