Double moving average–EWMA control chart for exponentially distributed quality

A control chart is an ever-popular tool for monitoring the production process. The early detection of a process shift, if any, is the desire of the quality control personnel. In this article, an effective alternative control charting procedure has been developed for the monitoring of exponentially distributed quality characteristic using the double moving average combined with EWMA statistic. The performance of the proposed control chart is examined for different combinations of the shift constant, the EWMA smoothing parameter, the moving average span, and the target in-control average run lengths. It has been observed that the proposed control chart is more efficient in the detection of process shifts as compared to control chart suggested by Khoo and Wang for the same purpose. The proposed control chart is illustrated for practical usage with the help of a synthetic and a real dataset.     

A control chart for multivariate Poisson distribution using repetitive sampling

Control charts using repetitive group sampling have attracted a great deal of attention during the last few years. In the present article, we attempt to develop a control chart for the multivariate Poisson distribution using the repetitive group sampling scheme. In the proposed control chart, the monitoring statistic from the multivariate Poisson distribution has been used for the quick detection of the deteriorated process to avoid losses. The control coefficients have been estimated using the specified in-control average run lengths. The procedure of the proposed control chart has been explained by using the real-world example and a simulated data set. It has been observed that the proposed control chart is an efficient development for the quick detection of the nonrandom change in the manufacturing process.     

Social Protection,Gender, and Poverty: Application of Social Protection Index

Literature on social protection, inequality, and poverty suggest that social protection programs are the policy tool for the eradication of poverty and inequality. The exact targeting of beneficiaries is the most important pillar behind the success of every social protection schemes. Asian Development Bank introduced Revised Social Protection Index in 2010, which is used by several studies for the evaluation of social protection schemes. The current study estimates the revised social protection index of Pakistan for the years 2011 and 2013. During 2011, the average per capita expenditure on social protection was 5.1% of the poverty line expenditure, whereas during 2013, average per capita expenditure on social protection was 5.3% of the poverty line expenditure. The disaggregated form of social protection index indicates that the coverage of social protection programs are low in Pakistan. The expenditures on social protection programs are high for the non-poor and very low for poor. The gender-based disaggregated form of social protection index shows that women have a lower value of social protection index than do males.     

Global software development: an exploratory study of challenges of globalization,HRM practices and process improvement

The globalization of software development industry continues to experience a significant growth. The increased trend of globalization brings new challenges, increases the scope of the core functions of human resource management and impacts the dynamics of process improvement. The aim of this study is to explore the challenges of globalization and indicators of process improvement in distributed teams’ environment. This study also explores the impact of HRM practices on challenges of global software development, and, the impact of HRM practices and challenges of global software development on process improvement. The exploratory mixed method design is adapted as research methodology for this study. In this multi-method approach, study is completed in two phases. In first phase, qualitative data is collected, and analyzed to explore the study variables and their relationships in global software development environment. In second phase, quantitative data is collected, and analyzed to validate the findings of first phase. The findings of this study suggest that the challenges of global software development negatively impact the process improvement; but, effective HRM practices help to minimize the negative impact of challenges and positively impacts the process improvement in global software development environment.     

Capability indices for Birnbaum–Saunders processes applied to electronic and food industries

Process capability indices (PCIs) are tools widely used by the industries to determine the quality of their products and the performance of their manufacturing processes. Classic versions of these indices were constructed for processes whose quality characteristics have a normal distribution. In practice, many of these characteristics do not follow this distribution. In such a case, the classic PCIs must be modified to take into account the non-normality. Ignoring the effect of this non-normality can lead to misinterpretation of the process capability and ill-advised business decisions. An asymmetric non-normal model that is receiving considerable attention due to its good properties is the Birnbaum–Saunders (BS) distribution. We propose, develop, implement and apply a methodology based on PCIs for BS processes considering estimation, parametric inference, bootstrap and optimization tools. This methodology is implemented in the statistical software {\tt R}. A simulation study is conducted to evaluate its performance. Real-world case studies with applications for three data sets are carried out to illustrate its potentiality. One of these data sets was already published and is associated with the electronic industry, whereas the other two are unpublished and associated with the food industry.     

Health is Wealth: A Dynamic SUR Approach of Examining a Link Between Climate Changes and Human Health Expenditures

Social Indicators Research - Health is considered as one of the critical inputs in the production function. This study is an endeavour to identify and quantify the impact of climate change measured...     

Children’s perception of social boundaries: The intersectionality of age and social group affiliation in rural Pakistan

This study explores how children perceive social boundaries in rural Pakistan. It discusses that children develop and navigate their social relationships through their perception of social boundaries, which are shaped by kinship and sociospatial organisation in rural areas. Children's perception of social boundaries is also mediated through the intersectionality of their age and social group affiliation. An ethnographic case study of a village in Southern Punjab, Pakistan, is presented here. It uses a quantifiable photo-elicitation technique and social mapping to analyse children's everyday mobilities and intersectionality in the cultural context of rural Pakistan to illustrate their perception of social boundaries.     

Analysis of the amended Davidson model with order effect for paired comparison in the Bayesian paradigm

We commonly observe many types of paired nature of competitions in which the objects are compared by the respondents pairwise in a subjective manner. The Bayesian statistics, contrary to the classical statistics, presents a generic tool to incorporate new experimental evidence and update the existing information. These and other properties have ushered the statisticians to focus their attention on the Bayesian analysis of different paired comparison models. The present article focuses on the amended Davidson model for paired comparison in which an amendment has been introduced that accommodates the option of not distinguishing the effects of two treatments when they are compared pairwise. However, Bayesian analysis of the amended Davidson model is performed using the noninformative priors after making another small modification of incorporating the parameter of order effect factor. The joint and marginal posterior distributions of the parameters, their posterior estimates, predictive and posterior probabilities to compare the treatment parameters are obtained.     

Proper generalized neighbor designs in circular blocks

Generalized neighbor designs relax the condition of constancy on the number of times two treatments occur as neighbors in a design. In this paper, we constructed generalized neighbor designs in circular blocks of equal size. Catalogs of these designs for block size 5, 7 and 9 are also compiled. All the designs given here are binary.