Mike Yearworth

The non-codified use of Problem Structuring Methods and the need for a generic constitutive definition

When we use a PSM what is it we are actually doing? An answer to this question would enable the PSM community to considerably enlarge the available source of case studies by the inclusion of examples of non-codified PSM use. We start from Checkland’s own proposal for a “constitutive definition” of SSM, which originated from trying to answer the question of knowing when a claim of SSM use was legitimate. By extending this idea to a generic constitutive definition for all PSMs leads us to propose a self-consistent labelling schema for observed phenomena arising from PSMs in action. This consists of a set of testable propositions, which, through observation of putative PSM use, can be used to assess validity of claims of PSM use. Such evidential support for the propositions as may be found in putative PSM use can then make it back into a broader axiomatic formulation of PSMs through the use of a set-theoretic approach, which enables our method to scale to large data sets. The theoretical underpinning to our work is in causal realism and middle range theory. We illustrate our approach through the analysis of three case studies drawn from engineering organisations, a rich source of possible non-codified PSM use. The combination of a method for judging cases of non-codified PSM use, sound theoretical underpinning, and scalability to large data sets, we believe leads to a demystification of PSMs and should encourage their wider use.

AutONA: a system for automated multiple 1-1 negotiation

The AutONA (Automated One-to-one Negotiation Agent) system was conceived as a means of reducing these operational procurement costs, enabling procurement departments to automate as much price negotiation as possible, thus creating the option of reducing direct costs and/or redeployment of operational effort into strategic procurement requiring high human involvement. The problem domain has been limited to the automation of multiple 1:1 negotiations over price for quantities of a substitutable good subject to the organisations procurement constraints of target quantity, price ceiling and deadline.

Modeling and Assessing Variability in Energy Consumption During the Use Stage of Online Multimedia Services

In this study, we use an improved, more accurate model to analyze the energy footprint of content downloaded from a major online newspaper by means of various combinations of user devices and access networks. Our results indicate that previous analyses based on average figures for laptops or desktop personal computers predict national and global energy consumption values that are unrealistically high. Additionally, we identify the components that contribute most of the total energy consumption during the use stage of the life cycle of digital services. We find that, depending on the type of user device and access network employed, the data center where the news content originates consumes between 4% and 48% of the total energy consumption when news articles are read and between 2% and 11% when video content is viewed. Similarly, we find that user devices consume between 7% and 90% and 0.7% and 78% for articles and video content, respectively, depending on the type of user device and access network that is employed. Though increasing awareness of the energy consumption by data centers is justified, an analysis of our results shows that for individual users of the online newspaper we studied, energy use by user devices and the third‐generation (3G) mobile network are usually bigger contributors to the service footprint than the datacenters. Analysis of our results also shows that data transfer of video content has a significant energy use on the 3G mobile network, but less so elsewhere. Hence, a strategy of reducing the resolution of video would reduce the energy footprint for individual users who are using mobile devices to access content by the 3G network.

The uses of qualitative data in multimethodology: Developing causal loop diagrams during the coding process

In this research note we describe a method for exploring the creation of causal loop diagrams (CLDs) from the coding trees developed through a grounded theory approach and using computer aided qualitative data analysis software (CAQDAS). The theoretical background to the approach is multimethodology, in line with Minger’s description of paradigm crossing and is appropriately situated within the Appreciate and Analyse phases of PSM intervention. The practical use of this method has been explored and three case studies are presented from the domains of organisational change and entrepreneurial studies. The value of this method is twofold; (i) it has the potential to improve dynamic sensibility in the process of qualitative data analysis, and (ii) it can provide a more rigorous approach to developing CLDs in the formation stage of system dynamics modelling. We propose that the further development of this method requires its implementation within CAQDAS packages so that CLD creation, as a precursor to full system dynamics modelling, is contemporaneous with coding and consistent with a bridging strategy of paradigm crossing.

