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Discrete control: Theoretical background
An overview of discrete linear control theory is given. Topics covered include: Dynamical systems and difference equations. The …
S.M. Disney
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Global dual sourcing with SpeedFactories: The case of correlated demand
We study a global dual sourcing supply chain setting under correlated auto-regressive, AR(1), demand. We consider three cases: a) …
S.M. Disney
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Impact of customers reaction to autocorrelated price sensitive demand on supply chains
We investigate the dynamics of a supply chain with a price-sensitive, autocorrelated, stochastic, linear demand model. We assume the …
T. Hosoda, S.M. Disney, G.C.J. Gaalman
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The more, the better, usually: An analytical investigation of the yield rate paradox in closed-loop supply chains
We investigate a closed-loop make-to-stock system consisting of a remanufacturer and a manufacturer with VAR(1) demand and return …
T. Hosoda, S.M. Disney, L. Zhou
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Discrete control theory
Using block diagrams, z-transforms and Tsypkin’s relation I show how to obtain the variances of the orders and inventory levels …
S.M. Disney
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When the bullwhip effect is an increasing function of the lead time
We show a positive demand impulse response leads to an always increasing in the lead time bullwhip effect when the order-up-to policy …
G. Gaalman, S.M. Disney, X. Wang
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Production optimization for short shelf-life products
We report on production planning improvements for a short shelf-life product. Using simulation, we optimized the production frequency …
S.M. Disney, L. Purvis, X.Meng
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Yield paradox in closed loop supply chains with auto- and cross-correlated demand and return processes
We investigate the dynamics of a closed-loop supply chain with VAR(1) demand and return processes. It is shown that the manufacturing …
T. Hosoda, S.M. Disney, L. Zhou
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Production optimization for short shelf-life products
We have been working with a UK dairy manufacturer on a two-year project which aims to understand and improve their forecasting and …
X.Meng, L. Purvis, S.M. Disney
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Discrete control theory
Using block diagrams, z-transforms and Tsypkin’s relation I show how to obtain the variances of the orders and inventory levels …
S.M. Disney
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