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The International Journal of Logistics ManagementOn uncertainty in supply chain risk managementJyri Vilko Paavo Ritala Jan Edelmann
Article information:To cite this document:Jyri Vilko Paavo Ritala Jan Edelmann , (2014),"On uncertainty in supply chain risk management", TheInternational Journal of Logistics Management, Vol. 25 Iss 1 pp. 3 - 19Permanent link to this document:http://dx.doi.org/10.1108/IJLM-10-2012-0126
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Users who downloaded this article also downloaded:Andreas Wieland, Carl Marcus Wallenburg, (2012),"Dealing with supply chain risks: Linking riskmanagement practices and strategies to performance", International Journal of Physical Distribution &Logistics Management, Vol. 42 Iss 10 pp. 887-905Archie Lockamy III, (2014),"Assessing disaster risks in supply chains", Industrial Management & DataSystems, Vol. 114 Iss 5 pp. 755-777 http://dx.doi.org/10.1108/IMDS-11-2013-0477Shashank Rao, Thomas J. Goldsby, (2009),"Supply chain risks: a review and typology", The InternationalJournal of Logistics Management, Vol. 20 Iss 1 pp. 97-123
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http://dx.doi.org/10.1108/IJLM-10-2012-0126On uncertainty in supplychain risk management
Jyri Vilko, Paavo Ritala and Jan EdelmannSchool of Business, Lappeenranta University of Technology,
Lappeenranta, Finland
Abstract
Purpose The concept of uncertainty is a relevant yet little understood area within supply chain riskmanagement. Risk is often associated with uncertainty, but in reality uncertainty is a much moreelaborate concept and deserves more in-depth scrutiny. To bridge this gap, the purpose of this paper isto propose a conceptual framework for assessing the levels and nature of uncertainty in this context.Design/methodology/approach The aim of the study is to link established theories of uncertaintyto the management of risk in supply chains, to gain a holistic understanding of its levels and nature.The proposed conceptual model concerns the role of certainty and uncertainty in this context.Illustrative examples show the applicability of the model.Findings The study describes in detail a way of analysing the levels and nature of uncertainty insupply chains. Such analysis could provide crucial information enabling more efficient and effectiveimplementation of supply chain risk management.Practical implications The study enhances understanding of the nature of the uncertaintiesfaced in supply chains. Thus it should be possible to improve existing measures and analyses of risk,which could increase the efficiency and effectiveness of supply chain and logistics management.Originality/value The proposed conceptual framework of uncertainty types in the supply chaincontext is novel, and therefore could enhance understanding of uncertainty and risk in supply andlogistics management and make it easier to categorise, as well as initiate further research in the field.
Keywords Uncertainty, Risk, Supply chain risk management, Conceptual framework
Paper type Conceptual paper
1. IntroductionComplexity, specialisation, and disintegration are emerging as major challenges interms of risk management in supply chains, having made them vulnerable to disturbancesfrom both inside and outside the system. Indeed, many recent events have shown howvulnerable long and complex supply chains are. Such events include the well-knownmelamine crisis in Chinese dairy products, and other food crises; major natural disastersincluding floods, tsunamis, and earthquakes; industrial and societal disputes across theglobe, as well as firm and supply chain-specific glitches and disturbances (Hendricks andSinghal, 2003; Chopra and Sodhi, 2004; Sheffi, 2005; Narasimhan and Talluri, 2009).This vulnerability has attracted the attention of many academics in the field of logisticsand supply management, in which risk-related issues are increasingly taken into account(Minahan, 2005; Kleindorfer and Saad, 2005; Sanchez-Rodrigues et al., 2008, 2010; Wagnerand Neshat, 2010; Ghagde et al., 2012). In this context, the quality and competitivenessof individual companies operations depend on their ability to identify and mitigate theuncertainties and risks they encounter. However, although awareness of vulnerability andof risk management is increasing among academics and practitioners, many relatedconcepts are still in their infancy. There are thus insufficient conceptual frameworks and
The current issue and full text archive of this journal is available atwww.emeraldinsight.com/0957-4093.htm
Received 31 October 2012Revised 2 April 2013
2 September 2013Accepted 27 September 2013
The International Journal of LogisticsManagement
Vol. 25 No. 1, 2014pp. 3-19
r Emerald Group Publishing Limited0957-4093
DOI 10.1108/IJLM-10-2012-0126
This paper is based on a paper presented at the 17th International Symposium on Logistics(www.isl21.net) held in July 2012 in Cape Town, South Africa.
