Stephen Michael Disney
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View article: Operations & supply chain management: principles and practice
Operations & supply chain management: principles and practice Open
Operations and Supply Chain Management (OSCM) has continually evolved, incorporating a broad array of strategies, frameworks, and technologies to address complex challenges across industries. This encyclopedic article provides a comprehens…
View article: Possibility theory: A foundation for theoretical and empirical explorations of uncertainty
Possibility theory: A foundation for theoretical and empirical explorations of uncertainty Open
This is the author accepted manuscript. The final version is available from Wiley via the DOI in this record
View article: Operational Research: methods and applications
Operational Research: methods and applications Open
Throughout its history, Operational Research has evolved to include methods, models and algorithms that have been applied to a wide range of contexts. This encyclopedic article consists of two main sections: methods and applications. The f…
View article: Operational Research: Methods and Applications
Operational Research: Methods and Applications Open
Throughout its history, Operational Research has evolved to include a variety of methods, models and algorithms that have been applied to a diverse and wide range of contexts. This encyclopedic article consists of two main sections: method…
View article: On the order-up-to policy with intermittent integer demand and logically consistent forecasts
On the order-up-to policy with intermittent integer demand and logically consistent forecasts Open
We measure the impact of a first-order integer auto-regressive, INAR(1), demand process on order-
up-to (OUT) replenishment policy dynamics. We obtain a unique understanding of the bullwhip
behaviour for slow moving integer demand. We fore…
View article: When bullwhip increases in the lead time: An eigenvalue analysis of ARMA demand
When bullwhip increases in the lead time: An eigenvalue analysis of ARMA demand Open
Problem definition. The impact of lead times on the bullwhip effect produced by the order-up-to (OUT) replenishment policy is studied. Practical relevance. Under general auto-regressive moving average (ARMA) demand, we investigate when the…
View article: On the stationary stochastic response of an order-constrained inventory system
On the stationary stochastic response of an order-constrained inventory system Open
We investigate the stochastic response of a base stock inventory system where the order quantity is either upper- or lower-constrained. This system can represent many real-world settings: forbidden returns, minimum order quantities, and ca…
View article: Volume Flexibility at Responsive Suppliers in Reshoring Decisions: Analysis of a Dual Sourcing Inventory Model
Volume Flexibility at Responsive Suppliers in Reshoring Decisions: Analysis of a Dual Sourcing Inventory Model Open
We investigate how volume flexibility, defined by a sourcing cost premium beyond a base capacity, at a local responsive supplier impacts the decision to reshore supply. The buyer also has access to a remote supplier that is cheaper with no…
View article: Dual Sourcing and Smoothing Under Nonstationary Demand Time Series: Reshoring with SpeedFactories
Dual Sourcing and Smoothing Under Nonstationary Demand Time Series: Reshoring with SpeedFactories Open
We investigate near-shoring a small part of the global production to local SpeedFactories that serve only the variable demand. The short lead time of the responsive SpeedFactory reduces the risk of making large volumes in advance, yet it d…
View article: Economies of collaboration in build‐to‐model operations
Economies of collaboration in build‐to‐model operations Open
The direct‐from‐model and tool‐less manufacturing process of 3D printing (3DP) embodies a general‐purpose technology, facilitating capacity sharing and outsourcing. Starting from a case study of a 3DP company (Shapeways) and a new market e…
View article: The bullwhip effect under count time series: The case of first order integer auto-regressive demand processes
The bullwhip effect under count time series: The case of first order integer auto-regressive demand processes Open
The impact of fast moving items, modeled by auto-regressive moving average (ARMA) type processes,
\non the bullwhip effect is well known. However, slow moving items that can be modeled using integer
\nARMA processes have received little at…
View article: Coordinating Supply Chains via Advance‐Order Discounts, Minimum Order Quantities, and Delegations
Coordinating Supply Chains via Advance‐Order Discounts, Minimum Order Quantities, and Delegations Open
To avoid inventory risks, manufacturers often place rush orders with suppliers only after they receive firm orders from their customers (retailers). Rush orders are costly to both parties because the supplier incurs higher production costs…
View article: The impact of stochastic lead times on the bullwhip effect under correlated demand and moving average forecasts
The impact of stochastic lead times on the bullwhip effect under correlated demand and moving average forecasts Open
We quantify the bullwhip effect (which measures how the variance in replenishment orders is amplified as the orders move up the supply chain) when random demands and random lead times are estimated using the industrially popular moving ave…
View article: Exploring nonlinear supply chains: the dynamics of capacity constraints
Exploring nonlinear supply chains: the dynamics of capacity constraints Open
While most supply chain models assume linearity, real production and distribution systems often operate in constrained contexts. This article aims to analyse the consequences of capacity limits in the order-up-to replenishment policy with …