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Bi-objective optimization and reliability analysis in unreliable M/G/1 retrial queues with rational customers, reserved idle times and setup times Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-03-18 Fan Xu, Ruiling Tian, Linmin Hu, Qi Shao
Energy consumption arising from no-loads and failures is a common and challenging problem in the design of service systems. To analyze the impact of no-load consumption and failure consumption on t...
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A temporal and spatial EWMA-based monitoring and diagnosing approach for image data Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-03-12 Ling Zuo, Panpan Zhou
With the increasing application of machine vision systems, it is crucial to monitor images of industrial products for potential anomalies in the production process. In current literature, the resea...
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Reliability-oriented product manufacturing quality improvement approach based on R-KQC and DMAIC Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-03-11 Jishan Zhang, Yihai He, Xin Zheng
Reliability-oriented product quality improvement is of great significance to assurance the fitness of quality control and management activities in the manufacturing process. A novel reliability-ori...
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The variable sample size and sampling interval run sum Max chart Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-03-06 D. L. Antzoulakos, K. G. Fountoukidis, A. C. Rakitzis
A variable sample size and sampling interval run sum Max chart (VSSI-RSMax) is proposed to efficiently monitor the mean and/or variability of a process. The VSSI-RSMax chart varies the sample size ...
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Product form solution for a queueing-inventory system with lost sales and phase type distribution of the vacation time Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-29 Dequan Yue, Yuying Zhang, Wuyi Yue
In this paper, a continuous review s,S queueing-inventory system with lost sales is investigated. Customers arrive according to a Poisson process, and each arriving customer needs exactly one item ...
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Family of Kumaraswamy generalized distribution in estimation of multi-component reliability under the adaptive hybrid progressive censoring schemes Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-24 Akram Kohansal, Carlos J. Pérez-González, Arturo J. Fernández
In this paper, the statistical inference on multi-component stress-strength parameter with non-identical-component strengths, based on Kumaraswamy generalized distribution under adaptive hybrid pro...
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Generalized multivariate EWMA control chart supplemented with bivariate ranked set techniques Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-14 Muhammad Riaz, Rashid Mehmood, Iftikhar Ali, Babar Zaman, Naveed Khan, Mona Gharib
Existing univariate exponential weighted moving average (EWMA) control charts with ranked set schemes are used for monitoring related characteristics independently. Also, existing multivariate EWMA...
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Application of Poisson state-space models and shared frailty models for multistage processes surveillance Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-12 Fatemeh Ebrahimi, Fatemeh Sogandi
There are many applications in actual multistage processes with Poisson data. Control charts are an essential tool for monitoring quality variables in multistage processes. On the other hand, it is...
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Improved shewhart-type control charts based on weak runs in multistate trials Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-12 Spiros D. Dafnis, Theodoros Perdikis, Markos V. Koutras
In this work we introduce two new classes of Shewhart-type control charts with supplementary runs rules using a three or four region partition of the observed characteristic’s range. The study of t...
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Risk adjustment-based statistical control charts with a functional covariate Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-12 Qiuyan Hu, Liu Liu
In real applications, there are situations in which quality characteristics are significantly affected by function-valued covariates such as electrocardiogram (ECG) signals; however, previous surve...
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A new method for computing the sojourn times in the MAP/M/1 queues with three types of negative customers Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-09 Heng-Li Liu, Quan-Lin Li
In this paper, we propose a new method for computing the sojourn times in the MAP/M/1 queueing systems with three types of negative customers due to three basic removal rules: the RCH, RCE and RCA....
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An integrated optimal-GICP design for the SPRT control chart with estimated process parameters based on the average number of observations to signal Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-07 J.W. Teoh, W.L. Teoh, Michael B.C. Khoo, K.P. Tran, M.H. Lee
As a variable-sample-size control scheme, the sequential probability ratio test (SPRT) chart is favoured due to its sensitivity and high sampling efficiency. It is frequently documented that the SP...
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Determining optimal process means in a multi-stage production system with inspection errors in 100% inspection Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-05 Ahmet Kolus, Salih Duffuaa
The problem of determining optimal process parameters for multiple processes has not been widely addressed in the literature. Another important consideration that is frequently overlooked is the pr...
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Change-point design-based charting schemes for monitoring process variability Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-02-01 Mengjie Tang, Dan Wang
Most of the recommended nonparametric control charts apply to monitor location parameter. In this paper, we propose a nonparametric exponentially weighted moving average (EWMA) control chart for mo...