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empirical findings to provide a clear picture of the phenomenon of supply chainrisk management ( Juttner, 2005; Manuj and Mentzer, 2008). Accordingly, bothacademic research and practitioner reports stress its importance as well as the need todevelop different approaches (Blos et al., 2009; Manuj and Mentzer, 2008; Shaer andGoedhart, 2009).
In line with the above-mentioned developments, the role of supply chain riskmanagement has recently been increasingly emphasised. Indeed, Ju (2005) found that44 per cent of organisations expected their vulnerabilities to increase within thenext five years. More recently, the need for risk management has become evidentfollowing Snells (2010) study showing that 90 per cent of the respondent companiesfeared supply risks, whereas only 60 per cent felt confident or knowledgeable enoughto cope with them. In addition, Hendricks and Singhal (2005) found out that firms thatexperience supply chain disruptions experience on average 40 per cent stock returns.Thus, it is not surprising that there is a growing interest in supply chain-relateddecisions and the uncertainty and risk involved (Prater, 2005; Swink and Zsidisin,2006; Craighead et al., 2007; Hendricks et al., 2009; Hult et al., 2010). In fact, it hastraditionally been assumed that supply side risk is similar to or equivalent to demandside risk (Christopher and Peck, 2004). However, it has been suggested that supply-siderisks and uncertainty are much more complex issues than demand-side ones, and that,therefore, managing them needs more careful attention (see Snyder and Shen, 2006).
Supply chain risk management concerns risk as a situation entailing exposureto two essential components: an event and the uncertainty concerning the possibleoutcomes (Holton, 2004; Sheffi, 2005). Thus, risk assessment is based on the likelihoodof the occurrence of the risk situation, and on the kind of damage it might entail ifrealised (Mitchell, 1995). The different types of risk are extensively covered in therelevant literature (Rao and Goldsby, 2009), but analysis of the concept of risk itself isvery limited. For instance, the management of risk is commonly discussed in terms ofvulnerability and uncertainty (Sorensen, 2005), meaning that the concept is understoodas an occurrence for which the probability distribution is known. However, we suggestthat in reality, it is much more common that the probability distributions cannotbe defined. Thus, in order to enhance understanding of how risks could be bettermanaged under such conditions, we put forward a conceptual framework focused onthe role of uncertainty in supply chain risk management.
Supporting our argument and illustrating the research gap, some authors havecriticised the fact that the literature on supply chain risk management does not alwaysclearly distinguish between risk and uncertainty, which makes the definitions quitevague (Tang and Nurmaya Musa, 2010). Further, it has been suggested that merelyrecognising uncertainty is not enough, but researchers and practitioners need morerigorous frameworks breaking uncertainty down into more detailed elements (Prater,2005). Indeed, earlier studies have reported that the concepts of risk and uncertaintyare less understood and developed in this context than in other disciplines (Khan andBurnes, 2007). Given that the two concepts are among the most essential in supplychain risk management, clarity is of the essence. The aim in this paper, therefore,is to enhance understanding of these concepts by illustrating the levels of uncertaintyin supply chain risk management. In so doing, we hope to define the nature ofuncertainty so as to facilitate a more comprehensive and valuable consideration of howthe concept should be approached in future studies in the field.
In the next section, we introduce the theoretical background of supply chain riskmanagement and uncertainty. We then develop our conceptual model of different types
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of certainty/uncertainty and their implications for the analysis and management ofsupply chain risk. In building the framework, we utilise an integrative literature review,aiming to synthesise and integrate existing literature in the quest of generatingnew frameworks and perspectives (Torraco, 2005). We mainly build on the existingsupply chain risk management literature and combine it with the insights from economictheory on certainty vs uncertainty (Simon, 1957; Langlois, 1984; Dosi and Egidi, 1991).Illustrative examples of each type of uncertainty follow, which cover events relatedto the focal actor, the supply chain, and the external environment. The study ends withdiscussion of the theoretical and practical implications and further research directions.
