This page has only limited features, please log in for full access.

Prof. Toni Lupo
Department of Engineering, Università degli Studi di Palermo, 90128 Palermo, Italy

Basic Info

Basic Info is private.

Research Keywords & Expertise

0 Performance Measurement
0 Statistical process control
0 Service Quality Management
0 Industrial Quality Management
0 Maintenance Optimization

Fingerprints

Statistical process control
Performance Measurement
Service Quality Management
Maintenance Optimization

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 15 January 2020 in Computers & Industrial Engineering
Reads 0
Downloads 0

Nowadays, both continuous and discontinuous operating systems require higher and higher reliability levels in order to avoid the occurrence of dangerous or even disastrous consequences. Accordingly, the definition of appropriate maintenance policies and the identification of components to be maintained during the planned system’s downtimes are fundamental to ensure the reliability maximization. Therefore, the present paper proposes a mathematical programming formulation of the selective maintenance problem with the aim to maximize the system’s reliability under an uncertain environment. Specifically, the aleatory model related to the components’ failure process is well known, whereas some model parameters are affected by epistemic uncertainty. Uncertain parameters are hence gathered from experts in an interval form, and the Dempster-Shafer Theory (DST) of evidence is proposed as a structured methodology to properly deal with the interval-valued experts’ opinions. An exact and efficient algorithm is finally used to solve the optimization model.

ACS Style

Giacomo Maria Galante; Concetta Manuela La Fata; Toni Lupo; Gianfranco Passannanti. Handling the epistemic uncertainty in the selective maintenance problem. Computers & Industrial Engineering 2020, 141, 106293 .

AMA Style

Giacomo Maria Galante, Concetta Manuela La Fata, Toni Lupo, Gianfranco Passannanti. Handling the epistemic uncertainty in the selective maintenance problem. Computers & Industrial Engineering. 2020; 141 ():106293.

Chicago/Turabian Style

Giacomo Maria Galante; Concetta Manuela La Fata; Toni Lupo; Gianfranco Passannanti. 2020. "Handling the epistemic uncertainty in the selective maintenance problem." Computers & Industrial Engineering 141, no. : 106293.

Journal article
Published: 01 November 2019 in Computers & Industrial Engineering
Reads 0
Downloads 0
ACS Style

Toni Lupo; Elvira Bellomo. DINESERV along with fuzzy hierarchical TOPSIS to support the best practices observation and service quality improvement in the restaurant context. Computers & Industrial Engineering 2019, 137, 1 .

AMA Style

Toni Lupo, Elvira Bellomo. DINESERV along with fuzzy hierarchical TOPSIS to support the best practices observation and service quality improvement in the restaurant context. Computers & Industrial Engineering. 2019; 137 ():1.

Chicago/Turabian Style

Toni Lupo; Elvira Bellomo. 2019. "DINESERV along with fuzzy hierarchical TOPSIS to support the best practices observation and service quality improvement in the restaurant context." Computers & Industrial Engineering 137, no. : 1.

Journal article
Published: 01 January 2018 in Journal of Cleaner Production
Reads 0
Downloads 0

An innovative combined evaluation approach is proposed in the present paper to deal with the issue of\ud the performance measurement and comparison of Urban Waste Management (UWM) services in the\ud context of cities. The ELECTRE III method is initially considered as tool able to execute a multi-criteria\ud analysis aimed at ranking UWM systems based on their integration and sustainability levels. The\ud latter are comprehensively evaluated via the recently developed “Wasteaware” Integrated and Sustainability\ud Waste Management indicators framework, which takes into account physical components and\ud governance aspects of UWM systems. Then, on the basis on ELECTRE III results, a practical gaps investigation\ud is developed to comparatively highlight service weaknesses to be addressed to pursue more\ud equity concerning integration and sustainability in the considered context. The issue is particularly\ud relevant in light of the multi-dimensional nature and the substantial complexity of UWM systems, as\ud well as for the high criticality level assumed by these systems in recent years. The proposed combined\ud evaluation approach is applied to an empirical case which regards the UWM systems of the Optimal\ud Territorial Ambit of Palermo (Sicily). In the considered context, results highlight how stakeholders'\ud participation in decision-making activities represents a crucial factor to pursue shared and coordinated\ud strategies in line with integration and sustainability principles. Moreover, seventeen measures involving\ud operational, environmental, socio-economic as well as administrative waste management aspects are\ud selected from a comprehensive list of measures aimed at waste management integration and sustainability,\ud and then implemented in the investigated context. Through these measures, the resulting services\ud criticalities can be evaluated and properly addressed, and new required processes can be designed