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An adaptive EWMA chart for Poisson process Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-01-19 Zakia Batool, Abdul Haq
This paper introduces an adaptive EWMA (AEWMA) chart designed for monitoring Poisson processes. This chart offers a streamlined implementation process, eliminating the need for additional parameter...
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Self-starting monitoring of the progressive type II censoring data based on goodness-of-fit test Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2024-01-07 Wei Zhao, Jiao Yu, Chunjie Wu
Censoring is a common occurrence in life testing and reliability analysis, primarily due to constraints such as time and cost. In this paper, we construct control charts using goodness-of-fit test ...
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Inference for a general family of exponentiated distributions under ranked set sampling with partially observed complementary competing risks data Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-12-29 Liang Wang, Yuhlong Lio, Yogesh Mani Tripathi, Tzong-Ru Tsai
Ranked set sampling (RSS) acts as an efficient way for collecting failure information due to its ability of saving testing time and cost, and this paper discusses statistical inference for compleme...
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Reliability evaluation for time-based stochastic manufacturing networks with time-dependent reliability Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-11-20 Ping-Chen Chang, Cheng-Fu Huang, Lance Fiondella
This study aims to evaluate the system reliability for a time-based stochastic manufacturing network (TSMN). The architecture of a TSMN includes arcs and nodes where each node is an inspection stat...
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Binary decision diagram-based reliability modeling of phased-mission manufacturing system processing multi-type products Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-11-24 Yongwei Ke, Xin Wang, Zhenggeng Ye, Shuai Zhang, Zhiqiang Cai
The development of science and technology drives phased-mission manufacturing systems to be increasingly complex, which poses significant challenges to system reliability analysis. Although it has ...
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A lamp location problem based on system reliability Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-11-20 Zilong Feng, Ruiyou Zhang, Won Young Yun
This paper studies one- and two-dimensional lamp location problems considering system reliability. Within the system, several identical lamps are used to cover the system service area, and each lam...
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Simultaneous monitoring of multivariate time between events and their magnitude using multivariate marked Hawkes point process Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-11-09 Mohammadreza Mirzaei Novin, Amirhossein Amiri
In this paper, monitoring the time between events is discussed. The control chart of the time between events in multivariate mode discusses the conditions under which the Hawkes point process gener...
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Optimum test condition setting and sample allocation for accelerated degradation tests under the last-exit-time failure mode Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-10-17 Junchao Dong, Xiaobing Ma, Han Wang, Yujie Liu, Yu Zhao
Accelerated degradation tests (ADTs) have been widely adopted for products whose failure is defined as the first-passage-time (FPT) when the degradation path crosses a given threshold. However, for...
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An equivalence between multivariate cumulative sum control charts Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-29 Nesma A. Saleh, Mahmoud A. Mahmoud, William H. Woodall
We show that an auxiliary information based (AIB) cumulative sum (CUSUM) chart is equivalent to a special case of the multivariate CUSUM control chart proposed by J. D. Healy. Due to this equivalen...
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Correction Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-23
Published in Quality Technology & Quantitative Management (Ahead of Print, 2023)
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Deviance residual-based Shewhart control chart for monitoring Conway-Maxwell-Poisson profile under the r-k class estimator Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-22 Ulduz Mammadova, M.Revan Özkale
In this study, we first propose the r-k class estimator in COM-Poisson regression, and then we introduce the Shewhart control chart using the deviance residuals obtained from the r-k class estimato...
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A hybrid maintenance policy for a protection system under internal degradation and shocks: a case study in a steel industry Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-16 Augusto José da Silva Rodrigues, Flávia Ataide da Motta, Cristiano Alexandre Virginio Cavalcante, Alexandre Ramalho Alberti
Protection systems are designed so that they can prevent disasters when critical events (demands) occur. These systems are usually inactive and their functionality is only noticeable during a deman...
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Analysis of strategic customer behavior in observable M/G/1 queues with impatience Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-20 Jingchuan Zhang, Zaiming Liu, Gang Chen
In this paper, we propose a queueing-game-theoretic model and analyze the strategic behavior of customers and social optimization in an observable M/G/1 queue, in which arriving customers decide wh...