2. Theoretical background2.1 Supply chain risk managementThe supply chain comprises a series of activities and organisations through whichmaterial and information move on their way to the final customer. Peck (2005) describessupply chain vulnerability in this context as exposure to serious disturbance arising fromrisks within and external to the chain. According to Waters (2007), vulnerability reflectsthe susceptibility of a supply chain to disruption, and is a consequence of risks in it.Ju (2005) further refers to supply chain vulnerability as the propensity of risk sources anddrivers to outweigh risk-mitigating strategies, thus causing adverse consequences in thechain and jeopardising its ability to effectively serve the end customer market. Supplychain risk management, in turn, is a function that aims to identify the potential sources ofrisk, and to implement appropriate actions to avoid or contain supply chain vulnerability(Narasimhan and Talluri, 2009; see also Ghagde et al., 2012).
Supply chain risk is commonly portrayed as a threat that something mighthappen to disrupt normal activities and that would stop things happening as planned(Waters, 2007). Most of the literature defines risk as purely negative and leading toundesired results or consequences (Harland et al., 2003; Manuj and Mentzer, 2008).A standard formula for the quantitative definition of supply chain risk is (Mitchell, 1995):
Risk PLoss ILoss
where risk is defined as the probability ( P ) of loss and its significance (I).Hetland (2003) and Diekmann et al. (1988) view risk as an implicitly uncertain
phenomenon. It should be noted that there are differences between the two conceptsof risk and uncertainty, however. Waters (2007) explains the difference, suggesting thata risk occurs because there is a certain type of uncertainty about the future. In thistraditional risk management context, uncertainty means that unexpected events mayoccur, but they can be quantified and therefore managed.
However, as a concept, uncertainty reaches far beyond the traditional conceptionof risk, and thus it deserves more elaborate scrutiny. Van der Vorst and Beulens (2002,p. 413) define supply chain uncertainty as decision making situations in the supplychain in which the decision maker does not know definitely what to decide as he isindistinct about the objectives; lacks information about its environment or the supplychain; lacks information processing capacity; is unable to accurately predict the impactof possible control actions on supply chain behaviour; or, lacks effective controlactions. The sources of uncertainty include quantity, quality, and time (Van der Vorstand Beulens, 2002).
Davis (1993) was among the first scholars to explicitly consider uncertainty as astrategic issue for supply chains. However, in his investigations, the sources were
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limited to suppliers, manufacturing, and customers, and the effects to theperformance of the supply chain. Later, building on the work of Davis (1993),Mason-Jones and Towill, 1998 developed an uncertainty circle model, adding controlsystems as one more source and offering a wider perspective on the supply anddemand sides of the chain; this was then further complemented by Geary et al. (2002)and Sanchez-Rodrigues et al. (2008).
It appears from these studies that uncertainty has been taken into account in supplychain risk management in various ways and in different contexts, but the literature stilllacks frameworks and consensus in terms of the role of uncertainty.
2.2 Uncertainty and riskKnights (1921) distinction between certainty, risk, and uncertainty could beregarded as the best-known and most frequently used typology of uncertainty inrisk management. In his definition of risk, he coined the terms measurable uncertainty(quantitative) and unmeasurable uncertainty (non-quantitative), when only partialknowledge of outcomes such as beliefs and opinions is available. The measurable,quantifiable perspective portrays a type of basic uncertainty that can be managedusing objective measures, whereas Knightian uncertainty refers to immeasurablerisks that cannot be calculated. We adopt this intuition as our starting point indeveloping a framework for uncertainty in supply chain risk management.
In this context, Trkman and McCormack (2009) classify uncertainty in two categories,endogenous and exogenous, depending on whether they derive from within or outsidethe supply chain. Juttner et al. (2003) also suggest including external uncertainty inother sources of uncertainty in the chain. The exogenous-endogenous distinction initself, however, is too vague to make sense of how uncertainty really affects decisionsrelated to supply chain risk management: it describes the source of uncertainty, whichis relevant as such, but it does not describe the type of uncertainty. Thus, we proposethat uncertainty, especially in the context of supply chain risk management, couldbe examined through the lenses of substantive and procedural uncertainty, asexplained below.
In line with Simons (1957) concept of rationality, Dosi and Egidi (1991, pp. 145-146)introduce the notions of substantive and procedural uncertainty. Substantiveuncertainty derives from the incompleteness of the information set and is relatedto a lack of information about environmental events and all the informationwhich would be necessary to make decisions with certain outcomes. A similar notionhas been discussed in the project management context by De Meyer et al. (2002), whodiscuss unforeseen uncertainty, which refers to the lack of ability to predict factors thatinfluence project-related risks.
