Lead-time analysis and a control policy for production lines

Angelos A Economopoulos (1) , Vassilis S Kouikoglou (1)

1 Dept of Production Engineering and Management

We address a control problem for a production line which produces one product to stock and faces random demand. During stockouts, the system quotes a fixed response time for each arriving order, and the customers place their orders only if the response time promised meets their deadlines. Customer orders are filled on a first come, first served basis. A penalty cost is incurred whenever a customer is served later than promised. A two-parameter admission/inventory control policy is implemented that maintains a bounded backlog and a constant inventory position (total inventory minus backlog) in the system. For production lines with exponential processing times and Poisson demand, the mean profit rate of the system is computed analytically using closed queueing network formulas. For systems with general processing or interarrival time distributions, the profit rate is estimated via simulation. Simple properties are established which ensure that the profit maximizing control parameters can be determined in finite time using exhaustive search. Numerical results show that the proposed policy performs better than the make-to-order/zero-inventory and the lost-sales/make-to-stock policies.

Mots clés: Physical Sciences

Angelos A Economopoulos, Vassilis S Kouikoglou. Lead-time analysis and a control policy for production lines. International Journal of Production Research, 2010, pp.1. ⟨10.1080/00207541003627845⟩. ⟨hal-00586984⟩