Effluent discharge from septic tanks is affecting the environment in developing countries. The most challenging issue facing these countries is the cost of inadequate sanitation, which includes significant economic, social, and environmental burdens. Although most sanitation facilities are evaluated based on their immediate costs and benefits, their long-term performance should also be investig...

Abstract In this paper, we study a stochastic single-item, single-stage inventory system, in which orders from several production facilities are placed at one warehouse. An ( R , Q ) policy is applied to control the warehouse, and arrive according Poisson process include due date such that some information about future demand available. This advance (ADI) can be used adapt time-based shipment c...