A one-sided Exponential Weighted Moving Average (EWMA) control chart is introduced to monitor the fraction p of nonconforming products in high yield processes. It is designed to detect upward shifts of p screening the non-transformed geometric counts i.e. the number of conforming products between two nonconforming ones. Its algorithmic function is theoretically established and numerous performa...

In this paper, we develop a process control approach to detect linear trends in the process mean. A statistic based on the deviation between the target mean and the expected mean of the process is used in the development of the new approach. The statistic is shown to have a Chi-square distribution. The approach is described and its performance is compared with Cumulative Sum (CUSUM), Exponentia...

Computer measurement systems play an important role on process automation and Industry 4.0 implementation strategies. They can be easily integrated modern production systems, enabling real time test control of multiple product characteristics that need to monitored. If for one side the big data provided by these is asset analytics optimization, other hand, high frequency sampling, commonly used...

In statistical process control (SPC), the ratio of two normal random variables (RZ) is a valuable indicator to be taken as charting statistic. this work, we propose triple exponentially weighted moving average (TEWMA) chart for monitoring RZ. Additionally, variable sampling interval (VSI) strategy has been adopted different charts by researchers. With application strategy, VSI-TEWMA-RZ then dev...

The exponentially weighted moving average (EWMA) control chart is a popular tool used to monitor and identify slight unnatural variations in the manufacturing, industrial, service processes. In general, charts operate under assumption of normality observation attention quality feature, but it not easy maintain this practice. such situations, data random processes are correlated data, as stock p...

Airplane is a mode of transportation that has an accident risk. Aircraft accidents are recorded to occur almost every year in Indonesia. The Poisson distribution used model the number aircraft each because they have fixed time and independent. Statistical quality control applied as method monitor fatal Indonesia within limits. One carry out use chart. This study aims apply Exponentially Weighte...

Objectives: To evaluate and compare the performance of various quality control methods for nuchal translucency (NT) measurements. Methods: Fetal NT measurements performed over a oneyear period in a single center were used for the study. The retrospective quality review methods proposed by the Fetal Medicine Foundation (FMF) and the Woman & Infants Hospital of Rhode Island (WIHRI) were assessed ...

Semiconductor manufacturing industry has elevated cost in productions. Improvement of production efficiency is always an important goal for manufacturers. Run-to-run control has been widely used in batch manufacturing processes to reduce variations. Threaded exponentially weighted moving average (threaded-EWMA) run-to-run control is an important and stable control scheme. In this paper, we stud...

We characterize the commercial behavior of a group of companies in a common line of business, or network, by applying small ensembles of classifiers to a stream of records containing commercial activity information. This approach is able to effectively find a subset of classifiers that can be used to predict company labels with reasonable accuracy. Performance of the ensemble, its error rate un...

Background: This study’s aim was twofold: (i) to compare starters and non-starters on a professional soccer team in terms of variations training intensity indexes across season, calculated through total distance, sprint accelerations (Acc), decelerations (Dec) (ii) analyse the relationship between for each playing status. Methods: Nineteen players (age, 29.4 ± 4.4 years; height, 1.8 0.1 m; body...