scholarly journals A New Application-Aware No-Reference Quality Assessment Method for IP Voice Services

2021 ◽  
Vol 29 (3) ◽  
Author(s):  
Péter Orosz ◽  
Tamás Tóthfalusi
Keyword(s):  
Service Quality ◽  
Performance Metrics ◽  
Assessment Method ◽  
Reference Source ◽  
User Privacy ◽  
Quality Model ◽  
Estimation Model ◽  
Full Reference ◽  
Reference Quality ◽  
The Voice

AbstractThe increasing number of Voice over LTE deployments and IP-based voice services raise the demand for their user-centric service quality monitoring. This domain’s leading challenge is measuring user experience quality reliably without performing subjective assessments or applying the standard full-reference objective models. While the former is time- and resource-consuming and primarily executed ad-hoc, the latter depends upon a reference source and processes the voice payload that may offend user privacy. This paper presents a packet-level measurement method (introducing a novel metric set) to objectively assess network and service quality online. It is accomplished without inspecting the voice payload and needing the reference voice sample. The proposal has three contributions: (i) our method focuses on the timeliness of the media traffic. It introduces new performance metrics that describe and measure the service’s time-domain behavior from the voice application viewpoint. (ii) Based on the proposed metrics, we also present a no-reference Quality of Experience (QoE) estimation model. (iii) Additionally, we propose a new method to identify the pace of the speech (slow or dynamic) as long as voice activity detection (VAD) is present between the endpoints. This identification supports the introduced quality model to estimate the perceived quality with higher accuracy. The performance of the proposed model is validated against a full-reference voice quality estimation model called AQuA, using real VoIP traffic (originated in assorted voice samples) in controlled transmission scenarios.

Managerial Implications of Student Activity Information System Implementation at Faculty of Business and Management

2020 ◽  
Vol 5 (1) ◽  
pp. 41
Author(s):  
Norshima Humadi ◽  
Muhamad Sukor Jaafar ◽  
Melissa Shahrom ◽  
Siti Halijjah Shariff
Keyword(s):  
Information System ◽  
Service Quality ◽  
Student Satisfaction ◽  
Direct Effect ◽  
Quality Model ◽  
Application Process ◽  
Student Activity ◽  
Managerial Implications ◽  
Business And Management ◽  
Activity Information

Faculty of Business and Management – Student Activity Information System (FBM-SAIS) was developed with an aim to manage the student activity application process effectively through the Internet. This study was conducted to determine the managerial implications of FBM-SAIS implementation to FBM, UiTM Selangor by focusing on the manpower and financial impact, as well as to determine the direct effect of SAIS Service Quality on SAIS student satisfaction. This study proposed SAIS ServiceQuality as a higher-order factor in order to determine a direct effect of SAIS Service Quality on student satisfaction towards SAIS implementation. Interviews were conducted to identify the managerial implications of student activity application process before and after SAIS implementation. Meanwhile, the quantitative data was gathered from 94 SAIS users who were FBM students through e-survey and was analyzed by using SmartPLS 3.0. The interview results showed that the implementation of SAIS did have an impact on the Faculty, such as increasing staff productivity and reducing costs. Moreover, the PLS-SEM analysis results showed that SAIS Service Quality positively influenced student satisfaction towards FBMSAIS implementation. This study provides an empirical validation of the SAIS Service Quality Model in the context of Higher Education.

scholarly journals Construction of a quality model for machine learning systems

2021 ◽  
Author(s):  
Julien Siebert ◽  
Lisa Joeckel ◽  
Jens Heidrich ◽  
Adam Trendowicz ◽  
Koji Nakamichi ◽  
...  
Keyword(s):  
Machine Learning ◽  
Lessons Learned ◽  
Training Data ◽  
Use Case ◽  
Construction Process ◽  
Quality Model ◽  
Quality Models ◽  
Quality Properties ◽  
Reference Quality ◽  
Industrial Use