Procedural uncertainty arises from the inability of the agents to recognise andinterpret the relevant information, even when available. It concerns the competencegap in problem-solving and limitations on the computational and cognitivecapabilities of the agents to pursue unambiguously their objectives, given the availableinformation. Uncertainty in a supply chain could be classified as illustratedin Figure 1.
The main components used to distinguish between types of uncertainty include thefollowing:
(1) the knowledge level of the decision maker related to the problem under eachtype of uncertainty;
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(2) the decision-makers knowledge of the possible actions in which to engage;
(3) the decision-makers knowledge of possible states of the world;
(4) the decision-makers knowledge of the consequences resulting from the interactionbetween actions and states of the world; and
(5) the decision-makers subjective or objective knowledge of the probabilities ofthe occurrence of possible states of the world.
This classification distinguishes three types of uncertainty: parametric and structural(i.e. environment dependent) and procedural (i.e. decision-maker dependent). We believethis distinction gives a valuable perspective on uncertainty related to decision making(Langlois, 1984; Dosi and Egidi, 1991; Kylaheiko, 1995; Kylaheiko et al., 2002).Within each of these categories, the decision maker has a different amount of knowledgeabout the state of the world and its events, and therefore also has different kinds ofresources with which to cope with uncertainty. At the extreme, uncertainty could alsobe conceptualised as radical, when all pieces of knowledge are imperfect and there is noknowledge about the structure or probability of future events (Loasby, 1976; Kylaheiko,1995).
3. Conceptualising (un)certainty in the supply chain contextSupply chain risk management is assumed to handle risks either by proactivelymitigating them or by reactively responding to them (Chopra and Sodhi, 2004; Tomlin,2006; Ghagde et al., 2012). The current literature on supply chain risk commonly viewsall threats disrupting normal activities (i.e. risks) as products of the impact and theprobability of an event (March and Shapira, 1987; Manuj and Mentzer, 2008; Vilko andHallikas, 2012), which in reality may be impossible to measure. Thus, we suggest thatthe nature of uncertainties plays a crucial role here, since it affects the visibility and thepossibilities of decision makers within a certain domain (see De Meyer et al., 2002;
CERTAINTY
RISK
UNCERTAINTY
SUBSTANTIVE PROCEDURAL
PARAMETRIC COMPLEXITYSTRUCTURAL
Related to the outcomesEnvironment-dependent
Related to the decision processDecision-maker dependent
Knightian basic uncertainty
Figure 1.Certainty, risk,
and uncertainty
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Prater, 2005). Thus, if supply chain management is to accomplish its tasks in boththeory and practice, it has to understand the concept of uncertainty in its entirety.
Given that the environment cannot normally be fully controlled, there are alwaysunknown elements facing decision makers. In general, decision makers in firms need tocope with decision-making variables that involve variation within a predictable rangeas well as events that are close to chaos or crisis (Weick, 1993; Pearson and Clair, 1998;De Meyer et al., 2002). Taking into account all the influential environmental factors istherefore impossible, and the information on the basis of which probabilities areformed is more or less imperfect. In light of the above discussion on various types ofuncertainty, Table I explains in more detail the range between (complete) certainty andradical uncertainty and the implications for supply chain risk management.
Table I describes the amount of knowledge that decision makers hold about thestate of the world (here: the supply chain) and its events. The amount of knowledgethus describes the decision makers ability to cope with uncertainty.
Complete certainty, as illustrated in the first column, is an example of a hypotheticalworld in which all relevant information is known to the decision maker. In terms ofsupply chain risks, it suggests a situation in which all related risks (inside and outsideof the chain) and their consequences are known. Thus, in such a situation, there are noactual risks, because all of them can be mitigated. In reality, this situation is, of course,impossible.
The second column describes a situation in which the structure of future events isknown in terms of objective probabilities concerning the likelihood and impact of theiroccurrence. This probabilistic certainty is typically regarded as an implicit basis forthe analysis of supply chain risk and the subsequent management actions. However,typically the level of knowledge required for objectively assessing the likelihood andimpact of risk events is rarely known, which is why various types of uncertainty needto be addressed as well.
The third column illustrates a situation in which the structure of the future(or future event) is completely known but the probability parameters are not.The uncertainty here is environment dependent. This situation is referred to asparametric uncertainty, and it includes only subjective beliefs about the probabilities offuture events and their outcomes (Langlois, 1984; Dosi and Egidi, 1991). In termsof supply chain risk management, potential risk events are identified, but in terms oflikelihood and impact, they are difficult to assess objectively the risk analysis is basedon subjective assessment. Parametric uncertainty allows quantification of differentaspects of the events; however, the following categories of uncertainty do not, and theycan only be described (assessed) qualitatively.
