Quintiq file version 2.0
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#parent: #root
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Method GenerateSafetyStock
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{
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Description: 'Generate a safety stock (inventory specification) for this PISPIP.'
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TextBody:
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[*
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//calculate safety stock from attributes derived from PISP and PISPIP
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standarddeviationdemand := 0.0;
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sumofvariance := 0.0;
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// Calculate the sum of variance
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traverse ( this, PlanningBaseSalesDemandInPeriod , sdip )
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{
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sumofvariance := sumofvariance + sqr( sdip.Quantity() * ( sdip.MasterSalesDemand().DemandUncertaintyPercentage() / 100 ) );
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}
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// Calculate standard deviation of demand
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standarddeviationdemand := sqrt( sumofvariance );
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pisp := this.ProductInStockingPoint_MP();
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// Get the value of safety stock
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safetystock := this.GetSafetyStockValue( pisp.LeadTime(),
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pisp.StandardDeviationLeadTime(),
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this.SalesDemandQuantity(),
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standarddeviationdemand,
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NormalDistribution::Construct().Quantile( this.GetServiceLevelPercentage() / 100 ) );
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//checks if any existing SafetyStock exists
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newis := SafetyStock::FindTypeIndexSafetyStock( pisp.Product_MP().ID(),
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pisp.StockingPointID(),
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this.Start().Date() );
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//if no existing safetystock is found
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if( isnull( newis ) )
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{
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//only create a new SafetyStock (safety stock) only when the safetystock value >0
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if(( safetystock >0 ) )
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{
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newis := SafetyStock::Create( pisp.Product_MP(),
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pisp.StockingPoint_MP(),
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this.Start().Date(),
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false,
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0.0,
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safetystock,
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true,
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false,
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false );
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}
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}
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//if existing InventorySpecification is found, update its value instead
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else if( not newis.HasUserTarget() )
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{
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newis.Update( pisp.Product_MP(),
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pisp.StockingPoint_MP(),
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this.Start().Date(),
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false,
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0.0,
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safetystock,
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true,
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false,
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false );
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}
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*]
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}
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