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The design of two-sided S2-chart with estimated in-control process variance based on conditional median run length Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-16 Nirpeksh Kumar, Sonam Jaiswal
ABSTRACT Monitoring both decrease and increase in the process variance has a significant value in effectively implementing any quality improvement program. This paper considers the Phase II two-sided S2S2 -chart with estimated in-control (IC) process variance and evaluates its performance under the conditional perspective. The conditional perspective focuses on the conditional (given parameter estimates)
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An adaptive EWMA mean chart in the presence of outliers Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-14 Abdul Haq
Occasional outliers that might be a natural part of a process may distort the properties of a control chart. In this paper, we show that a recently proposed adaptive EWMA (AE) mean chart is highly ...
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A new phase II change-point detection based EWMA chart for monitoring and diagnostics of linear profiles Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-06 Longcheen Huwang, Arthur B. Yeh, Yi-Wen Wang
ABSTRACT A new Phase II control chart, which is based on the change-point model and combined with the exponentially weighted moving average (EWMA) mechanism, is proposed to monitor general linear profiles. The new control chart can be used to monitor general linear profiles when the true in-control parameters are unknown, and only a few historical data are available. In addition, when the chart triggers
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Optimal design for reliability improvement experiments with a non-constant scale parameter Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-09-04 Guodong Wang, Xiaoyang Li, Guanqi Fang, Zhen He, Geoff Vining
ABSTRACT Traditionally, when planning reliability improvement experiments, the orthogonal design with equal sample allocation has been the typical choice. However, it is often found that both the scale parameter and the shape parameter of lifetime distributions vary across experimental factors, rendering the conventional approach unsuitable for such scenarios. In this article, we introduce a new approach
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A re-evaluation of repetitive sampling techniques in statistical process monitoring Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-08-21 Nesma A. Saleh, Mahmoud A. Mahmoud, William H. Woodall
ABSTRACT In this article, we review the literature on the use of the repetitive sampling technique with quality control charts. We raise some important concerns and questions regarding its application and underlying assumptions. We show that a fixed sample size method that requires on average the same amount of sampling can be designed to have as good or better statistical properties when monitoring
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The effect of information on the strategic behavior in a Markovian queue with catastrophes and working vacations Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-08-11 Yilin Wang, Jinting Wang, George Zhang
ABSTRACT A stochastic clearing system is studied from a game-theoretic perspective in the paper where the server is subject to a Poisson-generated catastrophe and a follow-up repair process. Whenever a fatal shock (catastrophe) occurs, all customers are cleared from the system and the server fails. A repair is rendered immediately to fix the server with an exponential repair time. During the repair
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An EWMA chart for high dimensional process with multi-class out-of-control information via random forest learning Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-08-07 Mingze Sun, Lei Qian, Amitava Mukherjee, Dongdong Xiang
ABSTRACT Modern manufacturing and quality monitoring involve multi-class out-of-control (OOC) information from the training sample. It is essential to use such information during online monitoring of data streams from complex processes. In this paper, a monitoring framework is designed by combining the random forest technique with the exponentially weighted moving average method for monitoring complex
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Step stress accelerated reliability growth test method with latent failures Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-07-28 Hao Xing, Jun Yang
ABSTRACT The reliability growth test (RGT) is a popular method to improve system reliability, but it can be time-consuming to implement in practice. So, the accelerated reliability growth test (ARGT) is developed. Since the immature design, the newly designed system is easily exposed to latent failures, which are more and more difficult to find with the increase of improvements. In addition, the constant
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On reliability assessment of weighted k-out-of-n systems with multiple types of components Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-07-24 Kinan Hamdan, Majid Asadi, Mahdi Tavangar
ABSTRACT This paper studies the reliability function of a weighted kk -out-of- nn system with multiple types of components. A weighted system with MM different types of components is considered and two real-life scenarios for the operation of the system are defined. In the first one, it is assumed that the system operates if the accumulated weight of all active components is more than a predetermined
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State-based transition probabilities for systems subject to periodic inspection interval Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-07-19 Mani Sharifi, Sharareh Taghipour, Arash Zaretalab
ABSTRACT In this paper, we present a general formula to calculate transition probabilities for six different types of systems based on their redundancy strategy and the status of the components. The systems are under periodic inspection policy and their components are repairable. The investigated systems include system I – active redundancy without any component to be replaced or repaired; system II
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On the design and performance of upper one-sided Shewhart charts for zero-inflated Poisson processes with estimated parameters Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-07-13 Eftychia Mamzeridou, Αthanasios Rakitzis