ACS Style

Toni Lupo; Massimiliano Cusumano. Towards more equity concerning quality of Urban Waste Management services in the context of cities. Journal of Cleaner Production 2018, 171, 1324 -1341.

AMA Style

Toni Lupo, Massimiliano Cusumano. Towards more equity concerning quality of Urban Waste Management services in the context of cities. Journal of Cleaner Production. 2018; 171 ():1324-1341.

Chicago/Turabian Style

Toni Lupo; Massimiliano Cusumano. 2018. "Towards more equity concerning quality of Urban Waste Management services in the context of cities." Journal of Cleaner Production 171, no. : 1324-1341.

Article
Published: 21 November 2017 in Health Care Management Science
Reads 0
Downloads 0

A novel fuzzy-based approach which combines ELECTRE III along with the Importance-Performance Analysis (IPA) is proposed in the present work to comparatively evaluate the service quality in the public healthcare context. Specifically, ELECTRE III is firstly considered to compare the service performance of examined hospitals in a noncompensatory manner. Afterwards, IPA is employed to support the service quality management to point out improvement needs and their priorities. The proposed approach also incorporates features of the Fuzzy Set Theory so as to address the possible uncertainty, subjectivity and vagueness of involved experts in evaluating the service quality. The model is applied to five major Sicilian public hospitals, and strengths and criticalities of the delivered service are finally highlighted and discussed. Although several approaches combining multi-criteria methods have already been proposed in the literature to evaluate the service performance in the healthcare field, to the best of the authors’ knowledge the present work represents the first attempt at comparing service performance of alternatives in a noncompensatory manner in the investigated context.

ACS Style

Concetta Manuela La Fata; Toni Lupo; Tommaso Piazza. Service quality benchmarking via a novel approach based on fuzzy ELECTRE III and IPA: an empirical case involving the Italian public healthcare context. Health Care Management Science 2017, 22, 106 -120.

AMA Style

Concetta Manuela La Fata, Toni Lupo, Tommaso Piazza. Service quality benchmarking via a novel approach based on fuzzy ELECTRE III and IPA: an empirical case involving the Italian public healthcare context. Health Care Management Science. 2017; 22 (1):106-120.

Chicago/Turabian Style

Concetta Manuela La Fata; Toni Lupo; Tommaso Piazza. 2017. "Service quality benchmarking via a novel approach based on fuzzy ELECTRE III and IPA: an empirical case involving the Italian public healthcare context." Health Care Management Science 22, no. 1: 106-120.

Article
Published: 06 September 2017 in Telecommunication Systems
Reads 0
Downloads 0

A novel two-step knowledge-based exploratory framework is proposed in this paper for studying quality of Italian mobile telecommunication services (MTSs). Particularly, the Delphi technique is initially considered to finalize an overall quality structure of MTSs features, indicators and drivers, herein described on the basis of a comprehensive review of the fundamental references for the field, and also to select the key elements with reference to the Italian context. At the second step, selected key elements are prioritized via the analytic hierarchical process method according to viewpoints of the fundamental stakeholders for the sector. Furthermore, possible uncertainty and ambiguity of involved experts at this step of the study are addressed via a linguistic comparison scale represented by fuzzy numbers. Results of the first step revealed that the quality structure of Italian MTSs includes 15 key indicators with reference to four key MTSs quality features and seven key drivers. On the other hand, results of the second step pointed out that tangible aspects represents the fundamental key MTSs quality feature, whereas network population coverage, price of data services, and internet network performance represent the crucial key indicators. In addition, technological resources and technological innovation as well as informational resources constitute the most important key quality drivers of Italian MTSs. Obtained results may be of interest for MTSs managers and decision makers as well researchers of the field offering important suggestions as to how to evaluate and improve quality of MTSs.

