Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    A control model for object virtualization in supply chain management
    Verdouw, C.N. ; Beulens, A.J.M. ; Reijers, H.A. ; Vorst, J.G.A.J. van der - \ 2015
    Computers in Industry 68 (2015). - ISSN 0166-3615 - p. 116 - 131.
    information-systems - intelligent products - science research - design science - internet - things - life - technology - framework - demand
    Due to the emergence of the Internet of Things, supply chain control can increasingly be based on virtual objects instead of on the direct observation of physical objects. Object virtualization allows the decoupling of control activities from the handling and observing of physical products and resources. Moreover, virtual objects can be enriched with information that goes beyond human observation. This will allow for more advanced control capabilities, e.g. concerning tracking and tracing, quality monitoring and supply chain (re)planning. This paper proposes a control model for object virtualization in supply chain management, which is based on a multiple case study in the Dutch floriculture. It includes a typology of distinct mechanisms for object virtualization, which discerns reference objects and future projections next to the representation of real physical objects. The control model helps to define feasible redesign options for the virtualization of supply chain control. It is also of value as a basis to define the requirements for information systems that enable these redesign options.
    Farm management systems and the Future Internet era
    Kaloxylos, A. ; Eigenmann, R. ; Teye, F. ; Wolfert, J. - \ 2012
    Computers and Electronics in Agriculture 89 (2012). - ISSN 0168-1699 - p. 130 - 144.
    information-systems - agriculture - requirements - support - model
    Smart/precision farming systems are expected to play an important role in improving farming activities. During the past years, sophisticated farm management systems have emerged to replace outdated complex and monolithic farm systems and software tools. The latest trend is to enable these management systems to operate over the Internet. However, the Internet, in its current operation form, faces a number of shortcomings especially in handling vast numbers of networked devices (i.e., Internet of Things) or allowing a simplified integration of systems and services developed by different players. Currently, a number of research initiatives aim at addressing these shortcomings. Such an example is the "Future Internet" program launched by the European Commission. In the context of our work, we have specified a farm management system that takes advantage of the new characteristics that "Future Internet" offers. These come in terms of generic software modules that can be used to build farming related specialized modules. We present the functional architecture of this farm management system and provide an operational example. We also analyze the technological enablers that will make this architecture a reality.
    A framework for modelling business processes in demand-driven supply chains
    Verdouw, C.N. ; Beulens, A.J.M. ; Trienekens, J.H. ; Vorst, J.G.A.J. van der - \ 2011
    Production Planning & Control 22 (2011)4. - ISSN 0953-7287 - p. 365 - 388.
    operations management - information-systems - science research - design science - technology - organizations - opportunities - orientation - challenges - redesign
    Demand-driven supply chains are highly dynamic networks of different participants with different allocations of business processes and different modes of control and coordination. Companies must be able to take part in multiple supply chain configurations concurrently and to switch rapidly to new or adjusted configurations. This imposes stringent demands on information systems and requires a modelling approach that (1) combines high-level models for supply chain design with detailed models for engineering the accompanying information systems and (2) enables rapid instantiation of specific supply chain configurations from a repository of standard building blocks. This article designs a process modelling framework that enhances such an approach. Building on the terminology and process definitions provided by the Supply Chain Operations Reference model, it models supply chain configurations as specific sets of transformations, control systems and coordination mechanisms. The designed modelling framework is applied in a case study in the Dutch flower industry.
    Evaluation of the Dutch subsurface geoportal: What lies beneath?
    Lance, K.T. ; Georgiadou, Y. ; Bregt, A.K. - \ 2011
    Computers, Environment and Urban Systems 35 (2011)2. - ISSN 0198-9715 - p. 150 - 158.
    information-systems - organization
    This paper focuses on a geoportal from a “what lies beneath” perspective. It analyses processes of budgeting, planning, monitoring, performance measurement, and reporting of the national initiative titled Digital Information of the Dutch Subsurface (known by its Dutch acronym, DINO). The study is used as a means to empirically refine a conceptual model that illuminates how external agents influence or control the coordination of geo-information in the public sector. DINO is developed and maintained in a formal principal-agent relationship with clear objectives and accountability. DINO is managed by the Netherlands Institute of Applied Geoscience (the agent) through a performance-based management contract with the sponsoring Geo-Information Commission (the principals). The DINO program is characterized by the pooling of financial resources from five ministries, the internal tracking of activity progression, the routine reporting to the user community, and the regular monitoring and evaluation of DINO by the Geo-Information Commission. The case study reveals that ‘soft’ rather than ‘hard’ controls are used and that ‘mutual shaping’ takes place, with the agent influencing how it is ‘controlled’ by the principal. However, the management contract still relies on a power disparity and reinforces previous research findings that external parties can influence network/coordination conditions. In-depth case studies such as this work can increase understanding of evaluation in the context of politico-administrative processes and improve researchers’ ability to critically compare geoportal initiatives.