ABSTRACT In this work we study the performance of the upper one-sided Shewhart-type control charts for monitoring a zero-inflated Poisson process, in the case of estimated process parameters. In practice, the process parameters are unknown and must be estimated from a Phase I dataset. However, this affects the theoretical performance of a control chart and further investigation is needed to assess
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Machine repair system with threshold recovery policy, unreliable servers and phase repairs Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-07-06 Kamlesh Kumar, Madhu Jain, Chandra Shekhar
ABSTRACT This study aims to discuss queueing modeling of machine repair problems under threshold recovery policy (Q), server unreliability and k-type phase repairs. When one or more machines in the system fails/fail, the service facility (or all RR -servers) is activated and repairs the failed machine according to the first come, first served (FCFS) discipline. The service facility may experience a
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Estimation and prediction of modified progressive hybrid censored data from inverted exponentiated Rayleigh distribution Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-06-07 Liang Wang, Shuo-Jye Wu, Yogesh Mani Tripathi, Sanku Dey
ABSTRACT In this paper, statistical inference of an inverted exponentiated Rayleigh model is studied when the failure times are obtained under a modified progressive hybrid censoring. The maximum likelihood estimators of the model parameters together with associated existence and uniqueness are established, and approximate confidence intervals are constructed based on asymptotic theory. Alternatively
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Estimation for partially observed left truncation and right censored competing risks data from a generalized inverted exponential distribution with illustrations Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-06-05 Liang Wang, Chunfang Zhang, Shuo-Jye Wu, Sanku Dey, Yuhlong Lio
ABSTRACT In this paper, studies of competing risks model are considered when the observations are left-truncated and right-censored data. When the failure times of the competing risks are distributed by a generalized inverted exponential model with same scale but different shape parameters with partially observed failure causes, statistical inference for the unknown model parameters is discussed from
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Optimal strategy analysis of a Markovian queue with variable vacation and vacation interruptions under unobservable cases Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-06-04 Yitong Zhang, Xiuli Xu, Mingxin Liu
ABSTRACT This paper makes a game-theoretic analysis of an M/M/1 queue with variable vacation and vacation interruptions. The Nash equilibrium mixed strategy and social utility maximization are derived based on a non-cooperative game theory and an optimization theory under different information precision levels, namely almost unobservable and fully unobservable cases. The explicit solutions of the entrance
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Residual Lifetime of Repairable Systems and Phase type Approximation Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-06-04 Sareh Goli, Safieh Mahmoodi
ABSTRACT This paper considers a repairable system whose periods of operations and repairs alternate during the run time. The residual lifetime of the system and its age, when the system operates at time tt , are proposed, and their properties are investigated. Under the condition that the system is under repair, the remaining time until the end of system repair time and the elapsed time of a repair
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Nonparametric likelihood ratio-based EWMA control chart Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-05-30 Wen Zhong, Liu Liu, Wu Fan
ABSTRACT Nonparametric control charts are among the most important tools of statistical process control. Such charts are useful when there is a lack of knowledge about an underlying distribution or its parameters. Most existing nonparametric control charts are used for monitoring location parameters: they may perform poorly when the scale parameters change arbitrarily over time. In this paper, we propose
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Bayesian multivariate control charts for multivariate profiles monitoring Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-05-27 Ahmad Ahmadi Yazdi, Mahdi Shafiee Kamalabad, Daniel L. Oberski, Marco Grzegorczyk
In many topical applications, the product’s quality can be well described in terms of statistical regression relationships between one or more response and a set of explanatory variables. In the li...
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Queueing system with server breakdowns and individual customer abandonment Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-05-22 A.N. Dudin, S.R. Chakravarthy, S.A. Dudin, O.S. Dudina
ABSTRACT We consider a single server queueing system with a finite capacity buffer in which the server is subject to breakdowns and repairs. At the time of a breakdown, the customers, if any, present in the system will either decide to stay or abandon according to a probabilistic mechanism. This decision is made by every customer present in the system independent of the others. We assume that the arrivals
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Determination of optimal warranty length for smart wearable device considering customer complaint Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-05-21 Jyh-Wen Ho
This study investigates optimal warranty length for a new type of smart wearable device to maximize manufacturer’s profit in a competitive market. Most studies explore optimal warranty length based...
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Reliability modeling: combining self-healing characteristics and dynamic failure thresholds Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-04-28 Anqi Shangguan, Guo Xie, Lingxia Mu, Rong Fei, Xinhong Hei
The failure threshold of a product is not always constant when affected by random shocks. Thus, this paper establishes a reliability model that combines dynamic failure threshold and self-healing c...