ACS Style

Toni Lupo; Seyyed Ali Delbari. A knowledge-based exploratory framework to study quality of Italian mobile telecommunication services. Telecommunication Systems 2017, 68, 129 -144.

AMA Style

Toni Lupo, Seyyed Ali Delbari. A knowledge-based exploratory framework to study quality of Italian mobile telecommunication services. Telecommunication Systems. 2017; 68 (1):129-144.

Chicago/Turabian Style

Toni Lupo; Seyyed Ali Delbari. 2017. "A knowledge-based exploratory framework to study quality of Italian mobile telecommunication services." Telecommunication Systems 68, no. 1: 129-144.

Article
Published: 06 July 2017 in Journal of the Association for Information Science and Technology
Reads 0
Downloads 0

A conceptual model of the Academic Library (AL) service quality is hypothesized in the present article, and then validated and analyzed by a novel evaluation approach. Specifically, the conceptual model integrates the fundamental attributes of the canonical AL service together with those more relevant of the new and widely considered AL Electronic Service (e-services). As concerns the evaluation approach, it incorporates the Fuzzy Sets Theory (FST) so as to deal with the students' uncertainty over their own judgments on the AL service quality and a Structural Equation Model (SEM) to validate the conceptual model and to determine the key drivers of the AL service quality. The effectiveness of the proposed approach is proved by an empirical study concerning the AL of the Polytechnic School of the University of Palermo (Italy). Data collected via a survey involving more than 600 students are used, and the key drivers of the AL service quality are found out. Particularly, the obtained results reveal that Collections and materials represents the main driver of the AL service quality followed by Infrastructure and Access to the service, whereas Staff plays the fundamental role of interface between AL service aspects and students' needs and necessities.

ACS Style

Concetta Manuela La Fata; Toni Lupo. A combined fuzzy-SEM evaluation approach to identify the key drivers of the academic library service quality in the digital technology era: An empirical study. Journal of the Association for Information Science and Technology 2017, 68, 2425 -2438.

AMA Style

Concetta Manuela La Fata, Toni Lupo. A combined fuzzy-SEM evaluation approach to identify the key drivers of the academic library service quality in the digital technology era: An empirical study. Journal of the Association for Information Science and Technology. 2017; 68 (10):2425-2438.

Chicago/Turabian Style

Concetta Manuela La Fata; Toni Lupo. 2017. "A combined fuzzy-SEM evaluation approach to identify the key drivers of the academic library service quality in the digital technology era: An empirical study." Journal of the Association for Information Science and Technology 68, no. 10: 2425-2438.

Journal article
Published: 01 March 2016 in Applied Soft Computing
Reads 0
Downloads 0

A novel fuzzy evaluation framework is applied in this study to evaluate service quality in the public healthcare sector. In particular, the proposed framework is based on the ServQual disconfirmation paradigm and incorporates the Analytic Hierarchy Process (AHP) method to elicit reliable estimations of service quality expectations. Moreover, degrees of uncertainty, subjectivity and vagueness on the part of stakeholders are addressed via linguistic evaluation scales parameterized by triangular fuzzy numbers. With reference to nine relevant public hospitals in the Sicilian Region (Italy), a detailed case study evaluating four core service criteria and 15 fundamental service items is conducted so as to discern dissatisfying aspects regarding the public healthcare service in the Region. Dissatisfaction reasons with the provided service are identified in the analysis as well, further demonstrating the effectiveness of the proposed approach

ACS Style

Toni Lupo. A fuzzy framework to evaluate service quality in the healthcare industry: An empirical case of public hospital service evaluation in Sicily. Applied Soft Computing 2016, 40, 468 -478.

