This paper presents a mathematical model for a redundancy allocation problem (RAP) for the series-parallel system with k-out-of-n subsystems and failure rate depends on working components of system. It means that failure rate of components increases when a component fails. The subsystems may use either active or cold-standby redundancy strategies. which considered as a decision variab... https://herbsdailyes.shop/product-category/diabetes-monitoring-glucose-meter-controls/