Browsing by Author "Van Dyk, F. E."

Now showing 1 - 3 of 3
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    Maintaining cold chain integrity : temperature breaks within fruit reefer containers in the Cape Town Container Terminal
    (University of South Africa, 2017) Goedhals-Gerber, Leila L.; Stander, C.; Van Dyk, F. E.
    South Africa is among the top 10 fruit-exporting countries in the world. The South African fruit industry has identifi ed temperature breaks along the fruit export cold chain that result in the deterioration of fruit quality, loss of market credibility, and fi nancial losses. Seventy percent (70%) of South African fruit exports are shipped through the Cape Town Container Terminal (CTCT). This in-depth case study provides a better understanding of the signifi cant challenges within the CTCT. This research revealed that 81% of the temperature breaks in fruit reefer containers carrying summer fruit originate within the CTCT. The average time for a reefer container to be plugged in from when it enters the port is 1 hour and 52 minutes; almost three times higher than the 40-minute goal time. Only one-fi fth of containers experienced no temperature breaks, while almost a quarter never cooled down to the target temperature. Operational issues that need to be addressed have been identifi ed, such as the increased use of gensets, improved scheduling for arrival at the CTCT, and training of port personnel as to the correct standards for cold chain management. There is, however, also a need for improved collaboration between the producers, fruit exporters, logistics service providers, the CTCT, and shipping lines to enable end-to-end integrity of the cold chain. The latter will be the subject of future research.
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    Modelling the South African fruit export infrastructure : a case study
    (Operations Research Society of South Africa, 2006) Ortmann, F. G.; Van Vuuren, J. H.; Van Dyk, F. E.
    A description is provided of work performed as part of the fruit logistics infrastructure project commissioned by the South African Deciduous Fruit Producers’ Trust and coordinated by the South African Council for Scientific and Industrial Research, as described in Van Dyk FE & Maspero E, 2004, An analysis of the South African fruit logistics infrastructure, ORiON, 20(1), pp. 55–72. After a brief introduction to the problem, two models (a single-commodity graph theoretic model and a multi-commodity mathematical programming model) are derived for determining the maximal weekly flow or throughput of fresh fruit through the South African national export infrastructure. These models are solved for two extreme seasonal export scenarios and the solutions show that no export infrastructure expansion is required in the near future — observed bottlenecks are not fundamental to the infrastructure and its capacities, but are rather due to sub-optimal management and utilisation of the existing infrastructure.
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    Simulation of fruit pallet movement in the port of Durban : a case study
    (Operations Research Society of South Africa, 2005) Bekker, J.; Mostert, M.; Van Dyk, F. E.
    ENGLISH ABSTRACT: This paper gives an overview of a discrete-event simulation study that was performed on pallet movement at Fresh Produce Terminals in the port of Durban, South Africa. The study formed part of an extended study of the logistics infrastructure of the South African fresh fruit industry and its export supply chain. The focus in this paper is on pallet movement in the terminal and its requirement on the storage capacity of the cold store facility. Specifics pertaining to input data analysis are provided, as well as a discussion of simulation model validation and output data analysis.