AMA Style

Toni Lupo. A fuzzy framework to evaluate service quality in the healthcare industry: An empirical case of public hospital service evaluation in Sicily. Applied Soft Computing. 2016; 40 ():468-478.

Chicago/Turabian Style

Toni Lupo. 2016. "A fuzzy framework to evaluate service quality in the healthcare industry: An empirical case of public hospital service evaluation in Sicily." Applied Soft Computing 40, no. : 468-478.

Journal article
Published: 01 June 2015 in American Journal of Applied Sciences
Reads 0
Downloads 0

A New Innovative Cooling Law for Simulated Annealing Algorithms

ACS Style

Antonella Certa; Toni Lupo; Gianfranco Passannanti. A New Innovative Cooling Law for Simulated Annealing Algorithms. American Journal of Applied Sciences 2015, 12, 370 -381.

AMA Style

Antonella Certa, Toni Lupo, Gianfranco Passannanti. A New Innovative Cooling Law for Simulated Annealing Algorithms. American Journal of Applied Sciences. 2015; 12 (6):370-381.

Chicago/Turabian Style

Antonella Certa; Toni Lupo; Gianfranco Passannanti. 2015. "A New Innovative Cooling Law for Simulated Annealing Algorithms." American Journal of Applied Sciences 12, no. 6: 370-381.

Journal article
Published: 01 April 2015 in American Journal of Applied Sciences
Reads 0
Downloads 0
ACS Style

Toni Lupo; Filippo Sgroi. Optimal Pareto Solutions of a Dynamic C Chart: An Application of Statistical Process Control on a Semiconductor Devices Manufacturing Process. American Journal of Applied Sciences 2015, 12, 254 -261.

AMA Style

Toni Lupo, Filippo Sgroi. Optimal Pareto Solutions of a Dynamic C Chart: An Application of Statistical Process Control on a Semiconductor Devices Manufacturing Process. American Journal of Applied Sciences. 2015; 12 (4):254-261.

Chicago/Turabian Style

Toni Lupo; Filippo Sgroi. 2015. "Optimal Pareto Solutions of a Dynamic C Chart: An Application of Statistical Process Control on a Semiconductor Devices Manufacturing Process." American Journal of Applied Sciences 12, no. 4: 254-261.

Journal article
Published: 17 February 2015 in International Journal of Reliability, Quality and Safety Engineering
Reads 0
Downloads 0

In recent years, a variety of enhanced schemes for the c chart have been developed aimed at the effectiveness improving of the related statistical process control (SPC) procedures. However, the performance of such chart schemes can be very sensitive to values assumed for some operating and cost parameters, in particular to the considered process shift magnitude arising from out-of-control conditions. In such a circumstance, the effectiveness of such chart schemes can be subjected to substantial reductions when they are implemented in operative contexts given that, in practice, such value is unknown and it can be very difficult to accurately estimate. For this reason, in the present paper it is developed an economic optimization approach able to find out the optimal configurations of the main adaptive c chart schemes. Subsequently, economic performances of such configurations are compared in order to derive information on their relative economic robustness, considering the difference between the estimated process shift magnitude and the actual one as influential factor and costs arising from the related SPC operations as performance comparison index. In addition, also a sensitivity analysis based on a [Formula: see text] fractional factorial design scheme, to investigate on influence of several operating and cost parameters on charts economic robustness, is carried out and the related considerations are given. The obtained results show that the parameters having the most impact on economic robustness, when the out-of-control process shift is not accurately estimated, are the cost associated with the production of non-conforming parts and the failure rate of the manufacturing system.

ACS Style

Toni Lupo. Economic Robustness Analysis of Adaptive Chart Schemes for Monitoring the Total Nonconformities Number in Inspection Units. International Journal of Reliability, Quality and Safety Engineering 2015, 22, 1550002 .

AMA Style

Toni Lupo. Economic Robustness Analysis of Adaptive Chart Schemes for Monitoring the Total Nonconformities Number in Inspection Units. International Journal of Reliability, Quality and Safety Engineering. 2015; 22 (1):1550002.

