Unit water treatment plant di PT “X” merupakan unit pengolahan air bersih yang menyediakan, memproduksi, dan menyalurkan higiene sanitasi sebesar 300 m^3per jam kepada masyarakat. Terdapat lima karakteristik kualitas digunakan yaitu tingkat pH air, konsentrasi klorin aktif, kekeruhan (turbidity), total hardness, solid. Proses spesifikasi baku mutu merujuk pada PERMENKES RI No. 32 Tahun 2017. Da...

Research AOne-sidedMEWMAChart for HealthSurveillance Michael D. Joner Jr1,∗,†, William H. Woodall2, Marion R. Reynolds Jr3 and Ronald D. Fricker Jr4 1The Procter & Gamble Company, Mason, OH 45040, U.S.A. 2Department of Statistics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, U.S.A. 3Departments of Statistics and Forestry, Virginia Polytechnic Institute and State Un...

Economic design of multivariate exponentially weighted moving average (MEWMA) control charts for monitoring the process mean vector involves determining economically the optimum values of the three control parameters: the sample size, the sampling interval between successive samples, and the control limits or the critical region of the chart. In the economic-statistical design, constraints (inc...

One of the objectives of the research done in statistical process control is to obtain control charts that show few false alarms but, at the same time, are able to detect quickly the shifts in the distribution of the quality variables employed to monitor a productive process. In this paper the synthetic-T control chart is developed, which consists of the simultaneous use of a CRL chart and a Ho...

In this paper, we propose a new entropy-optimized bivariate empirical mode decomposition (BEMD)-based model for estimating portfolio value at risk (PVaR). It reveals and analyzes different components of the price fluctuation. These components are decomposed and distinguished by their different behavioral patterns and fluctuation range, by the BEMD model. The entropy theory has been introduced f...

Hotelling T 2 control chart not only reflects the correla-tions between different quality characteristics but also has good efficiency on monitoring multivariate in production process. A new alternative was constructed after original products data are processed by using exponentially weighted moving average for cumulating failure effects because is ineffective detecting minimal mean deviations....

The mixed control chart is proposed to improve detection performance with fewer process shifts. In this study, we the modified exponentially weighted moving average - (MMEM), a new for observing changes in mean. Average run length, standard deviation of and median length can be used examine effectiveness detecting Shewhart, Moving (MA), Modified Exponentially Weighted (MEWMA), Mixed (MMME) char...