خرید و دانلود پاورپوینت مديريت زنجيره تامين

پیش نمایش ” خرید و دانلود پاورپوینت مديريت زنجيره تامين “

خرید و دانلود پاورپوینت مديريت زنجيره تامين

مديريت زنجيره تامين

تصميم گيری در زنجيره تامين

Other Mathematical Programming Models

• Stochastic Programming Models

–The models discussed above assume that all parameters are known with certainty,

–This is not the case in real-life situations.

–To obtain robust results, the impact of uncertainty needs to be assessed.

–Stochastic programming is one of the techniques allowing accounting for stochastic parameters.

–Many of the stochastic programming models developed for supply chain configuration have demand as a stochastic parameter.

–Demand uncertainty usually is represented by multiple demand scenarios.

• Example:

–a prototype objective function can be expressed as:

–c represents all parameters of the supply chain configuration problem,

–D represents demand,

–Q represents continuous decision variables

–Y represents binary decision variables (e.g., inclusion of units in the supply chain).

–F is an abstract function,

–E is the expected profit,

مديريت زنجيره تامين

–s=1,…,S are evaluated demand scenarios.

• Kim et al. (2002) develop a model for determining ordering quantities from suppliers for a fixed supply chain network subject to demand uncertainty.

–The demand uncertainty is represented using demand probability density function

–an iterative model-solving procedure is developed without relying on using scenarios.

• Santos et al. (2005) develop a stochastic programming model for a typical supply chain configuration problem.

–The model minimizes total investment and operating costs

–deciding which facilities to build and routing products from suppliers to customers.

–It allows for uncertainty in

• processing/ transportation costs, demand, supplies, and capacities and for limited, but a very large number of scenarios representing uncertainty in demand, as well as in other parameters.
• The main constraints enforce capacity limits, flow conversion limits, and facility opening requirements
• The model is a two-stage stochastic program

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خرید و دانلود پاورپوینت مديريت زنجيره تامين

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