Chicago/Turabian Style

Toni Lupo. 2015. "Economic Robustness Analysis of Adaptive Chart Schemes for Monitoring the Total Nonconformities Number in Inspection Units." International Journal of Reliability, Quality and Safety Engineering 22, no. 1: 1550002.

Journal article
Published: 01 January 2015 in Journal of Air Transport Management
Reads 0
Downloads 0

In this paper a new approach was proposed so as to comparatively evaluate the quality of service alternatives. In particular, a fuzzy extension of the ServPerf service conceptual model was considered to estimate quality scores of fundamental service criteria, whereas the non-compensative multicriteria decision-making ELECTRE III method was employed to point out the quality ranking of service alternatives on the basis of which the comparative service quality analysis was performed. In order to show the effectiveness of the proposed approach, an empirical study concerning service quality evaluation of the three international airports in Sicily (Italy) was conducted with detailed proposals for passenger service improvement. The results showed that only few key service aspects played a focal role in quality airport service. Moreover, the effects on the evaluation of service quality, arising from customers' uncertainties, were computed, thus demonstrating the effectiveness of the proposed approach

ACS Style

Toni Lupo. Fuzzy ServPerf model combined with ELECTRE III to comparatively evaluate service quality of international airports in Sicily. Journal of Air Transport Management 2015, 42, 249 -259.

AMA Style

Toni Lupo. Fuzzy ServPerf model combined with ELECTRE III to comparatively evaluate service quality of international airports in Sicily. Journal of Air Transport Management. 2015; 42 ():249-259.

Chicago/Turabian Style

Toni Lupo. 2015. "Fuzzy ServPerf model combined with ELECTRE III to comparatively evaluate service quality of international airports in Sicily." Journal of Air Transport Management 42, no. : 249-259.

Journal article
Published: 04 December 2014 in International Transactions in Operational Research
Reads 0
Downloads 0

The main approaches for the television scheduling design are commonly based on the ratings or revenues maximization objective, and thus, only a single optimal solution can be obtained, corresponding to the best result for the considered objective. Therefore, these approaches lead up to the alternative solutions loss which, even if less effective from the ratings or revenues maximization viewpoint, may be more suitable for the decision maker because of better compromise in relation to factors influencing the decision process. Specifically, such a compromise could be achieved through a suitable “trade‐off” between these factors, with reference to the decision context in which the decision maker has to operate. The present study concerns the development of a multi‐objective approach for the television scheduling design in which ratings and costs are the considered objectives to optimize, because these are the main factors influencing the decision process. In particular, an integer mathematical programming model is formulated and solved, considering as input data forecasted values of show‐parts ratings and costs obtained by a suitable forecast engine. Finally, in order to show the employment of the proposed approach, a case study concerning the television scheduling optimization for an Italian TV channel is conducted with detailed practical considerations.

ACS Style

Toni Lupo. Non-dominated “trade-off” solutions in television scheduling optimization. International Transactions in Operational Research 2014, 22, 563 -584.

AMA Style

Toni Lupo. Non-dominated “trade-off” solutions in television scheduling optimization. International Transactions in Operational Research. 2014; 22 (3):563-584.

Chicago/Turabian Style

Toni Lupo. 2014. "Non-dominated “trade-off” solutions in television scheduling optimization." International Transactions in Operational Research 22, no. 3: 563-584.

Journal article
Published: 01 April 2014 in International Journal of Reliability, Quality and Safety Engineering
Reads 0
Downloads 0

Economic design approaches of control charts are commonly based on the assumption that various cost parameters values and the occurrence risk of assignable causes have to be a priori known with precision. However, in real operative contexts, such parameters can be really difficult to accurately estimate, especially considering costs arising from out-of-control conditions of the process. As consequence, pure economic design approaches can involve chart schemes with low statistical performance. To overcome such limitation, it is herein proposed a multi-objective economic-statistical design approach for an adaptive X-bar chart. In particular, such approach aims at the minimization of both the total quality related costs and the out-of-control average run length, in such a way assuring an optimal trade-off between economic and statistical performance of the related control procedure. Moreover, for a robust design approach, the mean shift is considered as a random variable. A mixed integer nonlinear constrained mathematical model is formulated to solve the treated problem, whereas the Pareto optimal frontier is described by the ε-constraint method. In order to show the employment of the proposed approach, an illustrative example is developed and the related considerations are given. Finally, some sensitivity analysis is also performed to investigate the effects of operative and costs parameters on chart parameters.

