47 citations · 82 across the 8 of their papers we have counts for
9 papers
Activity delay patterns in project networks
Alexei Vazquez, Chrysostomos Marasinou, Georgios Kalogridis +1
Delays in activities completion drive human projects to schedule and cost overruns. It is believed activity delays are the consequence of multiple idiosyncrasies without specific p…
Activity networks determine project performance
Alexei Vazquez, Iacopo Pozzana, Georgios Kalogridis +1
Projects are characterised by activity networks with a critical path, a sequence of activities from start to end, that must be finished on time to complete the project on time. Wat…
Spreading of performance fluctuations on real-world project networks
Iacopo Pozzana, Christos Ellinas, Georgios Kalogridis +1
Understanding the role of individual nodes is a key challenge in the study of spreading processes on networks. In this work we propose a novel metric, the reachability-heterogeneit…
Uncovering the fragility of large-scale engineering project networks
Marc Santolini, Christos Ellinas, Christos Nicolaides
Engineering projects are notoriously hard to complete on-time, with project delays often theorised to propagate across interdependent activities. Here, we use a novel dataset consi…
Modelling project failure and its mitigation in a time-stamped network of interrelated tasks
Christos Ellinas, Naoki Masuda
Resolving major societal challenges, such as stagnated economic growth or wasted resources, heavily relies on successful project delivery. However, projects are notoriously hard to…
Team dynamics during the delivery of a large-scale, engineered system
Christos Ellinas
Coordinated collective action refers to the synchronized action of agents towards achieving a predefined set of goals. Such activity is at the core of a wide range of social challe…
Modelling indirect interactions during failure spreading in a project activity network
Christos Ellinas
Spreading broadly refers to the notion of an entity propagating throughout a networked system via its interacting components. Evidence of its ubiquity and severity can be seen in a…
Evaluating the role of risk networks on risk identification, classification and emergence
Christos Ellinas, Neil Allan, Caroline Coombe
Modern society heavily relies on strongly connected, socio-technical systems. As a result, distinct risks threatening the operation of individual systems can no longer be treated i…
Dynamics of organizational culture: Individual beliefs vs. social conformity
Christos Ellinas, Neil Allan, Anders Johansson
The complex nature of organizational culture challenges our ability to infers its underlying dynamics from observational studies. Recent computational studies have adopted a distin…