Strategic Airline Crew Sizing: A Two-Stage Stochastic Optimisation Approach

This paper introduces a new two-stage stochastic optimisation approach for the strategic airline crew planning problem with uncertain demand. The developed model provides the airline with a cockpit crew composition plan per crew position before the flight schedule and crew demand are known. This is done by estimating future crew demand and by...

Probabilistic Reliability Assessment for Non-Linear Finite Element Analysis of Reinforced Concrete Beams

Non-linear finite element analysis (NLFEA) is a powerful numerical solution method that can enhance accurate determination of the structural resistance for a more efficient design. However, the implementation of NLFEA for the design of reinforced concrete structures is lagging behind as related uncertain- ties have not been quantified adequately...

Probabilistic strain-fatigue life performance based on stochastic analysis of structural and WAAM-stainless steels

Wire arc additive manufacturing (WAAM) has increasingly attracted attention in the construction sector because of its ability to produce large metallic structural parts in short times. In this paper, Coffin-Manson and Morrow (CMM) equation is employed to compare the fatigue life of WAAM stainless steel with the structural steels S355 and S690...

A copula-based sensitivity analysis method and its application to a North Sea sediment transport model

This paper describes a novel sensitivity analysis method, able to handle dependency relationships between model parameters. The starting point is the popular Morris (1991) algorithm, which was initially devised under the assumption of parameter independence. This important limitation is tackled by allowing the user to incorporate dependency...

Towards an efficient sensitivity analysis of wave forcing in coastal erosion studies: A case study of Negril Coast, Jamaica

This research investigates approaches to conduct an efficient sensitivity analysis of wave forcing in coastal erosion studies. For this three speed-accuracy trade-offs have been assessed: (i) between the use of a simple and a complex model, (ii) between the use of several methods for conducting a sensitivity analysis, and (iii) between the use...