The fourth column indicates environment-dependent structural uncertainty.Knowledge related to the state of the world in the future is imperfect, and onlysubjective beliefs can be projected (Langlois, 1984). In terms of supply chain riskmanagement, this means that no holistic picture of the supply chain and the relatedrisk events can be objectively formed. The probabilities of the identified events are alsodifficult to quantify, and the interdependence related to the operations of the supplychain is unclear. Therefore, the analysis cannot objectively assess the risk eventsor their causality.
The fifth column in the table illustrates procedural uncertainty, meaning that thedecision maker is constrained by his or her computational and cognitive capabilities(Dosi and Egidi, 1991) and therefore cannot form a clear picture of the processes or therisk events, mainly on account of their complexity. Inadequate cognitive abilities and
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Cer
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Table I.On defining uncertainty
in supply chains
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Cer
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Table I.
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imperfect knowledge related to future events severely limit the decision maker inpursuing set objectives. In the context of supply chain risk management, this reflects asituation in which the supply chain has severely limited visibility in terms of itsactivities and the related risks. Only a fraction of the events and risk can be identifiedand analysed and then merely subjectively. Further, structural and parametricuncertainties may be associated with procedural uncertainty; the sources of uncertaintythat allow some actors to generate unforeseeable changes are endogenous sources ofuncertainty for others (Dosi and Egidi, 1991).
The last column, radical uncertainty, refers to a hypothetical world in which there istotal imperfection in terms of knowledge (see Prater, 2005, on chaotic uncertainty forparallel discussion). Thus, supply chain risk management and analysis are impossiblein that all knowledge related to each decision-making element is incomplete, whichdoes not even allow the formation of subjective beliefs about future events. This type ofuncertainty is unlikely in any situation, given that subjective beliefs may be based on avery limited understanding of events and their context.
4. The applicability of the frameworkBy way of a practical illustration of the application of the developed framework insupply chain risk management, we follow typical examples of risk through thedifferent uncertainty categories (Table II). We distinguish between events related tothe focal actor, the supply chain, and the external environment (which is a widelyadopted distinction in the literature, e.g. Trkman and McCormack, 2009).
With regard to events related to the focal actor, we illustrate the risk of industrialunrest (employee strike affecting the focal actors activities). This risk is quite easilymitigated on the left-hand side of the framework, with complete certainty and probabilisticcertainty, because management can prepare for known situations in which employeestrikes threaten supply chain and logistics operations. In contrast, moving towardsmore radical forms of uncertainty, the related factors and causalities start to become moreunclear, and their assessment more subjective. Managing risks is likely to be a muchthornier task in these situations.
Turning to events related to the supply chain, we give the example of the crash(operational failure/malfunction) of supply chain information systems, which is anincreasing concern in supply chain and logistics operations. When there is aprobabilistic certainty (a typical definition of risk assessment), it is possible to preparefor the crashes and failures, and the risks can be sufficiently mitigated. However, on theright-hand side of the framework, events leading to information system crashes maynot be understood or recognised, which makes preparing for them very difficult,if not impossible.
In terms of the external environment, our example relates to a sudden and impactfuleconomic crisis. In conditions of certainty, there are no risks, because there is perfectinformation regarding the economy and related factors. Although this is definitely notrealistic, probabilistic certainty (i.e. the traditional risk-assessment category) is not avery likely scenario either, in the long run. In fact, economic situations may very likelyinvolve parametric uncertainty issues such as unanticipated fluctuations in supply anddemand, which may have an impact that can only be subjectively assessed. Thesesituations may also involve even more uncertainty that is not fully understood and ishard to define (e.g. in emerging economies).
These examples show the importance of analysing the nature of uncertainty insupply chain and logistics operations. In order to effectively manage the risks involved,
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nce
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nty
Table II.
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management needs to pay close attention to the certainty and uncertainty levels inthe parameters, structures, and processes related to supply chains (as described in thebottom row of Table II). If the certainty level is low (e.g. procedural uncertainty) withregard to a major event, there is a need for activities that enhance it, or the organisationneeds otherwise to accept the consequences of being exposed to a level of uncertainty.When the uncertainty increases, the risk management activities should be directedmore and more towards making sense of the situation and of risk events themselves,as the level of subjectivity and intuition rises. Therefore, it is relevant to understandboth the level of objective information and the understanding used in subjectivedecision making in the supply chain risk management context.
