Using Lean Six Sigma to improve mobile order fulfilment process in a telecom service sector

This study proposes and follows a specific and systematic framework for implementing Lean Six Sigma (LSS) methodology in a telecom company in order to improve customer satisfaction by minimizing the company’s response time to customer requirements. The goal of this study was achieved by utilizing several LSS tools under five phases of the DMAIC methodology. Unlike previous studies in the telecom sector that used only qualitative method, in this study, both qualitative and quantitative methods were utilized to draw meaningful conclusions. As a result of the implementation of the LSS methodology, the average order fulfilment lead time for sales orders (SO) and value-added service (VAS) orders was reduced from 10.3 to 5.9 days and from 1.5 to 0.5 days, respectively. The reduction in lead time resulted in an increase in the sigma level for SO and VAS orders from 0.44 to 1.26 and from 0.73 to 2.66, respectively. These improvements were expected to lead to a financial benefit in savings of over $600,000 per year in operational costs, enhancements to customer experience and an increase in revenue generating opportunities. Moreover, this article enriches the existing literature on the application of LSS concept in the service industry, and helps the company to speed up the response to customer requirements.     

THE RELATIONSHIP BETWEEN DEBT LEVEL AND FISCAL SUSTAINABILITY IN ORGANIZATION FOR ECONOMIC COOPERATION AND DEVELOPMENT COUNTRIES

In this article we unify the traditional approaches to testing for fiscal sustainability considering the stock‐flow system that fiscal variables configure. Our approach encompasses previous ways of testing for sustainability. The results obtained for a group of 17 Organization for Economic Cooperation and Development (OECD) countries point to weak fiscal sustainability, as well as to the existence of cointegration between deficit and debt, confirming the relevance of the stock‐flow approach. Allowing for structural breaks and multicointegration turns out to be of critical importance to assess whether the fiscal authorities apply their policies looking for sustainability and whether, simultaneously, they try to stabilize real debt target levels. (JEL H62, E62, C22)     

Evaluating the effect of a campus-wide social norms marketing intervention on alcohol-use perceptions,consumption, and blackouts

Objective: To evaluate the effect of a campus-wide social norms marketing intervention on alcohol-use perceptions, consumption, and blackouts at a large, urban, public university. Participants: 4,172 college students (1,208 freshmen, 1,159 sophomores, 953 juniors, and 852 seniors) who completed surveys in Spring 2015 for the Spit for Science Study, a longitudinal study of students' substance use and emotional health. Methods: Participants were e-mailed an online survey that queried campaign readership, perception of peer alcohol use, alcohol consumption, frequency of consumption, and frequency of blackouts. Associations between variables were evaluated using path analysis. Results: We found that campaign readership was associated with more accurate perceptions of peer alcohol use, which, in turn, was associated with self-reported lower number of drinks per sitting and experiencing fewer blackouts. Conclusions: This evaluation supports the use of social norms marketing as a population-level intervention to correct alcohol-use misperceptions and reduce blackouts.     

Generalized Laplacian Distributions and Autoregressive Processes

Generalized Laplacian distribution is considered. A new distribution called geometric generalized Laplacian distribution is introduced and its properties are studied. First- and higher-order autoregressive processes with these stationary marginal distributions are developed and studied. Simulation studies are conducted and trajectories of the process are obtained for selected values of the parameters. Various areas of application of these models are discussed.     

Differences in wage determination in the Eurozone: A challenge to the resilience of the common currency

Different developments in wages and unit labor costs across countries can reduce the synchronization of business cycles within a currency area and therefore be a potential source of asymmetric shocks and/or asymmetric response to a common shock. In this paper, we use novel econometric methods to identify differences and similarities in wage determination across Eurozone countries. Results show that wages have different determinants across euro area countries, among which two relatively distinct groups can be identified. In particular, wages in Germany, Austria, Belgium, Luxembourg, the Netherlands and Finland behave more similarly, are less sticky and respond more to macroeconomic conditions than those in the group composed of Italy, Spain, Portugal, France and Ireland. Moreover, the equilibrium wage has been affected by a structural change contemporaneous to the international financial crisis. Finally, structural reforms since the euro crisis have contributed to make labor market structures in Eurozone countries more similar, which contributed to improve the resilience of the Eurozone, but the job is not completed yet.     

