Modelling activity times by hybrid synthetic method

Uncertain (manual) activity times impact a number of manufacturing system modules: plant and layout design, capacity analysis, operator assignment, process planning, scheduling and simulation. Direct observation cannot be used for non-existent production lines. A hybrid direct observation/synthetic method derived from Method Time Measurement available in industry is proposed. To determine accurate activity times required by heuristics and metaheuristics optimisation, manufacturing system modules are modelled by MILP and operator efficiency parameters are used for time standardisation. Among human factors considered are skill and ergonomics. Application to the sterilisation of reusable medical devices is extensively described. Experimental data taken from observation on the field and a worst-case date have shown the model direct applicability for professionals also to non-manufacturing cases.     

Multiversity of the twenty-first century – examining opportunities for integrating community engagement in planning curricula

Abstract

This paper examines student-community engagement activity in planning. This is a subset of university–community engagement, and is a point of overlap between such engagement and planning education. Community engagement activity enables students to learn in situ practical skills within live projects, while community partners may benefit from technical knowhow, and labour input. Based on a UK-wide survey and three in-depth case studies, the paper explores the pedagogical designs underpinning community engagement activities involving students, as well as the various capacities in which the different participants – students, instructors and community members – act. The analysis reveals considerable diversity in approaches. An alignment of student engagement activities in the planning curriculum with emerging transformative co-learning models of university-community engagement could offer novel opportunities for the discipline of planning and their impact on communities as well as the fields standing in today’s multiversities.     

Trend effects on perceived avalanche hazard

Hazard-level forecasts constitute an important risk mitigation tool to reduce loss of economic values and human life. Avalanche forecasts represent an example of this. As for many other domains, avalanche risk is communicated using a color-coded, categorical risk scale aimed at informing the public about past, current, and future risk. We report the results from three experiments in which we tested if an irrelevant past trend in forecasted avalanche danger affects perceptions of current and future avalanche risk. Our sample consisted of individuals from three different populations targeted by national avalanche warning services. All three experiments showed that the perception of avalanche risk is influenced by the trend, but that the effect is opposite for perceptions of current and expectations of future avalanche risk. While future avalanche risk is extrapolated in the same direction as the change from the previous day, we found that perceived current risk appears to be based on an average of past and current risk. These effects diminish when we provide participants with a scale indicating the exact level of avalanche danger. For most of our measurement instruments, however, the effects remain significant. These results imply that targeted populations may consider historic information more than was intended by the sender. As such, our results have implications for both avalanche warning services and risk communication in general.     

Games Played Through Agents

We introduce a game of complete information with multiple principals and multiple common agents. Each agent makes a decision that can affect the payoffs of all principals. Each principal offers monetary transfers to each agent conditional on the action taken by the agent. We characterize pure‐strategy equilibria and we provide conditions—in terms of game balancedness—for the existence of an equilibrium with an efficient outcome. Games played through agents display a type of strategic inefficiency that is absent when either there is a unique principal or there is a unique agent.     

Indicators for European Union Policies. Business as Usual?

This paper looks at the role of statistics-based knowledge in the making of EU policy. We highlight shortcomings in the use of statistical indicators made in the course of the Lisbon strategy, ended in 2010. In our opinion the shortcomings are: (i) The paradox of the coexistence within the same European Commission of two holistic frameworks: the Structural Indicators and the Sustainable Development Indicators. One does not understand which of these two systems is taken to measure the overall policy performance of the European Union. (ii) A communication issue whereby the Lisbon strategy and its offspring EU 2020 are not communicated (Lisbon is to the average citizen the capital of Portugal) and are especially not communicated in relation to existing statistical indicators of good quality, against the opinion of academicians that transparency and accountability based on sound statistics favour democracy and participation. We illustrate the reasons that lead us to see these points as problematic and offer suggestions on how these should be tackled in line with the practices developed in the Open Method of Coordination. The danger is that in the absence of a debate on the issue, these shortcomings be perpetuated in the EU 2020 strategy.     

The British Docks: A Test of Alternative Models of Wage and Employment Determination

In this paper we compare two well-known models of union bargaining: labour demand and efficient bargains. We use data on the British docks which belonged to the national Dock Labour Board, abolished in 1989. The docks industry is particularly well-suited for a test of the competing models: in fact it had a long tradition of union bargaining on manning levels and, at the same time, it experienced a long-run decline in employment. Also, jobless dockers were granted some form of unemployment compensation. The institutional features of the industry allow to test a strong version of the efficient bargain model, where the union equates the utility of those who work and those who do not. Our evidence supports the strong efficiency hypothesis: employment depends only on the opportunity cost of working. The secular decline in employment in the industry is explained mainly by technological progress, i.e. the introduction of containers.     

Trust in Islamic Business-to-Business Relationships: Evidence from Indonesia

We examine the role of trust within Islamic culture in business-to-business relationships by exploring the link between credit officers’ trust in business customers and their financing decisions. In line with our framework, which is based on the fact that Islamic culture is characterized by a collectivistic approach and clan-based social structure, we find that value-based trust is more important than competence-based trust in explaining business relationships. The results support the argument that Islamic culture business relationships are grounded more on the principles, values and norms that a partner brings to the relationship than on business skills. Our results are robust to endogeneity and multilevel issues.     

Rural tourism and livelihood strategies in Romania

Substantial changes in the Romanian countryside accompanied by the need for more robust economic activities have caused some families to turn to tourism as an economic diversification strategy. A qualitative study of selected rural tourism entrepreneurs indicates positive experiences, both economically and in other aspects of their lives. However, the development of rural tourism is highly uneven spatially and the Romanian Government should act more incisively to support families establishing guesthouses.     

Positive and negative effects of external influences on program design

Program fidelity to initial design is a critical measure in implementation research and often considered an important element of program success. This approach assumes that a program's initial design is immune to the influence of external forces and is based entirely on sound evidence, theory, and practice. Using a permanent supportive housing program for domestic violence victims as a case study, this research examines how external influences may affect program theory and design and evaluates whether such influences are perceived as opportunities or barriers by program administrators. Findings, based on document review, stakeholder interviews, and focus groups, reveal that funding and physical site characteristics, and to a lesser degree, community support and professional standards, were important external influences. Both opportunities and barriers affected program design, but these effects differed in timing and degree.