Purpose – The purpose of this paper is to solve commitment problem of generating units in thermal power plants and to find the optimal dispatches of the committed units. Design/methodology/approach – The unit commitment (UC) problem has been solved in two stages. In the first stage, the...

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 – 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 – This paper aims to summarize the results of an empirical project to understand the perceptions of consumers of the future high end products in the USA. This project was a precursor of a larger global project on the topic. Design/methodology/approach – The approach utilizes the...

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...

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...

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 – 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 paper has two main aims: to focus on how the spare parts optimization process was conducted in the Norwegian Defence procurement projects that had used the system approach based on OPUS10, and whether coordination issues affected the process and results; and to analyse empirical...