ACS Style

Toni Lupo. ECONOMIC-STATISTICAL DESIGN APPROACH FOR A VSSI X-BAR CHART CONSIDERING TAGUCHI LOSS FUNCTION AND RANDOM PROCESS SHIFTS. International Journal of Reliability, Quality and Safety Engineering 2014, 21, 1 .

AMA Style

Toni Lupo. ECONOMIC-STATISTICAL DESIGN APPROACH FOR A VSSI X-BAR CHART CONSIDERING TAGUCHI LOSS FUNCTION AND RANDOM PROCESS SHIFTS. International Journal of Reliability, Quality and Safety Engineering. 2014; 21 (2):1.

Chicago/Turabian Style

Toni Lupo. 2014. "ECONOMIC-STATISTICAL DESIGN APPROACH FOR A VSSI X-BAR CHART CONSIDERING TAGUCHI LOSS FUNCTION AND RANDOM PROCESS SHIFTS." International Journal of Reliability, Quality and Safety Engineering 21, no. 2: 1.

Book chapter
Published: 01 January 2014 in Engineering Education
Reads 0
Downloads 0
ACS Style

Toni Lupo. Evaluation to support stakeholder-centered design and continuous quality improvement in higher education services. Engineering Education 2014, 67 -97.

AMA Style

Toni Lupo. Evaluation to support stakeholder-centered design and continuous quality improvement in higher education services. Engineering Education. 2014; ():67-97.

Chicago/Turabian Style

Toni Lupo. 2014. "Evaluation to support stakeholder-centered design and continuous quality improvement in higher education services." Engineering Education , no. : 67-97.

Journal article
Published: 01 December 2013 in Expert Systems with Applications
Reads 0
Downloads 0

In recent years, the attention that the European Community has focused on the education sector has produced a new university commitment addressed to quality aspects for all education related services. In fact, a quality oriented service requires excellence in the design and planning of service activities, as well as during its delivering and also for the adopted service performance evaluation method. However, considering that service performance evaluations are deeply based on stakeholders’ judgments, they can be characterized by possible uncertainties related to incompleteness for partial ignorance, imprecision for subjectivity and even vagueness. Therefore, under these conditions, unreliable results can be obtained by widely considered service analysis methods. In the present paper, a method based on a recent extension of the ServQual model and that uses in combined manner the Fuzzy Set Theory and the Analytic Hierarchy Process method is proposed to effectively handle uncertainty in service performance analyses. In particular, the Fuzzy Set Theory is considered to deal with such uncertainty, whereas the AHP method is adopted as tool to estimate the importance weights of the strategic service attributes. Subsequently, the strategic analysis of the service value tree related to the Management Engineering program at the University of Palermo (Italy) is performed by using the proposed method. The performed service analysis allows the most influencing service performance factors to be captured and commented upon. Finally, the obtained results show that the professors’ perception of service quality meaningfully influences the overall service performance leve

ACS Style

Toni Lupo. A fuzzy ServQual based method for reliable measurements of education quality in Italian higher education area. Expert Systems with Applications 2013, 40, 7096 -7110.

AMA Style

Toni Lupo. A fuzzy ServQual based method for reliable measurements of education quality in Italian higher education area. Expert Systems with Applications. 2013; 40 (17):7096-7110.

Chicago/Turabian Style

Toni Lupo. 2013. "A fuzzy ServQual based method for reliable measurements of education quality in Italian higher education area." Expert Systems with Applications 40, no. 17: 7096-7110.

