SUNConferences, Computers and Industrial Engineering 42

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Impacts of Unforeseen Disruptions on Different Company-Layouts
Johannes Bekane Mapokgole, Thomas Tengen

Last modified: 2012-06-25

Abstract


Most South African companies invest largely on research aimed at developing and delivering products on-time. On-time delivery is amongst the many factors of business success. These factors are driven by the effectiveness of Supply Chain Systems. In this paper, it is shown how random disruptions affect the productivity of different company-layouts using systematic random sampling method and theory of probability.

The study reveals that leading sources of disruptions vary from industry to industry. For example, in manufacturing industry machine breakdowns, raw material shortages and employee absenteeism are the frequent causes of disruptions. In fixed-position layouts, retail and wholesale, IT and communications; adverse weather, transport networks and lack of storage facilities are the most common causes of disruption.

It is shown that disruption of one type may not greatly affect productivity of a certain company layout, whilst similar disruption can have devastating effect on another type. It is also shown that there is approximately 5% loss of productivity when order changes are being performed prior to production commencement and that productivity loss also increases exponentially as time progresses. However, it is possible to perform many order changes without any loss of efficiency. It can be concluded that the key variable affecting productivity following random disruption is the time of the change.


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