Maritime Inventory Routing using Constraint Programming

The maritime inventory routing problem (MIRP) is a tactical and operational planning problem, that takes an integrated view on ship scheduling and inventory management for bulk products. Given production and consumption levels during a predetermined planning horizon, the problem aims at finding delivery schedules with minimal travel costs, such...

Sub-contraction in waste management: Evaluation of the performance of a waste collection service. A case study at Avery Dennison

The aim of this thesis is to investigate how the collection of industrial waste can be managed with different types of sub-contraction. Literature review was conducted in order to obtain knowledge about how this type of problems can be modelled along with the types of sub-contraction and how the logistical performance could be assessed....

Optimisation methods for the multi-period petrol station replenishment problem: A case study at AMCS

The petrol distribution problem is well-known in the literature as the Petrol Station Replenishment Problem (PSRP). This research concerns a "rich" version of the multi-period PSRP with real-life characteristics, to represent the complexity of the practical problem. The planning is optimised over multiple days, since stations do not need to be...

Waste collection inventory routing with non-stationary stochastic demands

We solve a rich routing problem inspired from practice, in which a heterogeneous fixed fleet is used for collecting recyclable waste from large containers over a finite planning horizon. Each container is equipped with a sensor that communicates its level at the start of the day. Given a history of observations, a forecasting model is used to...

The Multi-period Petrol Station Replenishment Problem: Formulation and Solution Methods

We present a “rich” Petrol Station Replenishment Problem (PSRP) with real-life characteristics that represents the complexities involved in actual operations. The planning is optimised over multiple days and therefore, the new variant can be classified as the Multi-Period Petrol Station Replenishment Problem (MP-PSRP). A Mixed Integer Linear...

Vessel routing for sweeping of marine litter in a port area

In literature it is widely accepted that 80% of the marine litter originates from land based sources. Since seaports usually are strategically situated with an inland waterway connection, it is not surprising that seaports have to deal with marine litter. Port authorities would like to avert excessive amounts of marine litter by sweeping marine...