Shewhart首先使用six sigma来衡量产品质量。 6 sigma : 每百万样本只有3.4个错误 (正确率99.99966%) 5 sigma: 每百万样本有233个错误 (正确率 99.7%). 上下两者相差68倍。 Sigma等级计算,即“正确率”。到达99.99966%就是6 Sigma。 如果做一件事的正确率是99.5%,也只能达到可怜的Sigma 4 - 4.1水平 正确率(...
Lean Six Sigma (LSS)Failure factorsTOPSIS SIMOS approachPurpose - Many projects focus on the reliable operation of the activities in the project. Any failure in the process activities leads to major problems resulting in waste, defects, equipment damage, which has a direct impact on the consumers...
A review of Lean Six Sigma (LSS) literature highlights two main issues: first, failures are extensively reported in LSS implementation; second, LSS, which is a knowledge-intensive performance improvement methodology building upon the use of data and scientific methods, is itself disconnected from ...
Repairs.Lean Six Sigma can reduce the number of repairs during construction projects. For example, in the construction and connection of pipeline sections, welded connections can deteriorate, causing connection failures. By implementing Lean Six Sigma training, welders can learn how to avoid connection ...
Astrong infrastructure moves Lean Six Sigma from collateral to “busi-ness as usual.” The failures of previous programs to stick and deliversustained benefits are a strong paradigm that must be broken. Forexample, at a recent meeting with one company, they explained thatthey only had four ...
In such a condition, the practitioner needs to know that the project never fails due to the CFFs and TOPSIS SIMOS approach can prevent the LSS project failures. Originality/value - The study applied TOPSIS SIMOS approach to rank the CFFs in an LSS project, which is first of its kind and...
In a similar way, Lean and Six Sigma are like two sides to the same coin where both sides should be used in balance with each other to improve the chance of finding the "hidden treasure" in the business - OK, maybe not the ark of the covenant, but it could still lead to the disco...
What is Six Sigma:Six Sigma focuses on reducing variability, thereby improving product/process quality. Variability stems from failures, setups, long infrequent disruptions, synchronization requirements, and many others. Variability causes congestion (i.e., WIP/cycle time inflation), propagates through...
Used if MTBF is defined as the time between failures. See also MTBF and MTTR. MTTR (Mean Time to Repair): The average time after a breakdown of a process until the process is up and running again. Usually, the underlying statistical distributed is right-tailed, meaning that you will have...
In 2006, the DMPK team struggled to clear backlogs when failures arose due to the demands placed on it. Through the Lean Sigma project it was argued that we should aim to avoid the spikes in demand seen in early 2006. It was agreed that where possible, these milestones should be staggered...