Methodology for uncertainty characterization of performance measures

2016 ◽  
Vol 33 (9) ◽  
pp. 1346-1363 ◽  
Author(s):  
Isabel Silva Lopes ◽  
Sérgio Dinis Sousa ◽  
Eusébio Nunes

Purpose The purpose of this paper is to present a methodology to represent the uncertainty generated in performance measures (PMs) during the operational step or “use step” of the performance measurement process (PMP). The different steps of the methodology are described and exemplified through an application example. Design/methodology/approach An index that reflects the level of uncertainty originated by the factors and the strength of their inter-relationships is developed through the use of graph theory. A graph is developed considering all sources or factors of uncertainty that may be present in this process. Based on the graph, the methodology includes the use of a matrix and the determination of the associated permanent function which is used for determining the uncertainty index. Findings During the development of the methodology, it was found that the use of a scale that includes zero for assigning values of the elements of the matrix is not appropriate when using graph theory and permanent function calculation, since in this case the permanent function is insensible to changes in some matrix elements. Originality/value This paper identifies all the sources that can affect the quality of performance measurement values during the operational step of the PMP and proposes a method to characterize the strength of this uncertainty. Beyond alerting decision makers to the level of uncertainty associated with a PM, it also allows defining appropriate actions to improve PMs’ quality.

2019 ◽  
Vol 27 (7) ◽  
pp. 2130-2147 ◽  
Author(s):  
Marcio C. Machado ◽  
Renato Telles ◽  
Paulo Sampaio ◽  
Maciel M. Queiroz ◽  
Ana Cristina Fernandes

Purpose The purpose of this paper is to present a conceptual framework for performance measurement (PM) for the integration of supply chain management (SCM) and quality management (QM). Design/methodology/approach A systematic literature review on SCM and QM was conducted to develop key performance measures related to six areas of integration between QM and SCM: leadership; continuous improvement and innovation; sustainability performance; stakeholders; information system; and management and strategic planning. Findings Supported by the literature concerning to supply chain quality management (SCQM) integration, a set of nine propositions about performance measures, that contribute to the integration of SCQM, were developed. Originality/value This study contributes to QM practices within a supply chain environment from an integrated perspective. Additionally, the propositions have significant implications from both managerial and theoretical perspectives. This study also extends the concept of supply chain quality integration by focusing on key aspects of PM that may help to improve the overall performance of the supply chain.


Author(s):  
Sean Keane ◽  
Karmun Cheng ◽  
Kaitlyn Korol

In-line inspection (ILI) tools play an important role within integrity management and substantial investment is made to continuously advance performance of the existing technologies and, where necessary, to develop new technologies. Performance measurement is typically focused for the purpose of understanding the measured performance in relation to the ILI vendor specification and for the determination of residual uncertainty regarding pipeline integrity. These performance measures may not provide the necessary insight into what type of investment into a technology is necessary to further reduce residual uncertainty regarding pipeline integrity, and beyond that, what investment, as an operator, results in an effective and efficient reduction in uncertainty. The paper proposes a reliability based approach for investigating uncertainty associated with ultrasonic crack ILI technology for the purpose of identifying efficient investment into the technology that results in an effective and measurable improvement. Typical performance measures and novel performance measurement methods are presented and reviewed with respect to what information they can provide to assist in investment decisions. Finally, general observations are made regarding Enbridge’s experience using ultrasonic crack ILI technology and areas currently being investigated.


2018 ◽  
Vol 201 (1) ◽  
Author(s):  
Donald Oliver

ABSTRACTCharacterization of Sec-dependent bacterial protein transport has often relied on anin vitroprotein translocation system comprised in part ofEscherichia coliinverted inner membrane vesicles or, more recently, purified SecYEG translocons reconstituted into liposomes using mostly a single substrate (proOmpA). A paper published in this issue (P. Bariya and L. Randall, J Bacteriol 201:e00493-18, 2019, https://doi.org/10.1128/JB.00493-18) finds that inclusion of SecA protein during SecYEG proteoliposome reconstitution dramatically improves the number of active translocons. This experimentally useful and intriguing result that may arise from SecA membrane integration properties is discussed here. Furthermore, determination of the rate-limiting transport step for nine different substrates implicates the mature region distal to the signal peptide in the observed rate constant differences, indicating that more nuanced transport models that respond to differences in protein sequence and structure are needed.