Infants’ Biological Sensitivity to the Effects of Maternal Social Support: Evidence Among Mexican American Families

The identification of infants who are most susceptible to both negative and positive social environments is critical for understanding early behavioral development. This study longitudinally assessed the interactive effects of infant vagal tone (respiratory sinus arrhythmia; RSA) and maternal social support on behavioral problems and competence among 322 low‐income Mexican American mother–infant dyads (infants: 54.1% female) and explored sex differences. Infant RSA was calculated from resting HR data at 6 weeks of age. Mothers reported on general social support, partner support, and family support at 6 months, and infant behavioral problems and competence at 1 year. Two‐way interactions (RSA × support source) were evaluated to predict behavioral problems and competence, adjusting for covariates. Results indicated higher competence among infants with lower RSA whose mothers reported higher general support or higher partner support. Interactive effects on behavior problems of RSA with maternal partner or family support were only found for female infants: Girls with higher RSA showed more behavior problems when mothers reported low support, but fewer problem levels in the context of high support. Our results suggest that infant RSA is an important moderator of the effects of the early social environment on early development.     

The Trajectory of Concurrent Motor and Vocal Behaviors Over the Transition to Crawling in Infancy

To document the trajectory of motor and vocal behaviors in real and developmental time, we observed infants at each of four biweekly naturalistic play sessions over the transition to crawling. An exhaustive and mutually exclusive coding scheme documented all vocalizations and postures. Odds ratios of the likelihood of a given posture‐vocalization dyad revealed that vocalization and crawling were significantly unlikely to co‐occur at the session marking the onset of crawling. We speculate that infants’ allocation of attention over the transition to crawling prompted behavioral trade‐offs. During mastery of a novel skill, infants may have had difficulty allocating attention to multiple tasks, but with experience, a decrease in attentional load for the new skill allowed performance of simultaneous behaviors in other domains to occur.     

Fighting for survival: The experiences of lesbian,gay, bisexual,transgender, and questioning students in religious colleges and universities

ABSTRACT

Little is known about the experiences of lesbian, gay, bisexual, transgender, and questioning (LGBTQ) students attending religious colleges and universities. This study used grounded theory to analyze the narratives (N = 271) of LGBTQ former and current students. The central theme described by LGBTQ students was a fight for survival with five subthemes: (a) institutionalized homo/transphobia (strict school policies, enforcement of heterosexuality and gender conformity through discipline, conversion therapy); (b) a culture of fear (fear of exposure, homophobic panic and code words, seeking cover); (c) marginalization and isolation; (d) struggle (suffering and suicide, reconciling faith and LGBTQ identity); and (e) coping and resilience (surviving through critical thinking and strategic activism). Implications for practice are provided.     

Strategy for a statistical analysis of odour influence on the mammalian olfactory bulb responsiveness

This paper proposes a global strategy for statistical analysis of odour influence on the responsiveness of the mammalian olfactory bulb, the first relay of the olfactory pathway. Experiments were performed on 86 mitral cells recorded in 17 anaesthetized freely breathing rats. Five pure odours and their binary mixture were used. The spontaneous activity and odour-evoked responses of the cells were characterized by their temporal distribution of activity along the respiratory cycle, i.e. by cycle-triggered histograms. Several statistical analyses were performed to describe the influence of binary odour mixtures and, especially, to detect a possible dominance of one component of the mixture.     

A case study on a generalist service delivery model for street children in Durban,South Africa: Insights from the capability approach

This paper adopts a qualitative case study on the generalist service delivery model of I‐Care, a Durban‐based non‐governmental organization that works with male street children. Fifteen face‐to‐face interviews were conducted with 10 I‐Care employees and 5 former street children. A focus group was set up with I‐Care employees. Although existing literature is forthright about a generalist approach for children at risk, it remains unclear how to implement this approach in practice. This paper reviews a continuity of 5 fundamental social work practices for working with street children: (a) outreach work, (b) child–family and child–community mediation, (c) transitory care centres and programmes, (d) brokerage, and (e) mentorship and follow‐ups. The study analyses how these practices contribute to the capability and agency expansion of the street children and outlines challenges that service providers and former street children experience. The main challenges acknowledged are balancing between the agency and protection of street children and the adaptation of children to street life. The study proposes intervention strategies to overcome these challenges.