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Featured researches published by Hans Liwång.


Journal of Military Studies | 2014

AN EXAMINATION OF THE IMPLEMENTATION OF RISK BASED APPROACHES IN MILITARY OPERATIONS

Hans Liwång; Marika Ericson; Martin Bang

Abstract Today several nations utilise risk based approaches in military planning. However, the discussion on limitations with the approaches in regard to aspects such as uncertainties, the nature of the threat and risk to civilians is limited. The aim of this work is to identify important challenges when applying risk based approaches to military activity. This article discusses risk based approaches in general and their military applications. Five generic quality requirements on risk analysis are presented from research in risk philosophy. Two military application areas for risk analysis: military intelligence, and risk management in legal assessments are analysed in relation to the presented quality requirements on risk analysis. From the analysis it is clear that risk analysis is an integral part of the decision-making analysis and cannot be separated in time, space or organisationally from the decision-making process in general. Defining the scenario to analyse, including the time span, is a central task in risk analysis and will affect every aspect of the risk estimation. Therefore, the principles for scenario definition must be communicated and continuously updated throughout the organisation. Handling the uncertainties throughout the process is also important, especially if the aim is a resilient military system.


Proceedings of the ASME Thirty-second International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2013) in Nantes, France, June 9-13, 2013 | 2013

Ship security analysis : the effect of ship speed and effective lookout

Hans Liwång; Jonas Ringsberg

The threat of piracy to commercial shipping is a concern for the protection and safeguarding of human lives, property and environment. Therefore, ships under piracy threat should follow security measures suggested by the International Maritime Organization (IMO) and the Contact Group on Piracy off the Coast of Somali. It is, therefore, important to choose the proper security measures for the right situation. This study presents a simulation model that can be used for probabilistic risk assessments regarding the operation of commercial ships. This investigation specifically studies the pirate approach phase and quantifies the effect of ship speed and effective lookout. The purpose of introducing probabilistic risk assessment into the analysis of pirate attacks is to meet safety goals more effectively through a well-balanced combination of proactive and reactive measures whilst keeping focus on the intended over all purpose of the particular ship. The study presents collected and documented knowledge regarding pirate capability, intention and likelihood to perform attacks. The knowledge is collected from experts with experience from the situation off the Horn of Africa. The collected information is input to an influence analysis that identifies the network of influences that govern the skiff approach. The simulation model describes piracy characteristics and decision making on the threatened ship, the characteristics and countermeasures of the ship under attack, as well as weather. Based on a comparison with available statistics the overall conclusion of the work is that the threat analysis and the simulation model can quantify and explain how the studied risk control options affect the probability of a successful approach. The result therefore exemplifies how a quantified ship security analysis can support the recommendations in industry guidelines and also enable recommendations that to a greater extent can facilitate an educated decision by the ship operators.


Defense & Security Analysis | 2016

Influences on threat assessment in a military context

Martin Bang; Hans Liwång

ABSTRACT The anchoring effect is a well-studied subject. This article connects the effect with the rules-in-use within a military intelligence institution. Particularly the rules-in-use that dictate that an analyst takes his or hers starting point from recently conducted assessments of the specific area or threat. The threat assessment as well as the written assessment were affected. The results show that officers have an aversion to lower a previous given threat assessment. This gives that to understand risk assessment we not only need to understand the methods used, we also need to understand the institutions in which they are used. This is especially relevant for military intelligence as the assessments are conducted in an environment of high uncertainty.


Defense & Security Analysis | 2017

Risk communication within military decision-making: pedagogic considerations

Hans Liwång

ABSTRACT Risk management is a decision-support process and a vital tool for military planning and decision-making. Today, several nations utilize risk-based approaches to analyze the level of security in military operations. There are both strengths and challenges in applying risk-based approaches to support military decisions. In this article, the challenges related to risk communication are investigated with the aim of describing how a military organization should train to create a good environment for effective risk communication. The analysis finds that it is important for the organization to define and consistently use a shared risk understanding. Such a shared risk understanding will need a systematic development process that focuses on the future decision makers’ and analysts’ education and training. To reach understanding, all involved parties must have the chance to identify the problem, reflect on its implications, test different solutions and develop a solution.


ASME Turbo Expo 2001: Power for Land, Sea, and Air | 2001

Management of High Speed Machinery Signatures to Meet Stealth Requirement in the Royal Swedish Navy Visby Class Corvette (YS 2000)

Hans Liwång; Lars Pejlert; Steve Miller; Jan-Erik Gustavsson

Over the years, the word stealth has been used more and more when discussing design and operational characteristics in military applications. New and more challenging techniques are constantly bein ...


Safety Science | 2013

Quantitative risk analysis - Ship security analysis for effective risk control options

Hans Liwång; Jonas Ringsberg; Martin Norsell


WMU journal of maritime affairs | 2015

Ship security challenges in high-risk areas: manageable or insurmountable?

Hans Liwång; Karl Sörenson; Cecilia Österman


Marine Structures | 2015

Survivability of an Ocean Patrol Vessels - Analysis approach and uncertainty treatment

Hans Liwång


R / Department of Shipping and Marine Technology, Chalmers University of Technology | 2012

Risk-based ship security analysis – an approach based on civilian and military methods

Hans Liwång


Archive | 2015

Risk-based ship security analysis - a decision-support approach

Hans Liwång

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Martin Norsell

Swedish National Defence College

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Jonas Ringsberg

Chalmers University of Technology

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Marika Ericson

Swedish National Defence College

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Karl Sörenson

Royal Institute of Technology

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