Managing testing activities in telecommunications: A case study

This paper examines ways of managing testing more efficiently and effectively. The importance and the workload of testing have been growing constantly in the telecommunication industry, as a result of shorter product lifecycles and decreased time-to-market. At the same time, the complexity of products has increased with a decrease in physical dimensions. Managers face enormous challenges in developing knowledge and effective testing processes. This case study proposes the application of two models, a testing optimization model and an extended V2M2 (Verification Validation Maturity Model) model, for managing the value of testing. In the empirical part of the study, the present state of testing management is examined.     

RFM customer analysis for product-oriented services and service business development: an interventionist case study of two machinery manufacturers

Journal of Management and Governance - This study examines how original equipment manufacturers (OEMs) can segment their product-oriented services customers with the help of a recency, frequency,...     

Testing Prospect Theory in a Deterministic Multiple Criteria Decision-Making Environment*

Prospect theory by Kahneman and Tversky [7] is tested in a deterministic multiple criteria decision-making context. In two experiments conducted in classroom settings subjects made pairwise preference comparisons of condominiums for sale. The results of the experiments indicate that the traditional value model did not explain the subjects' revealed preferences as well as the prospect model. We conclude that prospect theory is a reasonable model of choice for many individuals in such a context.     

Dimensions of Social Stratification and Their Relation to Mortality: A Comparison Across Gender and Life Course Periods in Finland

Social Indicators Research - Differences in mortality between groups with different socioeconomic positions (SEP) are well-established, but the relative contribution of different SEP measures is...     

Children’s educational attainment,occupation, and income and their parents’ mortality

Using data from Finland, this paper contributes to a small but growing body of research regarding adult children's education, occupation, and income and their parents' mortality at ages 50+ in 1970–2007. Higher levels of children's education are associated with 30–36 per cent lower parental mortality at ages 50–75, controlling for parents' education, occupation, and income. This association is fully mediated by children's occupation and income, except for cancer mortality. Having at least one child educated in healthcare is associated with 11–16 per cent lower all-cause mortality at ages 50–75, an association that is largely driven by mortality from cardiovascular diseases. Children's higher white-collar occupation and higher income is associated with 39–46 per cent lower mortality in the fully adjusted models. At ages 75+, these associations are much smaller overall and children's schooling remains more strongly associated with mortality than children's occupation or income.     

Number of children and later-life mortality among Finns born 1938–50

We investigated the association between number of offspring and later-life mortality of Finnish men and women born 1938–50, and whether the association was explained by living conditions in own childhood and adulthood, chronic conditions, fertility timing, and unobserved characteristics common to siblings. We used a longitudinal 1950 census sample to estimate mortality at ages 50–72. Relative to parents of two children, all-cause mortality is highest among childless men and women, and elevated among those with one child, independently of observed confounders. Fixed-effect models, which control for unobserved characteristics shared by siblings, clearly support these findings among men. Cardiovascular mortality is higher among men with no, one, or at least four children than among those with two. Living conditions in adulthood contribute to the association between the number of children and mortality to a greater extent than childhood background, and chronic conditions contribute to the excess mortality of the childless.     

Classification of difference matrices over cyclic groups

The existence of difference matrices over small cyclic groups is investigated in this computer-aided work. The maximum values of the parameters for which difference matrices exist as well as the number of inequivalent difference matrices in each case is determined up to the computational limit. Several new difference matrices have been found in this manner. The maximum number of rows is 9 for an r ×15 difference matrix over Z₃, 8 for an r ×15 difference matrix over Z₅, and 6 for an r ×12 difference matrix over Z₆; the number of inequivalent matrices with these parameters is 5, 2, and 7, respectively.     

Educational Differences in Completed Fertility: A Behavioral Genetic Study of Finnish Male and Female Twins

Despite the large body of research on educational differences in fertility, how genetic and environmental influences may contribute to educational differences in completed fertility is not well understood. This study examines the association between educational level and completed fertility in a sample of Finnish male and female twins born between 1950 and 1957 with register-based fertility follow-up until 2009. The results show that poorly educated men and highly educated women are least likely to have any children and have lower completed fertility in general. Behavioral genetics analysis suggests that the association between education and having any children in both sexes is influenced by factors shared by co-twins and that these factors are genetic rather than common environmental. No evidence of a causal pathway between education and having any children independent of these shared influences is found. These findings suggest that familial factors may play a role in the process through which educational differences in completed fertility are formed.     

Self-Reported Fears as Indicators of Young Children’s Well-Being in Societal Change: A Cross-Cultural Perspective

Our main interest in this paper is in studying children’s well-being by using children themselves as informants and fear as an indicator of insecurity from cross-cultural and longitudinal perspectives. More specifically our paper documents the changes in the content and prevalence of children’s fears in two neighboring countries, Finland and Estonia, during the last decade. The study was carried out in 1993 and replicated in 2002/2003 in both countries with the random samples of total number of 420 five to six-year-old children (in Estonia 115 in 1993 and 91 in 2002; in Finland 105 and 109, respectively). For both countries the decade in question was a period of social, political and economic transition including post-socialist transformation in Estonia. Especially informationalization and globalization had a profound impact on the everyday life of parents and children. The increase of insecurity among children in both countries was expected. Children’s fears were investigated by means of an individual semi-structured and picture-aided interview. The most important findings are: the prevalence of children’s self-reported fears has generally increased during the ten years, especially among the Estonian children. The most significant increase was observed in both countries in fears of imagination-related things including television-related fears, fears of imagined creatures and of nightmares parallel to children’s increased media-exposure in daily life. Despite the increase of␣general welfare in both countries our results suggest the opposite tendency among young children; decrease of safety and increase of insecurity. The level of children’s insecurity was higher in Estonian than in Finland at both times. It is noteworthy that some fears of young children are ‚universal’ (fear of getting lost, fear of darkness, fear of being alone), while some fears are more context dependent (television-induced fears, fear of strange people). Young children proved to be competent informants of their condition and well able to provide essential and invaluable information about their problems and well-being. An erratum to this article can be found at