2017 ◽  
Vol 18 (2) ◽  
pp. 208-222 ◽  
Author(s):  
Sulaiman Abdullah Saif Al-Nasser Mohammed ◽  
Datin Joriah Muhammed

Purpose The purpose of this paper is to investigate the performance of Islamic banks in developing countries from 2007 to 2010 which includes the period of the financial crisis by empirically examining the way in which the macroeconomy affected Islamic banking performance (IBP) in developing countries. The empirical examination involves two approaches of measuring performance: Sharia-based and conventional-based performance measurement. Design/methodology/approach For this paper, the authors have utilized a Data Stream/Bank Scope database and data from the Bank Negara Malaysia (Malaysian Central Bank) to collect a panel set of annual financial information for Islamic banking from the year 2007-2010. The initial sample covers 34 Islamic banks from developing countries that are listed on the International Islamic Service Board. Furthermore, the authors adopted only those listed Islamic banks to tackle the data availability issue. The authors’ final sample comprised 136 observations with complete data as the numbers of Islamic banks in developing countries are low in comparison to their conventional peers. The financial crisis dummy follows America’s commonly used National Bureau of Economic Research timeline for the financial crisis. The authors also used the method of a generalized least square (GLS) method of pooled panel data analysis regression model. The rationale for employing the GLS technique was made on the basis of the ability of GLS to give less weight to the error term that is closely clustered around the mean, to improve the goodness of fit and to remove autocorrelation compared with normal, random, and fixed effect models. Findings The authors of this paper found that the macroeconomic factors reflected in gross domestic product, gross domestic product growth, and inflation rate have a significant positive relationship with the return on assets. In addition, a significant negative relationship was found between the financial dummy and IBP in developing countries. On the other hand, it failed to find evidence of a relationship between the macroeconomic factors and performance including the legal system and the financial crisis dummy, when the performance is reflected by the Zakat ratio. The result embedded that the financial crisis had an impact on the performance of Islamic banks in developing countries when viewed from the conventional banking perspective. The financial crisis played a role in reducing the profitability of Islamic banks which is consistent with a previous study by Hasan and Dridi (2011). However, in the view of Sharia, the financial crisis did not have any effect on IBP; even the macro factors did not have any effect on the level of performance. Research limitations/implications There are possible explanations for these contradictory coefficient signs. First, the contradictory signs of the coefficient for the same independent variable that was regressed with different dependent variables show that researchers would need to take caution in using the right indicators when measuring IBP. Conventional indicators bring different results in comparison to Islamic indicators (Badreldin, 2009; Mudiarasan. Kuppusamy, 2010; Zahra and Pearce, 1989). Second, Richard et al. (2009), having reviewed performance measurement-related publications in five of the leading management journals (722 articles between 2005 and 2007), suggested that the past studies reveal a multidimensional conceptualization of organizational performance with limited effectiveness of commonly accepted measurement practices. Accordingly, these studies call for more theoretically grounded research and debate for establishing which measures are appropriate in a given research context. Today, there is a general consensus that the old financial measures are still valid and relevant (Yip et al., 2009). However, these need to be balanced with more contemporary, intangible, and externally oriented measures. It has been argued that various researchers working in their own disciplines using functional performance measures (such as market share in marketing, schedule adherence in operations and so on) ought to link their discipline to focused performance measures of overall organizational performance. Practical implications Islamic banking has unique characteristics in comparison to conventional banking and this paper examines the differences between the two and also investigates the resilience of Islamic banks during a period of economic turbulence. Furthermore, due to these unique characteristics, a comparison cannot be made by using the conventional performance measures alone. In addition, amid the in-depth studies examining the resilience of Islamic banks during periods of economic crises, there are instances of theoretical disagreement in the extant empirical literature examining finance and economics. In that regard, the majority of the existing literature is either based on advanced markets or countries where the majority of the population practices the faith of Islam, and little is known about the performance of Islamic banking from the pooled emerging markets; particularly in developing countries. Originality/value Introducing Zakat as a performance measurement in Islamic banking context relating it to macroeconomic factors enhances the thinking of new research in Islamic theory about bank performance.