5. Discussion and implicationsSupply chains have become very long and complex, with many parallel physical andinformation flows to ensure that products are delivered in the right quantities, to theright place, in a cost-effective manner (Juttner, 2005). At the same time, they are becomingmore and more vulnerable to serious disturbances. In line with these developments,supply chain risk management and the uncertainty related to it are assumingincreasingly important roles. However, the concept of uncertainty is fuzzier in the area ofsupply chain risk management than in many other disciplines, a research gap that hasbeen identified in some existing studies (Tang and Nurmaya Musa, 2010; Sorensen,2005). In fact, in a recent systematic literature review (Ghagde et al., 2012), it wassuggested that further research is needed to better understand the visibility andtraceability of risks, which is still an underdeveloped area in the field of supply chain riskmanagement. Therefore, in order to enhance understanding on these issues, we proposea conceptual framework and offer implications illustrating the various levels ofuncertainty in the supply chain context. We categorise the level of uncertainty in moredetail than in previous studies, which enables the construction of a more effective andrealistic risk management strategy with a better understanding of the level of knowninformation and the nature of uncertainty related to it.
5.1 Implications for the literature on supply risk managementCurrently, supply chain risk management tends to assess risks as if they were based onobjective measures (e.g. Bogataj and Bogataj, 2007; Yang, 2011), which in this paper werefer to as probabilistic certainty. However, in reality this objective basis is rarelythe case. Therefore, the measures derived from such assessments may well be based onsubjective beliefs, and thus should be treated as such. This carries major implicationsin terms of risk management and risk analysis in supply and logistics chainsand networks.
The current contributions on uncertainty in supply chain risk management arestill quite scarce, and only a few scholars have studied the phenomenon. Typically, thepresented frameworks (e.g. Mason-Jones and Towill, 1998; Wilding, 1998; Prater et al.,2001; Sanchez-Rodrigues et al., 2008; Van der Vorst and Beulens, 2002) concentrate onstudying the identification of and controlling the uncertainty from different parts of thesupply chain process, as well as studying the effectiveness implications. However,these studies do not address in detail the nature of uncertainty itself. Thus, a gap canbe identified in the current body of knowledge, and this is the gap at which the coreargument of this study aims. There is, however, some work that comes close to ouraims here. For example, in the project management context, De Meyer et al. (2002)underline the need for a better understanding of uncertainty, and analyse the degree of
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what is known and what can be planned and done based on that. Similarly, we analysethe uncertainty in the supply chain risk management domain from the perspectiveof the decision maker, and we concentrate on the level of knowledge that can be usedfor the basis of identification, analysis, and management of the uncertain events.
In building our argument, we have combined various theories of uncertainty(Knight, 1921; Dosi and Egidi, 1991) in the context of supply chain risk management.The levels of uncertainty presented in the developed framework range between completecertainty and complete (radical) uncertainty. In particular, risk is inherent in uncertainty(i.e. probabilistic certainty), whereas, in the literature, uncertainty is commonly seenas inherent in risk. The view presented here thus differs from that expressed in themainstream literature in that regard, and it facilitates deeper exploration of the conceptof uncertainty and its implications.
Our uncertainty framework for supply chain risk management contributes tothe existing literature in two distinct ways. First, it illustrates the different levels ofuncertainty and therefore enhances understanding of its nature when risks areassessed and managed. This could help researchers in the field to better assess theavailable information on risks, and on this basis to make stronger recommendationswith regard to how such risks should be managed. There is existing literatureaddressing the different levels of uncertainty in the project management context(e.g. De Meyer et al., 2002; Ward and Chapman, 2003). In addition, there is researchfocusing on uncertainty in terms of its sources such as demand and forecastinguncertainty (Prater et al., 2001), as well as on the generic influence factors on the level ofuncertainty (Prater, 2005). Complementing these approaches, our work takes one stepfurther in explicating the nature of certainty and uncertainty in the supply managementcontext through the lenses of parametric, structural, and procedural dimensions.This allows for even more in-depth inquiry into the nature of the phenomenon, helping tograsp its dimensions as well as their interrelations. Thus, as the existing frameworkstreat uncertainty mostly as a one-dimensional phenomenon and identify its sources andimplications (Mason-Jones and Towill, 1998; Prater et al., 2001; Sanchez-Rodrigues et al.,2008), our study can be used to complement these frameworks by illustrating the natureof different uncertainty types and levels. Second, the framework carries implications fordecision making under various levels of uncertainty, which should help decision makersto design better information and other support systems in and beyond the contextin question (see e.g. Mansouri et al., 2012). In particular, in focusing on the type ofknowledge the decision maker has or lacks, it highlights the potential strong points aswell as the shortcomings in the decision-making process.