    Standardized data in the broiler value chain
    Yassin, H. ; Velthuis, A.G.J. ; Boerjan, M. ; Lourens, A. ; Oude Lansink, A.G.J.M. - \ 2011
    Poultry Science 90 (2011)2. - ISSN 0032-5791 - p. 498 - 506.
    information-systems - chick quality - hatching eggs - hatchability - breeders - performance - incubation - mortality - storage - weight
    In the Dutch broiler chain, data are collected as a routine practice. However, there is wide variation in the content of data collected and in data collection systems. This variability hampers the use of field data in management information systems to support decisions. The objective of this study was to analyze the quality of data and to standardize the content of data sets in the broiler production chain. To evaluate the quality of data, data sets from 3 Dutch hatcheries, from 23,637 batches of eggs, were assessed. The quality of data was assessed intuitively based on 7 quality attributes. To standardize the content of the data set, a protocol was proposed and validated. The protocol was validated at 30 breeder farms, 3 hatcheries, and 104 broiler farms by using 3 quality attributes: consistency, uniformity, and completeness. Results of the data quality analysis of the 3 Dutch hatcheries showed that the data sets had some fields with inaccurate, incorrect, inconsistent, nonuniform, incomprehensible, missing relevant, or incomplete data. Results of the validation protocol were as follows: feedback was obtained from 23 (77%) breeder farms, 3 (100%) hatcheries, and 7 (7%) broiler farms. Of all the questions, on average 88% were answered on breeder farms; 57, 65, and 82% were answered at each of the 3 hatcheries, respectively; and 79% were answered on the broiler farms. Data collected at 2 hatcheries were more consistent than those collected at the third hatchery. Hatchery data were less consistent than breeder farm data, but the number of data entries at hatcheries far exceeded the number at the farm level. Data from the hatcheries, breeder farms, and broiler farms were not always uniform, possibly because of differences in management strategies. This protocol enables the listing of relevant and standard contents of a data set whereby information exchange along the chain can be simplified. However, it is recommended that the protocol be supplemented with some rules for data collection and management, for example, that variables must be recorded in the provided fields, and that a variable must have one and only one name or code, the same unit of measurement, and the same definition
    Identifying and prioritising services in European terrestrial and freshwater ecosystems
    Harrison, P.A. ; Vandewalle, M. ; Sykes, M.T. ; Berry, P.M. ; Bugter, R.J.F. ; Bello, F. de; Feld, C.K. ; Grandin, U. ; Harrington, R. ; Haslett, J.R. ; Jongman, R.H.G. ; Luck, G.W. ; Martins da Silva, P. ; Moora, M. ; Settele, J. ; Sousa, J.P. ; Zobel, M. - \ 2010
    Biodiversity and Conservation 19 (2010). - ISSN 0960-3115 - p. 2791 - 2821.
    land-use - climate-change - agricultural landscapes - calcareous grasslands - species-diversity - seed dispersal - long-term - information-systems - vegetation dynamics - economic valuation
    Ecosystems are multifunctional and provide humanity with a broad array of vital services. Effective management of services requires an improved evidence base, identifying the role of ecosystems in delivering multiple services, which can assist policy-makers in maintaining them. Here, information from the literature and scientific experts was used to systematically document the importance of services and identify trends in their use and status over time for the main terrestrial and freshwater ecosystems in Europe. The results from this review show that intensively managed ecosystems contribute mostly to vital provisioning services (e.g. agro-ecosystems provide food via crops and livestock, and forests provide wood), while semi-natural ecosystems (e.g. grasslands and mountains) are key contributors of genetic resources and cultural services (e.g. aesthetic values and sense of place). The most recent European trends in human use of services show increases in demand for crops from agro-ecosystems, timber from forests, water flow regulation from rivers, wetlands and mountains, and recreation and ecotourism in most ecosystems, but decreases in livestock production, freshwater capture fisheries, wild foods and virtually all services associated with ecosystems which have considerably decreased in area (e.g. semi-natural grasslands). The condition of the majority of services show either a degraded or mixed status across Europe with the exception of recent enhancements in timber production in forests and mountains, freshwater provision, water/erosion/natural hazard regulation and recreation/ecotourism in mountains, and climate regulation in forests. Key gaps in knowledge were evident for certain services across all ecosystems, including the provision of biochemicals and natural medicines, genetic resources and the regulating services of seed dispersal, pest/disease regulation and invasion resistance.
    Mastering demand and supply uncertainty with combined product and process configuration
    Verdouw, C.N. ; Beulens, A.J.M. ; Trienekens, J.H. ; Verwaart, D. - \ 2010
    International Journal of Computer Integrated Manufacturing 23 (2010)6. - ISSN 0951-192X - p. 515 - 528.
    mass customization - order fulfillment - coordinating product - information-systems - chain management - process variety - design - enterprise - family - erp
    The key challenge for mastering high uncertainty of both demand and supply is to attune products and business processes in the entire supply chain continuously to customer requirements. Product configurators have proven to be powerful tools for managing demand uncertainty. This paper assesses how configurators can be used for combined product and process configuration in order to support mastering high uncertainty of both supply and demand. It defines the dependence between product and process configuration in a typology of interdependencies. The addressed dependences go beyond the definition phase and also include the effects of unforeseen backend events during configuration and execution. Based on a case study in the Dutch flower industry, a conceptual architecture is proposed for coordination of these interdependencies and development strategies are identified
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