Understanding behaviour in problem structuring methods interventions with activity theory

This article argues that OR interventions, particularly problem structuring methods (PSM), are complex events that cannot be understood by conventional methods alone. In this paper an alternative approach is introduced, where the units of analysis are the activity systems constituted by and constitutive of PSM interventions. The paper outlines the main theoretical and methodological concerns that need to be appreciated in studying PSM interventions. The paper then explores activity theory as an approach to study them. A case study describing the use of this approach is provided.

Impact of location on the energy footprint of digital media

In order to accurately assess the impact of geographical location on the energy footprint of digital media requires energy usage models of the Internet that take into account the geographic distance between both users and data providers. In this paper, we present the first such model to do this. Given the specific location of a data source and a user, we use traceroute data to estimate the number and type of network devices involved in data transmission. We then calculate the energy required to transmit the data, combined with energy consumption and utilization data compiled from a number of sources including both academic publications and industry datasheets. Significant quantities of online data are now served by Content Delivery Networks (CDNs), which cache multiple copies of content in locations around the world. We find that CDNs whose primary role is to speed up delivery to the end user also reduce the energy footprint of the network.

Interpretative reporting and alarming based on laboratory data

The utilisation of laboratory services for patient diagnosis and management involves many steps with both clinical and laboratory components. The clinical components include the decision to order a test, interpretation of the test results and actions taken on the basis of the results. The laboratory components on the other hand include receipt of the request, specimen collection, preparation and analysis, result entry, test result validation and verification and reporting of the results. In this paper, which is part of the OpenLabs project, we concentrate on the post-analytical applications which include interpretation and reporting of the laboratory results to the users in primary care and in high dependency care units. The final objective of the work described is to develop generic modules which can be integrated both with an Open laboratory information system architecture and existing laboratory information processing environment.

Integrating Problem Solving and Research Methods Teaching for Systems Practice in Engineering

Problem solving and research methods apparently sit within different traditions of development evidenced by disparate sources of literature. However, in the graduate education of engineers taking an Engineering Doctorate (EngD) Program in Systems there is a need for their integration in such a way as to make their relationship clear. We argue from experience of course delivery and project supervision that research methods from business and management need to support a generic problem solving approach – informed from the Problem Structuring Methods (PSM) literature, and specifically Soft Systems Methodology (SSM) – such that they provide the rigorous evidence needed at any stage of a problem solving cycle. There is a clear hierarchy with a problem solving approach providing the guiding methodology for systems practice in engineering, and research methods supplying the means to generate answers to specific questions as they arise. We specifically discuss the special role of action research as both a problem solving and a research strategy and its relevance to engineering education, and suggest a philosophical underpinning for the approach.

Specifying an open clinical laboratory information system

This paper presents an overview of the architectural infrastructure in which existing laboratory information systems can be made to interoperate with additional modules offering a range of advanced clinical laboratory functionalities. The infrastructure is based on an open distributed computing platform, and its specification is described using the open distributed processing reference model.

Revisiting Jevons’ Paradox with System Dynamics: Systemic Causes and Potential Cures

This article examines the dynamic relationship between the consumption of goods and services, technological efficiency, and associated resource use, as described by the theory of Jevons’ Paradox (JP). A theory is presented about what causes JP, in which resource efficiency savings are eventually overtaken by increases in consumption to produce a net increase in resource use and therefore environmental impacts. An application of the theory was carried out using system dynamics, modeling carbon dioxide equivalent (CO‐eq) emissions from private road transport in the UK between 1970 and 2010. The model results indicate the approximate impact of JP within the historical period: a rise in travel consumption of approximately one half and a rise in CO‐eq emissions of approximately one third. The model was used to estimate whether the European Union (EU) goal of a 40% drop in CO‐eq emissions by 2030 is achievable in the road transport sector, by adding interventions, and the results indicate that higher increases in fleet efficiency than are currently forecast, costlier travel, and a reduction in travel consumption would all be required. The theory and model presented in this article highlight the need to implement a system of interventions that can influence the strength and direction of each of the feedback loops within the system being intervened with, if CO‐eq emissions are to be more reliably reduced than they are at present. Further, because the system is constantly evolving, intervening with it requires a responsive, holistic approach, while maintaining focus on a long‐term goal.