Purpose – The main purpose of this research is to find an optimal allocation of marketing budgets which maximizes customer equity in an uncertain environment. Since markets are naturally uncertain environments, the aim is to incorporate uncertainty into the model. Design/methodology/approach...

Purpose – The liquefied natural gas (LNG) business comprises a number of economic activities with inherent risks. The purpose of this paper is to propose an integrated modelling approach, as part of the investment decision‐making process, for optimising economic returns from LNG whilst...

Purpose – Although the mean-variance portfolio selection model has been investigated in the literature, the difficulty associated with the application of the model when dealing with large-scale problems is limited. The aim of this paper is to close the gap by using the quadratic risk (standard...

Purpose – The purpose of this paper is to present a procedure for finding the efficient frontier, i.e. a non-decreasing curve representing the set of Pareto-optimal or non-dominated portfolios, when the standard Markowitz' classical mean-variance model is enriched with additional constraints....

Purpose – Although the mean-variance portfolio selection model has been investigated in the literature, the difficulty associated with the application of the model when dealing with large-scale problems is limited. The aim of this paper is to close the gap by using the quadratic risk (standard...

Purpose – Although the mean‐variance portfolio selection model has been investigated in the literature, the difficulty associated with the application of the model when dealing with large‐scale problems is limited. The aim of this paper is to close the gap by using the quadratic risk...

Purpose – This paper seeks to present an optimization‐based approach to design acceptance sampling plans by variables for controlling non‐conforming proportions in lots of items. Simple and double sampling plans with s known and unknown are addressed. Normal approximation distributions...

Purpose – The quality and efficiency of design and design services is declining. The authors propose that the problem is a systems delivery problem and not a technical competence issue. The purpose of this paper is to use a recently developed best value delivery methodology originally created...