نتایج جستجو برای: cusum control chart
تعداد نتایج: 1351673 فیلتر نتایج به سال:
Objective: In this study, we aimed to determine the learning curve for liver wedge resection performed as part of cytoreductive surgery in advanced ovarian malignant tumors. Materials and methods: This was a retrospective analysis 120 women diagnosed with stage IIIC cancer according International Federation Gynecology Obstetrics (FIGO) classification: 22 underwent (Group A), while 98 did not re...
Consumers make complaint about the state of home-made goods. Some consumers claim that foreign goods are high quality compared to We discovered many indigenous industries no more in existence and so this brought desire carry out research work as find whether products from our brewery industry fall within acceptance region devoid consumers’ complaint. For clarity easy handling topic, data were c...
The practical applications of integrated maintenance policies and quality for a multi-component system are more complicated, still rare, incomplete to meet the requirements Industry 4.0. Therefore, this work aims extend integration economic model optimizing control parameters by incorporating Taguchi loss function system. An optimization is developed based on preventive maintenance, corrective ...
در بسیاری از موارد، اندازه گیری واقعی واحدها با مشکلات فراوانی از قبیل صرف وقت و هزینه، به بار آمدن اثرات مخرب و کار طاقت فرسا همراه است، در حالی که رتبه بندی واحدها آسان و کم هزینه تر است. در این گونه موارد روش نمونه گیری مجموعه رتبه دار جایگزین مناسبی به جای روش نمونه گیری تصادفی ساده به نظر می رسد. در این پایان نامه ابتدا مرور مختصری بر کنترل کیفیت آماری صورت گرفته و سپس روش نمونه گیری مجموع...
OBJECTIVE The number of colonoscopies required to reach competency is not well established. The primary aim of this study was to determine the number of colonoscopies trainees need to perform to attain competency, defined by a caecal intubation rate (CIR) ≥90%. As competency depends on completion, we also investigated trainee factors that were associated with colonoscopy completion. DESIGN Th...
In this paper we consider the problem of testing for a parameter change in regression models with ARCH errors based on the residual cusum test. It is shown that the limiting distribution of the residual cusum test statistic is the sup of a Brownian bridge. Through a simulation study, it is demonstrated that the proposed test circumvents the drawbacks of Kim, Cho and Lee (2000)’s cusum test. For...
One approach to monitoring autocorrelated data consists of applying a control chart to the residuals of a time series model estimated from process observations. Recent research shows that the impact of estimation error on the run length properties of the resulting charts is not negligible. In this paper a general strategy for implementing residual-based control schemes is investigated. The desi...
Implicit in the idea of medical audit are two notions: the quantifying of medical practice in terms of treatment, procedures, outcomes, and complications; and the use of these data to exact some form of accountability. Therefore some sort of objective monitoring, or quality control, of practices or procedures is needed so that periods of suboptimal performance in relation to an agreed standard ...
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