Purpose – The purpose of this paper is to analyse and compare the performances of portfolio optimisation models including Markowitz's mean-variance model (MV model), Konno and Yamazaki's mean-absolute deviation portfolio optimisation model (MAD model), Young's minimax portfolio model and the...

Purpose – In order to hedge against fluctuation in actual “show” for air freight services, cargo airlines engage in the allocation of more space capacity than they actually have. This practice can lead to overbooking of capacity which can incur costs to the airline when a cargo does show...

Purpose – The UK Chinook helicopter is a utility and attack helicopter being operated by the Royal Air Force (RAF). Its versatile nature is of enormous importance to the strategic capability of the RAF's operations. The purpose of this paper is to utilise systems-based forecasting to conduct...

Purpose – The purpose of this study is to examine whether individual demographic and socio-cultural factors affect actions taken by consumers in relation to ethical violations and failure (or perceived ethical violations and failure) by service operations firms. Design/methodology/approach –...

Purpose – This paper seeks to set out opportunities for the development of a UK‐focused feasibility and sizing model utilising linear programming. Design/methodology/approach – Optimisation of the model is conducted using integer linear programming developed using Excel Solver. Findings...

Purpose – Current research in the area of risk management within small and medium-sized enterprises (SMEs) appears predisposed towards risk, predominantly dealing with the willingness of SMEs to take on losses. However, in this pilot study, the authors aim to focus on a different aspect of...