Journal article
Published: 07 November 2013 in Quality and Reliability Engineering International
Reads 0
Downloads 0

The process capability analysis is a crucial activity to evaluate if the process outcome meets the design specifications. Classically, such analysis is performed by verifying the in-control condition of the process and evaluating suitable capability indices, by assuming the process in-control steady-state condition. However, the in-control period of the process characterizes only a part of the system functioning cycle, the one with the lower defective rate. In particular, the system functioning cycle is also characterized by the out-of-control period, during which a greater defective rate is produced, and such increasing is not considered by the widely adopted capability indices. As consequence, the classical approaches to perform the process capability analysis involves an overestimation of the process capability level. For this reason, in order to overcome the previously described limitation, in the present paper it is proposed a new capability index based on the real defective rate of the process. Thus, such new index is able to estimate the real process capability level. Finally, in order to compare the new index to the conventional Cp capability index, a numerical comparison study related to a process capability analysis is carried out, and the related practical considerations are given

ACS Style

Toni Lupo. The New Nino Capability Index for Dynamic Process Capability Analysis. Quality and Reliability Engineering International 2013, 31, 305 -312.

AMA Style

Toni Lupo. The New Nino Capability Index for Dynamic Process Capability Analysis. Quality and Reliability Engineering International. 2013; 31 (2):305-312.

Chicago/Turabian Style

Toni Lupo. 2013. "The New Nino Capability Index for Dynamic Process Capability Analysis." Quality and Reliability Engineering International 31, no. 2: 305-312.

Journal article
Published: 24 October 2013 in Quality and Reliability Engineering International
Reads 0
Downloads 0

In the present paper is developed a statistical process control inspection procedure based on a new simple-to-implement and effective double sampling scheme for the c control chart, aimed at the minimization of the number of inspected observation units and warranting fixed levels for the type I and II error risks. In particular, the formulations of the false alarm risk α, the power P of the chart, and the expected number of inspected observation units for the developed inspection procedure are given, whereas a macro of Microsoft Excel is adopted to solve the tackled problem. In order to illustrate the application of the developed approach and to investigate on the influence of several operating parameters, numerical examples are carried out and the related considerations are given. Finally, by comparing the performance of the developed inspection procedure with that of the related classic c chart scheme, meaningful reduction of the number of the inspected observation units can be achieved by adopting the proposed approach

ACS Style

Roberta Inghilleri; Toni Lupo; Gianfranco Passannanti. An Effective Double Sampling Scheme for thecControl Chart. Quality and Reliability Engineering International 2013, 31, 205 -216.

AMA Style

Roberta Inghilleri, Toni Lupo, Gianfranco Passannanti. An Effective Double Sampling Scheme for thecControl Chart. Quality and Reliability Engineering International. 2013; 31 (2):205-216.

Chicago/Turabian Style

Roberta Inghilleri; Toni Lupo; Gianfranco Passannanti. 2013. "An Effective Double Sampling Scheme for thecControl Chart." Quality and Reliability Engineering International 31, no. 2: 205-216.

Journal article
Published: 30 September 2013 in Transport Policy
Reads 0
Downloads 0

The quality level of services has to be constantly controlled, especially under conditions of competition increasing and limited resources. However, considering that service performance analyses are based on stakeholders' judgments, they can be characterized by possible uncertainties related to incompleteness for partial ignorance, imprecision for subjectivity and even vagueness. Therefore, under these conditions, unreliable results can be obtained by widely used service analysis methodologies. In the present paper, a methodology based on a recent extension of the SERVQUAL model, and that uses in combined manner the fuzzy set theory and the analytic hierarchy process method is proposed to effectively handle uncertainty in service performance analyses. In particular, the fuzzy set theory is considered to deal with such uncertainty, whereas the AHP method is adopted as tool to estimate the importance weights of the strategic service attributes. Subsequently, the Italian public transport service sector is strategically analysed, and its overall service quality structure is described and, finally, the strategic analysis of the public urban transport service delivered in Palermo (Italy) is performed by means of the proposed methodology. The performed service analysis allows the most influencing service factors to be captured and commented upon. The obtained results show that the management's perception of service quality meaningfully influences the overall service performance level.