2014 ◽  
Vol 34 (7) ◽  
pp. 853-875 ◽  
Author(s):  
Bedanand Upadhaya ◽  
Rahat Munir ◽  
Yvette Blount

Purpose – The purpose of this paper is to investigate the role of performance measurement systems in organisational effectiveness in the context of the financial services sector within a developing country. Design/methodology/approach – Using the mail survey method data were collected from 69 financial institutions operating in Nepal. Multivariate analysis, in particular multiple regression analysis was employed to test the hypotheses. Findings – The results suggest that non-financial measures and feedback are tightly intertwined with organisational effectiveness. While institutions are focused on using the performance measures concerning internal business process perspective, less emphasis is placed on using customer and employee-related performance measures because they are considered less significant to organisational effectiveness. The findings also reveal that strategy-related feedback is considered more critical by management, as opposed to performance and staff. The study also provides evidence that 40.58 per cent of the financial institutions in Nepal had implemented the Balanced Scorecard, which is considered to be high when compared with other developing countries. Practical implications – The findings provide managers with valuable insights pertaining to the role of non-financial performance measures and the importance of feedback in improving organisational effectiveness, which could assist them in (re) aligning their performance measurement practices. Originality/value – The findings of this study contributes to the limited management accounting literature on performance measurement and the impact on organisational effectiveness by providing evidence from the financial services sector within the context of a developing country.


1979 ◽  
Vol 51 (2) ◽  
pp. 229-233 ◽  
Author(s):  
Eugen J. Dolan ◽  
Charles H. Tator

✓ A new method is described for the determination of force-distance curves for aneurysm clips. A dissecting microscope with a goniometer eyepiece was used to determine the angle between the clip blades as various forces were applied to open the clip. The cosine law was then used to calculate the force-distance curves. The method allows accurate characterization of different clips and is especially useful for the early detection of clip weakening.


2017 ◽  
Vol 61 (3) ◽  
Author(s):  
Laurent Dortet ◽  
Delphine Girlich ◽  
Anne-Laure Virlouvet ◽  
Laurent Poirel ◽  
Patrice Nordmann ◽  
...  

ABSTRACT The metallo-β-lactamase NDM-1 is among the most worrisome resistance determinants and is spreading worldwide among Gram-negative bacilli. A bleomycin resistance gene, ble MBL, downstream of the bla NDM-1 gene has been associated with resistance almost systematically. Here, we characterized the corresponding protein, BRPMBL, conferring resistance to bleomycin, an antitumoral glycopeptide molecule. We have determined whether the expression of the bla NDM-1-ble MBL operon is inducible in the presence of carbapenems and/or bleomycin-like molecules using quantitative reverse transcription-PCR (qRT-PCR), determination of imipenem and zeocin MICs, and carbapenemase-specific activity assays. We showed that the bla NDM-1-ble MBL operon is constitutively expressed. Using electrophoretic mobility shift and DNA protection assays performed with purified glutathione S-transferase (GST)-BRPMBL, we demonstrated that BRPMBL is able to bind and sequester bleomycin-like molecules, thus preventing bleomycin-dependent DNA degradation. In silico modeling confirmed that the mechanism of action required the dimerization of the BRPMBL protein in order to sequester bleomycin and prevent DNA damage. BRPMBL acts specifically on bleomycin-like molecules since cloning and expression of ble MBL in Staphyloccoccus aureus did not confer cross-resistance to any other antimicrobial glycopeptides such as vancomycin and teicoplanin.


1989 ◽  
Vol 170 ◽  
Author(s):  
Juan C. Figueroa ◽  
Linda S. Schadler ◽  
Campbell Laird

AbstractThe effect of fiber surface treatments on the relationship between the tensile strength of a filament and the shear strength of its interphase is one of the central issues facing composite materials technologists today. We demonstrate here that analysis of fragmentation phenomena in monofilament composites can simultaneously yield information about these two parameters. Characterization of shear stress transfer zones in non-critical fragments has led us to the determination of interphase strength.A phenomenological treatment that highlights the role of the matrix in the fragmentation process is presented here. This analysis considers issues such as the strain energy exchange between a failing fiber and the matrix, as well as interphase relaxation due to the viscoelastic nature of the matrix. Our observations of the fragmentation phenomena in AU4/polycarbonate monofilament composites indicate that the fiber/matrix interaction in this system is governed by micromechanical locking.