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Process capability monitoring and change-point analysis for S-type quality characteristic Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-28 Mou-Yuan Liao, Chien-Wei Wu
Among various quality assurance activities, process capability indices (PCIs) are recognized as the most effective tools to quantify and evaluate process performance. The one-sided capability index...
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An analytical approach of Markov modulated Poisson input with feedback queue and repeated service under N-policy with setup time Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-27 Snigdha Mahanta, Nitin Kumar, Gautam Choudhury
In this paper, we analyze an MMPP/G1G2/1 queue with general server setup time under N-policy based on the case that the arrival rates vary according to the server’s status and a customer can repeat...
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A robust bathtub-shaped failure time model for a two-component system with applications to complete and censored reliability data Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-27 Badamasi Abba, Hong Wang, Mustapha Muhammad, Hassan S. Bakouch
This article proposes a flexible additive model that adequately describes complex reliability and survival data. The proposed methodology, referred to as the flexible exponential power-Gompertz (FE...
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Control charts for monitoring relative risk rate in the presence of Weibull competing risks with censored and masked data Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-26 Adel Ahmadi Nadi, Robab Afshari, Bahram Sadeghpour Gildeh
Competing risks data frequently appear in real-world operations like quality inspections, survival analysis, reliability tests, and clinical trials. From the quality point of view, relative risk ra...
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Warranty cost analysis for products protected by Lemon Laws Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-26 B.P Iskandar, U.S Pasaribu, R Wangsaputra, A Cakravastia, H Husniah
ABSTRACT This paper deals with warranty cost analysis for a warranted product protected by lemon laws during the warranty period. The product is declared a lemon if either of two conditions are met: (i) the product has been returned to the dealer k (e.g. k = 4) times to have the failed product fixed, and the manufacturer was unable to repair the problem satisfactorily, or (ii) the product has been
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A maximum dual CUSUM chart for joint monitoring of process mean and variance Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-23 Abdul Haq, Qamar Ali
A dual chart provides more sensitivity than the conventional chart when it is known that a shift size varies within a given interval. In this paper, we propose a maximum dual CUSUM (MDC) chart for ...
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A new Spk-based sample-size tightening sampling system for lot determination Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-21 Shih-Wen Liu, Zih-Huei Wang
ABSTRACT This article presents a new Spk-based sample-size tightening sampling system by variables inspection for lot determination when the quality characteristic has bilateral specification limits. The proposed system has a flexible switching mechanism between normal and tightened inspection, which is adaptively employed for the occurrence of quality deterioration in submitted lots. The performances
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Multi-chart schemes for detecting a range of variance changes Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-19 Gideon Mensah Engmann, Dong Han, Muhammad Ali Raza
This article considers how CUmulative SUM (CUSUM) and Exponentially Weighted Moving Average (EWMA) multi-charts were used to monitor the variance (variability). Multi-chart schemes are a combinatio...
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Modeling left-truncated degradation data using random drift-diffusion Wiener processes Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-03-15 Bingxin Yan, Han Wang, Xiaobing Ma
For products whose performance characteristic (PC) gradually degrades with time, one usually observes its degradation levels repeatedly to predict its remaining useful life (RUL). Due to the limite...
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Inference for reliability in a multicomponent stress–strength model for a unit inverse Weibull distribution under type-II censoring Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-02-27 Kundan Singh, Amulya Kumar Mahto, Yogesh Tripathi, Liang Wang
In this paper, a unit inverse Weibull distribution as well as its basic structural properties is proposed. Furthermore, classical inferences for multicomponent reliability are discussed under type-...
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Reliability estimation of a consecutive k-out-of-n system for non-identical strength components with applications to wind speed data Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-02-25 Duygu Demiray, Fatih Kızılaslan
In the stress-strength reliability literature, although identical components assumption may not be realistic due to the structure of a system, independent and identically distributed components hav...
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Variable sample size and sampling interval (VSSI) and variable parameters (VP) run sum charts for the coefficient of variation Qual. Technol. Quant. Manag. (IF 2.8) Pub Date : 2023-02-20 Wai Chung Yeong, Yen Yoon Tan, Sok Li Lim, Khai Wah Khaw, Michael Boon Chong Khoo
This paper improves the sensitivity of the existing run sum chart for shifts in the coefficient of variation γ by proposing two types of adaptive schemes, i.e. the variable sample size and sampling...