ACS Style

Toni Lupo. Handling stakeholder uncertain judgments in strategic transport service analyses. Transport Policy 2013, 29, 54 -63.

AMA Style

Toni Lupo. Handling stakeholder uncertain judgments in strategic transport service analyses. Transport Policy. 2013; 29 ():54-63.

Chicago/Turabian Style

Toni Lupo. 2013. "Handling stakeholder uncertain judgments in strategic transport service analyses." Transport Policy 29, no. : 54-63.

Journal article
Published: 27 June 2013 in Quality and Reliability Engineering International
Reads 0
Downloads 0

The present paper proposes a multi-objective design approach for the c chart, considering in the optimization process of the chart parameters both the statistical and the economic objectives. In particular, the minimization of the hourly total quality related costs is the considered objective to carry out the economic goal, whereas the statistical objective is reached by the minimization the out-of-control average run length of the chart. A mixed integer non-linear constrained mathematical model is formulated to solve the treated multi-objective optimization problem, whereas the Pareto optimal frontier is described by the «-constraint method. In order to show the employment of the proposed approach, an illustrative example is developed and the related considerations are given. Finally, some sensitivity analysis is also performed to investigate the effects of operative and costs parameters on the chart performanc

ACS Style

Toni Lupo. A Multi-Objective Design Approach for the c Chart Considering Taguchi Loss Function. Quality and Reliability Engineering International 2013, 30, 1179 -1190.

AMA Style

Toni Lupo. A Multi-Objective Design Approach for the c Chart Considering Taguchi Loss Function. Quality and Reliability Engineering International. 2013; 30 (8):1179-1190.

Chicago/Turabian Style

Toni Lupo. 2013. "A Multi-Objective Design Approach for the c Chart Considering Taguchi Loss Function." Quality and Reliability Engineering International 30, no. 8: 1179-1190.

Journal article
Published: 14 June 2013 in Quality and Reliability Engineering International
Reads 0
Downloads 0

In an attempt to improve the effectiveness of statistical process control (SPC) procedures, a variety of adaptive schemes has\ud been developed in the last decades. However, considering control charts for attributes, relatively few works about adaptive\ud schemes have been proposed, and most of them were proposed only recently. The common characteristic of those schemes is\ud that one or more chart parameters are allowed to adaptively vary during the SPC operations according to the sampling\ud information history, typically the current point plotted on the chart. In this way, the adaptive schemes are smarter than\ud the related static ones, but they are also more complicated in terms of implementation. The purpose of the present work\ud is to evaluate and compare the economic performance of the main adaptive schemes of a control chart for attributes, in order\ud to derive conclusions on their relative effectiveness. In particular, the analysis is focused on the c chart that is used to monitor\ud the total nonconformities number in an inspection unit. A numerical comparative study, based on a 25 1\ud V fractional factorial\ud design scheme, to investigate on the influence of several operating and costs parameters, is carried out, and the related\ud considerations are given. The obtained results show that the chart parameter having the most impact on the economic\ud performance is the sampling interval. Therefore, in most cases, the use of a c chart with adaptive sampling intervals is the\ud better choice than other adaptive schemes, which are also more complicated in terms of implementatio

ACS Style

Toni Lupo. Comparing the Economic Effectiveness of Various Adaptive Schemes for the c Chart. Quality and Reliability Engineering International 2013, 30, 723 -743.

AMA Style

Toni Lupo. Comparing the Economic Effectiveness of Various Adaptive Schemes for the c Chart. Quality and Reliability Engineering International. 2013; 30 (5):723-743.

Chicago/Turabian Style

Toni Lupo. 2013. "Comparing the Economic Effectiveness of Various Adaptive Schemes for the c Chart." Quality and Reliability Engineering International 30, no. 5: 723-743.