5.2 Practical implicationsIn practical terms, analyses of the nature of uncertainty could provide crucial informationfor supply chain risk management and therefore could enable more efficient and effectiveimplementation. The framework opens up new insights and could be useful in the riskmitigation process to organisations attempting to assess their vulnerability to differentexogenous and endogenous events.
In particular, the better that management understands the nature of uncertainty,the easier it is to allocate resources related to supply chain risk more effectively.When uncertainties concerning an important event are more procedural in nature,more resources should be allocated to providing more clarification. Despite theinevitable restrictions on the possibility of reducing uncertainty, resource allocationand information gathering will ease at least some of it. An organisation making such
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decisions should examine the cost/benefit implications of accepting certain levels ofuncertainty or investing in lowering the level when necessary. In fact, a multidimensionalmanagement approach for supply risk management has been suggested in order toeffectively and efficiently handle various types of risks in the firms supply chain (Chopraand Sodhi, 2004; Kleindorfer and Saad, 2005). Utilising the uncertainty types introducedin this study may help decision makers in further assessing the best possible riskmitigation activities and processes.
Finally, the existing practice-oriented models for supply chain risk managementframeworks, whether they deal with uncertainty, risk, or vulnerability (see e.g. Waters,2007; Kleindorfer and Saad, 2005; Sheffi, 2005; Ritchie and Brindley, 2007; Manuj andMentzer, 2008) aim to determine the optimal cost/benefit approach in the managingof the unwanted events. Our framework has the possibility of extending these byillustrating to managers what is in fact known (or not known) about the particularevents, thus allowing more purposeful and precise use of the frameworks according tothe information available.
5.3 Further research directionsThe illustrated framework linking theories of uncertainty to the supply chain contextis novel, and therefore one goal of this study was to act as a catalyst triggering furtherresearch. Future studies could both improve and test the argument provided here.Given that the framework is conceptual, it needs to be empirically tested and validatedby the academic community in further research endeavours. Such studies could use itto analyse a certain type of event with a large dataset, for instance, in which the level ofuncertainty is assessed against the performance effectiveness of supply chain riskmanagement. It would also be useful to conduct qualitative studies exploring varioustypes of processes related to decision making under different levels of uncertainty.
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Further reading
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About the authors
Dr Jyri Vilko (DSc Econ and Bus Adm, MSc, Tech) is a Post-Doctoral Researcher in the School ofBusiness at the Lappeenranta University of Technology, Finland. His recent research interestsare in the areas of supply chain risk management, inter-firm relations, operations research andoutsourcing. He has published on these topics in high-quality academic journals such asInternational Journal of Production Economics and International Journal of Shipping andTransport Logistics. He has also been involved in business practice with regard to these topicsthrough his research, and in speaker and advisory roles. Previously he worked as a ProjectManager in the project STOCA studying risk in the cargo flows of Gulf of Finland in emergencysituations. Dr Jyri Vilko is the corresponding author and can be contacted at: [email protected]
Dr Paavo Ritala (DSc Econ and Bus Adm) is a Post-Doctoral Researcher in the School of Businessand a Research Manager in the Technology Business Research Center at the Lappeenranta Universityof Technology. His recent research interests are in the areas of inter-organisational networks, businessmodels, innovation and coopetition (collaboration between competing firms). He has published onthese topics in high-quality academic journals such as Journal of Product Innovation Management,British Journal of Management & Technovation. He has also been involved in business practice withregard to these topics through his research, and in speaker and advisory roles.
Dr Jan Edelmann (DSc, Econ and Bus Adm) is currently working in the private sector.His research interests include innovation management, investment decision-making and strategy.
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1. R. Rajesh, V. Ravi, R. Venkata Rao. 2014. Selection of risk mitigation strategy in electronic supplychains using grey theory and digraph-matrix approaches. International Journal of Production Research 1-20.[CrossRef]
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