2015 ◽  
Vol 53 (6) ◽  
pp. 1812-1822 ◽  
Author(s):  
Giorgia Valsesia ◽  
Malgorzata Roos ◽  
Erik C. Böttger ◽  
Michael Hombach

In this study, we introduce a new approach for determination of epidemiologic cutoffs (ECOFFs) and resistant-population cutoffs (RCOFFs) based on receiver operating characteristic (ROC) curves. As an example, the method was applied for determination of ECOFFs for seven different beta-lactam antibiotics and wild-type populations ofEscherichia coli,Klebsiella pneumoniae, andEnterobacter cloacae. In addition, RCOFFs were determined for bacterial populations with defined resistance mechanisms (“resistotypes”), i.e., extended-spectrum beta-lactamase (ESBL)-positiveE. coli, ESBL-positiveK. pneumoniae, and ESBL-positiveE. cloacae; AmpC cephalosporinase-positiveE. coliand AmpC-positiveK. pneumoniae; and broad-spectrum beta-lactamase (BSBL)-positiveE. coli. RCOFFs and ECOFFs are instrumental for a systematic characterization of associations between resistotypes and wild-type populations.


2015 ◽  
Vol 5 (4) ◽  
pp. 395-423 ◽  
Author(s):  
Mohamed Hegazy ◽  
Myada Tawfik

Purpose – The purpose of this paper is to investigate challenges facing auditing firms in designing and measuring their performance and discusses why and how the balance scorecard (BSC) could support the auditing firms overcome such challenges. The paper contributes to the existing literature by identifying the peculiarity of the auditing firms in designing and implementing performance measurement systems including the need for sound and advanced information systems, subjectivity embedded in measuring customer satisfaction, growth and success of the firms and restrictions imposed by regulations and auditing standards for the provision of non-audit services which may increase the firms’ revenues and profits to help maintain high-quality outputs. Also, the paper provided evidence for the use of non-financial measures in service industry in particular for customers and finance. The unique dilemma in the auditing firms to provide services to satisfy customers yet maintaining distance and independence from them represent an important research question requiring investigation and study. Design/methodology/approach – A review of the literature for performance evaluation in general and in particular BSCs in service industries was made to identify challenges facing auditing firms when measuring their performance. Data were collected using case study approach; two auditing firms, one of the Big 4 and a medium size auditing firm with international affiliation operating in the Egyptian market were selected. Interviews, document analysis and participant observations were used in the analysis of each firm performance measurement system. Findings – The paper suggests that major challenges face auditing firms in measuring their performance mainly the size of the firm and its affiliation with international auditing firm, the qualification and experience of partners and audit managers needed for the design and implementation of a BSC or similar performance measures, the resources required for the introduction of such performance measure and the peculiarity of the auditor and client relationship with the need to maintain independence and confidentiality while providing high-quality services. Although both auditing firms being studied have formal performance measurement systems, they differ in their degree of comprehensiveness. In particular, the performance measurement system of the larger firm is more elaborate than that of the smaller one and both place more emphasis on qualitative measures such as learning and growth and internal business processes than financial measures. Research limitations/implications – Overall, the results have implications for understanding the performance measurement process of auditing firms in general and in particular in an emerging economy such as Egypt. The identification of the challenges facing auditing firms in measuring their performance and how the implementation of BSC can help partners and employees to overcome those challenges will add to the literature for performance evaluation in service companies. Future research should be carried to compare and assess differences between the behavioural aspects of performance measures in auditing firms and possible application of BSC in such firms and those used in services industry. Also, the practicality of implementing a BSC measures for different auditing firms should be investigated further in future research. Originality/value – The research among the first to investigate the challenges facing auditing firms in designing and operating a performance measurement system and to discuss, using case studies, how a BSC could support the auditing firms to overcome such challenges. Further, the research provides insights into performance measures in auditing firms in developing economies like Egypt which are sparse since most studies have been conducted in developed economies. Also, the paper enriches the literature of performance measurement systems in service rather than the manufacturing sector especially for medium and small size firms.


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