Optimising storage assignment, order picker routing, and order batching for an e-grocery fulfilment centre: An exact and heuristic approach

With (e-)grocery retailers striving to increase their efficiency and subsequently reduce their costs, the opportunities that lie in optimising the order picking process of the supply chain is of key importance. The complex nature of assigning articles to an optimal storage location, having efficient routing of order pickers, and optimised...

Surrogate Model Based Diagnostics for the GEnx-1B Turbofan Engine

Over the years, aero engines have evolved into the efficient turbofans present on commercial airliners today. Although these engines are very reliable, they still experience degradations in performance and reductions in component health. The degradation affects the operation of the engine, which can be measured using the pressure, temperature,...

An Analysis of the Transition to Liquid Hydrogen Infrastructure for Airports

Within this thesis report the transition to LH2 infrastructure at the airport is tackled. Specifically, how the airport can develop and adopt the infrastructure needed for LH2 supply logistics, storage, and refueling is researched. This process can be defined as a socio-technical transition in which a new niche technology (LH2 aviation...

United Nations Humanitarian Air Service: Network Optimization: A Tabu Search Approach

Network scheduling and fleet assignment are essential tasks for airline operation. In order to generate an optimal flight plan, the flight route and the flight schedule of each aircraft in the fleet requires deliberated consideration and planning. Compared with commercial airlines, which are in pursuit of maximal benefit during the operations,...

Impact Mitigation of Traffic Densities in Urban Airspace: An Urban Air Mobility Traffic Flow Management Perspective

Due to a projected shift in the majority of the world’s population towards urban areas and the existing traffic congestion in today’s cities, the possibility of using the third dimension for transportation of people and goods is being increasingly explored. The resultant congestion from an estimated demand of unmanned and Urban Air Mobility...

The Air Freight Flight Schedule Development Problem: AFFSDP

In this paper, we introduce the Air Freight Flight Schedule Development Problem (AFFSDP). In this problem, a cargo-only carrier has to adjust an existing flight schedule based on changes in the predicted demand. The result of this research is a model that combines airport selection, fleet routing and cargo routing, together with the use of a ...

Root cause analysis of ATC delays: A case study on KLM flights at Schiphol Airport

Due to the continuous growth of air traffic up to the year 2020, the air transportation network has become more complex, and the airports and airspace busier. However, capacities have not grown at the same rate as air traffic, making Air Traffic Control one of the most encountered primary delays. A data driven approach is taken in order to...

Assessment of Inbound Air Traffic Flow Management Delay and Total Arrival Delay for Amsterdam Airport Schiphol

In recent years Amsterdam Airport Schiphol (AAS) has been the airport with the highest Airport Air Traffic Flow Management (ATFM) delay in Europe. EUROCONTROL delays inbound flights heading towards AAS on departure, due to reasons at or around AAS. There are two main reasons for Airport ATFM delay at AAS, Weather and Aerodrome Capacity. This...

A Framework for Adopting Drones to a Logistics Cargo Operator Network

City logistics concern solutions in package movements that face challenges in rapid growth in demand for home deliveries, congestion, and expectations from consumers for sustainable solutions. Providing last mile delivery services with drones is considered a promising solution in literature as a response to the raising challenges in urban areas....

Dynamic request assignment in aerial ride sharing operations

The concept of Urban Air Mobility (UAM) services was created mainly in response to traffic congestions. In this research we focus on UAM services such as those provided by Uber Elevate. We therefore present a framework to solve the Urban Air Mobility Problem with Time Windows (UAMP-TW) under dynamic demand, using an Adaptive Large Neighborhood...

An observation-based analysis of the contribution of aviation emissions to local air quality near Schiphol airport

As poor air quality poses a risk to human health, this study aims to estimate the impact of Schiphol airport on local concentrations of various air pollutants from January 2014 to August 2020. The pollutants of interest are nitrogen monoxide, nitrogen dioxide, ozone and particulate matter. Three separate methods were applied: a comparison of air...

Coordinated Arrival and Departure Management

At many airports, the arrival and departure demand often outpaces the available airport capacity. Therefore, the flowof arriving and departing aircraft needs to be controlled to ensure safe and efficient operations. Many airports have been implementing systems that provide electronic assistance for air traffic control in planning and sequencing...

Aircraft Specific Carbon Emission Calculations For Air Freight Transportation: A Systematic Approach to Model Development to Promote Sustainable Purchasing and Green Market Positioning at PostNL

Commercial greenhouse gas emissions from aviation are proliferating, as is the concern among freight carriers to minimize their carbon footprint. From a corporate point of view, the United Nations International Civil Aviation Organization ( ICAO) expects aircraft emissions to triple by 2050, with aviation accounting for 25% of the world's carbon...

Modeling Tail-Specific Performance Using Historical Flight Data and Machine-Learning Techniques

Aircraft performance has always been a focus of attention in aviation. The work of aircraft designers, certifying agencies, aircraft operators, and air traffic controllers relies on aircraft performance models. Current aircraft performance models are based on performance data of brand-new aircraft, independent of airline configuration and...

Analysis of Contrail Formation Regions and Changes due to Climate Impact

As global warming has become a prominent issue for mankind, scientists are working on every possible aspects to slow down its pace. Aviation emission contributes more and more to the anthropogenic climate impact. Contrails contribute to about 30% of the aviation induced RF. Among the options that are proposed to mitigate the formation of...