A problem of quantitative estimation of supply chains' reliability and sustainability
MAGAZINE №1 (72) February 2016
AUTHOR ZAJCEV E.I., BORODULINA S.A.
CATEGORY Reliability and stability of the supply chain Uncertainty and risk in the supply chain
ABSTRACT
The modern development of supply chains create new structural formations such as process type based on SCOR-models. However, the characteristics of the model are defined only qualitatively. The interpretation of their quantitative descriptions were not conducted.
It is necessary to develop a quantitative model of their characteristics. They will help to provide the efficiency of enterprises in logistics.
The article presents two versions of quantitative description for the SCOR model characteristics.
This article describes the options of sustainability assesment based on a new standard for reliability and based on the original methodology of complex sustainability assessment for the enterprises in logistics. The original algorithm of integrated stability assessment for company's business is considered The algorithm of the sustainability comprehensive assessment can be used to assess the economic sustainability of the providers processes, also for operators in supply chain and the supply chain as a whole, as well as for the diagnosis of it’s functionality. The considered approach opens up new possibilities for the development of quantitative methods for process models assessing in logistics.
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Calculation parameters of delivery reliability in supply with a non-stationary and discrete process of delivery faults
MAGAZINE №6 (71) December 2015
AUTHOR BOCHKAREV A.A., BOCHKAREV P.A.
CATEGORY Reliability and stability of the supply chain Sourcing Optimization and economic-mathematical modeling
ABSTRACT
Recently several scientific works have been published, which suggested to apply methods of reliability theory in order to calculate the delivery reliability in supplies. This supply system is seen as a recovery system; as for the reliability of supply it is characterized by the availability function K a, and general indicator of supply reliability is the probability of failure-free supply P(t) at a given time τ for the entire study period (t, t+τ), which is calculated on the assumption that the failure rate λ(t) obeys an exponential distribution. The results of our studies show the failure rate λ(t) is generally a subject to a normal distribution, instead of an exponential distribution. And existing methods of calculating the delivery reliability in supplies do not take into account the non-stationary and discontinuity of supply disruptions. This paper proposes an improved method of calculating the delivery reliability in supplies, which allows non-stationarity as well as discontinuity of supply disruptions, therefore, more accurate data describing the reliability of suppliers is obtained.
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