Designing distribution centres for agile supply chains

Increasing globalisation and market volatility represent major challenges for many supply chains, and particularly for the distribution centres within them. This paper examines how distribution centres are being designed to be agile even though they are, by their nature, long-term fixed assets. The research is based on semi-structured interviews with warehouse design companies to identify the range of agility types that were regarded as necessary during the design phase, and how these were addressed. The research also explores the cost, time and service level implications, whilst handling variances in demand or supply. The interviewee responses are expressed in terms of qualitative measures on Likert scales. The results indicate that there is generally a slightly or moderately higher cost to design for agility. Based on the literature and the case study responses, a methodology is developed of how to address agility within warehouse design, and areas of further research are identified

The impact of economic and supply chain trends on British warehousing

Purpose: Warehouses are key nodes in many supply chains and typically represent over 20% of logistics costs. However, other than property market studies, there has been relatively little research on warehousing, particularly as regards how trends in warehouses may relate to changes in such parameters as wider economic and supply chain factors. The purpose of this paper is to examine this area in order to explore how trends in warehousing may relate to existing warehousing and supply chain theory so as to facilitate further research into the relationship between warehousing and "smarter" logistics strategies and efficient supply chain performance. Research approach: The paper is based on a longitudinal study examining the take-up (i.e. occupation) of new large warehouses in Great Britain over the past 16 years covering some 700 records. For the purposes of this study, large warehouses are classified as those over 100,000 square feet (9,290 square metres) in area. These trends, together with those of total warehouse stock, are then related to national statistics, warehouse surveys, supply chain changes and other relevant data over that period. Findings and Originality: This is a rare longitudinal study of this subject. It is found that, until the recent recession, the total warehouse stock, as well as the take-up of large warehouses, has been increasing and this can be associated with such factors as economic growth, retail spending and globalisation. Both the footprint and height of large warehouses has been rising and this may be due to such factors as network economies and warehouse technology. The locations of warehouses are becoming more dispersed, possibly due to the growth in e-commerce and port-centric logistics. In addition, it was found that large warehouses have been increasingly taken up by retailers and manufacturers rather than logistics companies. Research impact: This paper examines the possible influence of economic and supply chain trends on warehousing in Great Britain. As well as testing existing theories, the data provides a sound foundation for future research. For example, there have been conflicting evidence in previous research regarding economies and diseconomies of scale and this discussion can now be set against trends in warehouse footprint and height. Practical impact: The paper provides a better understanding and basis for decision making by planners, developers, funding corporations, operators and end users. For example, topics such as size and height of buildings are examined, as well as trends in port-centric logistics, rail connections and e-fulfilment. The changing nature of warehouse designs in terms of wider economic and supply chain trends is particularly important for practitioners as warehousing costs are to a large extent determined at the design phase and have a major impact on the effectiveness of the overall supply chain of which they are a part

A pilot evaluation of positive behavioural support workshops for families of adults with intellectual disabilities who present challenging behaviour: 'It should have been offered years ago'

Background: Positive behavioural support (PBS) workshops were designed for families supporting their adult son or daughter with an intellectual disability engaging in challenging behaviours. This was in recognition of the impact of their challenging behaviour, in particular the level of stress carers often experience and positive reports from other studies incorporating multi-family learning. Method and materials: Two sets of pilot workshops were completed, incorporating modules in PBS and physical interventions. Workshops included presentations and self-directed/group learning tasks, recorded in a specifically designed workbook. Results: Quantitative data was analysed using non-parametric tests. Positive results were found for changes in various areas including self-reported stress levels. Positive trends were also found in pre and post application of the Aberrant Behaviour Checklist (Aman and Singh, 1994). Conclusions: This study showed very encouraging results in regard to the impact of this model of training for the carers involved. Further research is required to assess any longer term effects, and to explore the impact on larger numbers of participants

A national UK survey of peripatetic support teams for children and adults with intellectual and developmental disability who display challenging behaviour

Background: The service provision model of peripatetic support teams for people with intellectual disabilities who present challenging behaviour has been well established in the United Kingdom, with a small but growing evidence base. The current context in the UK would appear to indicate an ever-increasing role for such teams, in order to support people in their own communities and reduce the reliance on out-of-area placements. This study sought to establish the current position of such teams within the UK. Method and materials: 46 teams were given the opportunity to complete an online questionnaire regarding the team's day to day functioning. Results: 20 services responded to the survey providing a range of data. The results suggested that the services were mainly targeted towards adults, had a range of working practices and therapeutic orientations, with broadly successful outcomes (albeit self reported). The data would also suggest that this type of provision had diminished in recent years. Conclusions: The implications of the survey are discussed within the context of the current policy in the UK. In particular, the lack of provision for children, the use of evidence based practice and what appears to be a diminishing resource just at the time when it is most needed are explored

