Modelling of unexpected shift in SPC

Optimal statistical process control (SPC) requires models of both in-control and out-of-control process states. Whereas a normal distribution is the generally accepted model for the in-control state, there is a doubt as to the existence of reliable models for out-of-control cases. Various process models, available in the literature, for discrete manufacturing systems (parts industry) can be treated as bounded discrete-space Markov chains, completely characterized by the original in-control state and a transition matrix for shifts to an out-of-control state. The present work extends these models by using a continuous-state Markov chain, incorporating non-random corrective actions. These actions are to be realized according to the SPC technique and should substantially affect the model. The developed stochastic model yields a Laplace distribution of a process mean. An alternative approach, based on the Information theory, also results in a Laplace distribution. Real-data tests confirm the applicability of a Laplace distribution for the parts industry and show that the distribution parameter is mainly controlled by the SPC sample size.     

Information for more effective strategic planning

This paper illustrates how an entity—called a ‘strategic data base’ (SDB)—can be developed to provide important information in a form which makes it directly useful in various phases of a strategic planning process. The strategic data bases are concise statements of the organizational and environmental situations which define the organization's most salient problems, opportunities, and constraints. These SDBs may be developed through a participative process involving tasks forces which are made up of managers representing the diverse interests of the organization. The strategic data bases thereby become important informational inputs to planning which can directly serve to enhance the quality of planning decisions. Moreover, the process of developing SDBs can be an important learning device for those middle managers who can become involved in such a process at a much earlier point in their career than that at which they might normally engage substantively in the organization's overall strategic choice process.     

Correlates of satisfaction with performance appraisal feedback

The relative lack of research on employees’ reactions to performance appraisal feedback is the primary impetus for this study which advances this important, but neglected, research area by investigating potential predictors and consequences of satisfaction with appraisal feedback. Survey responses from 112 employees were matched with their performance ratings from two different appraisal periods to test specific hypotheses. Results indicate that satisfaction with rater and previous performance ratings influence employees’ satisfaction with appraisal feedback. Satisfaction with appraisal feedback was positively related to job satisfaction and organizational commitment and negatively related to turnover intentions. Supervisory status moderated the relationship between satisfaction with appraisal feedback and subsequent performance such that the relationship existed only for supervisory employees who, in addition to receiving feedback about their own performance, also provided feedback to their subordinates. Implications of results for researchers and practitioners are discussed.     

Jackknifing the Mantel–Haenszel Estimator in Sparse Contingency Tables

This article investigates the performance of two jackknife techniques under an asymptotic model in which the number of 2 × 2 tables increases but the possible marginal configurations remain fixed. These approaches are applied to the Mantel–Haenszel estimator, or transformed versions of this estimator, respectively. The resulting jackknife estimators are shown to be consistent for the common odds ratio. Their asymptotic distributions are derived; they can be used for constructing appropriate sparse-data confidence intervals.     

Reflections on a 30-Year Career of Research on Work and Personality by Melvin Kohn and Colleagues

Sociological Forum -     

Common Coding of Observation and Execution of Action in 9‐Month‐Old Infants

Do 9‐month‐old infants motorically simulate actions they perceive others perform? Two experiments tested whether action observation, like overt reaching, is sufficient to elicit the Piagetian A‐not‐B error. Infants recovered a toy hidden at location A or observed an experimenter recover the toy. After the toy was hidden at location B, infants in both conditions perseverated in reaching to A, demonstrating that active search by the infant is not necessary for the A‐not‐B error. Consistent with prior research, infants displayed an ipsilateral bias when reaching, the so‐called mysterious midline barrier. A similar ipsilateral bias was also observed depending on the manner in which the experimenter reached; infants perseverated following observation of ipsi‐ but not contralateral reaches by the experimenter. Thus, infants perseverated only following observation of actions they themselves were able to perform, suggesting that they coded others' actions in terms of motor simulation.     

Housing policy in Nigeria: towards enablement of private housing development

One of the continuing challenges posed by unprecedented urbanization in the developing countries is the provision of adequate housing. Over the last three decades, Nigeria, like several developing countries, has emphasised public housing schemes, but with little success. This coincides with global paradigm shift from direct public provision of housing to the enablement of private shelter initiatives and housing production. The paper discusses private housing development features and dynamics and the factors affecting the sector in the country. It argues for the creation of an enabling environment, including support of housing initiatives and investments by householders, small-scale providers, and entrepreneurial private firms. The paper identifies the implications of enabling strategy for housing finance, access to land, residential infrastructure, institutional regulations and building materials and related industry particularly in the light of the need for the private sector to play greater roles in housing. It draws from aspects of empirical study by the authors and some review of housing policy-related issues.