Rooij, P.J. de

demand non-critical demand level service service level order non-critical stock method service levels time t inventory approximation equipment policy replenishment orders model replenishment example backorder stockout simulation table result penalty costs system stock level method 1 method 2 class 0.13 replenishment order production penalty value time demand simulation results economic 20 cases criticality equipment criticality 69-77 56-57 poisson demand 0.16 priority 0.05 0.08 lot-for-lot policy poisson arrival method 3 dekker demand classes situation management section inventory control parameter inventory system control handling customer 0.11 0.17 99.3 1.500 inventory theory length nahmia noncritical demand petrochemical plant inventory position penalty cost difference lot-for-lot 95.4 paper 0.12 veinott