Predicting the Output From a Stochastic Computer Model When a Deterministic Approximation is Available

The analysis of computer models can be aided by the construction of surrogate models, or emulators, that statistically model the numerical computer model. Increasingly, computer models are becoming stochastic, yielding different outputs each time they are run, even if the same input values are used. Stochastic computer models are more difficult to analyse and more difficult to emulate - often requiring substantially more computer model runs to fit. We present a method of using deterministic approximations of the computer model to better construct an emulator. The method is applied to numerous toy examples, as well as an idealistic epidemiology model, and a model from the building performance field

Multi-level Visualization of Concurrent and Distributed Computation in Erlang

This paper describes a prototype visualization system for concurrent and distributed applications programmed using Erlang, providing two levels of granularity of view. Both visualizations are animated to show the dynamics of aspects of the computation. At the low level, we show the concurrent behaviour of the Erlang schedulers on a single instance of the Erlang virtual machine, which we call an Erlang node. Typically there will be one scheduler per core on a multicore system. Each scheduler maintains a run queue of processes to execute, and we visualize the migration of Erlang concurrent processes from one run queue to another as work is redistributed to fully exploit the hardware. The schedulers are shown as a graph with a circular layout. Next to each scheduler we draw a variable length bar indicating the current size of the run queue for the scheduler. At the high level, we visualize the distributed aspects of the system, showing interactions between Erlang nodes as a dynamic graph drawn with a force model. Speci?cally we show message passing between nodes as edges and lay out nodes according to their current connections. In addition, we also show the grouping of nodes into “s_groups” using an Euler diagram drawn with circles

MEASURING FOOD SAFETY PREFERENCES: IDENTIFYING CONSUMER SEGMENTS

Conjoint analysis was used to estimate individual preference functions for food safety attributes. Consumer segments were constructed by using cluster analysis to form groups which were homogeneous with respect to preferences regarding food safety. Although substantial differences existed among the three distinct groups, consumers in all segments were willing to pay a moderate amount to ensure that apples met established safety standards. However, a policy which restricts pesticide use would likely result in substantial consumer dissatisfaction, unless it could be achieved with little impact on price or quality.Food Consumption/Nutrition/Food Safety,

Development and evaluation of control performance assessment indices for Alcoa’s advanced process control applications

This report details development and evaluation of potential performance measures for Advanced Process Control (APC) applications implemented across Alcoa sites. The final measure would ideally aid in the diagnosis of poor control and enable comparison between the performances of separate controllers. In particular, the work has focused on the development of a suitable control performance index for Honeywell’s Robust Model Predictive Control Technology (RMPCT – Profit Controller) as implemented on an evaporator process located at Alcoa’s Kwinana alumina refinery. Research in the field of controller performance assessment, particularly the performance of multivariate Model-based Predictive Controllers, was investigated. Existing performance indices proposed in the literature were assessed for their suitability to Alcoa’s applications. For the greater part, these methods are not suited to the specific characteristics and functionality of Honeywell RMPCT. A CPA metric entitled Event Frequency Performance Index (EFPI) is proposed in this report. It is a composite metric comprising five component metrics each of which are designed to gauge different aspects of RMPCT performance. Its stages of development are described and it is applied to seven periods of RMPCT historical data. The metric results are analysed and compared to general expectations about controller performance for these assessment periods in order to determine the utility of the proposed approach. A historical benchmarking method for performance assessment is also proposed. This involves the identification of a period of controller operation that is known to be good and then comparing subsequent assessment periods to this benchmark. This approach is applied to three different aspects of RMPCT performance: CV limit violation, MV movement and economic optimisation. Performance indices using this method are obtained for six periods of RMPCT historical data

Exile in Language

Saint-John Perse\u27s poem Exil (1941) represents a deep meditation on the nature of writing as subsequent critical theory has developed that term. Though the poem seems to present a signature at the end, it may be that the poet through giving in to a radically different signifying practice is in some sense not the signatory of the text. The archaic setting and difficult-to-resolve cultural matrix from this perspective become means of examining the co-originary origins of thought and language. Close analysis of textual patterns reveals a composition practice based on anagrammatic patterning. This kind of questioning of language in the practice of the text drives out all other characters and even the subjectivity of the presumed speaking subject. Exil is thus an exile in language that causes its readers to re-examine structures of interiority and exteriority on which identity and culture are based