AbstractNowadays, systems containing components based on machine learning (ML) methods are becoming more widespread. In order to ensure the intended behavior of a software system, there are standards that define necessary qualities of the system and its components (such as ISO/IEC 25010). Due to the different nature of ML, we have to re-interpret existing qualities for ML systems or add new ones (such as trustworthiness). We have to be very precise about which quality property is relevant for which entity of interest (such as completeness of training data or correctness of trained model), and how to objectively evaluate adherence to quality requirements. In this article, we present how to systematically construct quality models for ML systems based on an industrial use case. This quality model enables practitioners to specify and assess qualities for ML systems objectively. In addition to the overall construction process described, the main outcomes include a meta-model for specifying quality models for ML systems, reference elements regarding relevant views, entities, quality properties, and measures for ML systems based on existing research, an example instantiation of a quality model for a concrete industrial use case, and lessons learned from applying the construction process. We found that it is crucial to follow a systematic process in order to come up with measurable quality properties that can be evaluated in practice. In the future, we want to learn how the term quality differs between different types of ML systems and come up with reference quality models for evaluating qualities of ML systems.

Measuring the Quality of Internet Connectivity Service Rendered to South African Public Libraries

Mousaion ◽  
2021 ◽  
Vol 38 (4) ◽  
Author(s):  
Lesiba Stephen Ledwaba
Keyword(s):  
Service Quality ◽  
South African ◽  
Service Providers ◽  
Public Libraries ◽  
Internet Access ◽  
Quality Model ◽  
Technical Problems ◽  
Internet Connectivity ◽  
Access Service

The measuring of rendered services in any industry, especially in libraries, remains a critical tool to assess the satisfaction level of clients as well as the quality of the services. This article reports on a study that was undertaken to measure the quality of internet access service to South African public libraries by using the service quality model. The paper was guided by these objectives to identify the service quality models applicable to public libraries’ internet access; to determine how the quality of internet access service fits within the South African broadband policy; and to apply service quality dimensions to public libraries’ internet access. The study employed a quantitative approach and survey design in which a questionnaire was used to collect data from 322 heads of public libraries in South Africa. The stratified sampling method was used to obtain a proportional representation of public libraries. It emerged that most respondents regarded their internet service providers (ISPs) as incapable of solving their technical problems. It was further found that in most cases ISPs applied the internet access policies inconsistently to public libraries they served. The study recommended, among others, that internet connectivity to public libraries be centralised and that a competent provider be appointed to manage this service.

scholarly journals Customer-based Port Service Quality Model

2012 ◽  
Vol 23 (6) ◽  
pp. 495-502 ◽  
Author(s):  
Ines Kolanović ◽  
Čedomir Dundović ◽  
Alen Jugović
Keyword(s):  
Service Quality ◽  
Statistical Data ◽  
Reliability Testing ◽  
Quality Indices ◽  
Quality Model ◽  
Traffic System ◽  
Five Factors ◽  
Proposed Model ◽  
Quality Study ◽  
Customer Model

This port service quality study is an important precondition for an efficient development of port industry and traffic system as a whole. It is due to the complexity of any port, as a system consisting of a large number of stakeholders rendering services to customers with various requirements, that a unique set of port service quality indices has been still missing. For this reason, the paper explains the port service quality concept in compliance with stakeholders and their requirements within the context of port service quality. The aim of the paper is to present a proposal for a customer-based port service quality model based on empirical study and its reliability testing on a selected sample. The proposed model is defined by five factors and fits satisfactorily into the obtained poll questionnaire results. The statistical data processing package SPSS 16.0 and the LISREL 8.54 programme were used in the study. KEY WORDS: port service, customer, model, factor analysis

scholarly journals Statistical analysis of factors affecting the service quality of Jetstar Pacific Airlines

2015 ◽  
Vol 18 (2) ◽  
pp. 67-75
Author(s):  
Nhan Huu Huynh ◽  
Dung Anh To
Keyword(s):  
Factor Analysis ◽  
Statistical Analysis ◽  
Service Quality ◽  
External Environment ◽  
Technical Quality ◽  
Quality Model ◽  
Factors Affecting ◽  
Functional Quality ◽  
The Relationship

The aim of this paper is to study the effects of service quality in Jetstar Pacific Airlines towards customer’s satisfaction under the perspective of Servqual and Gronroos service quality model and the relationship between functional quality, technical quality, internal and external environment influences mediated by Jetstar Pacific Airlines images and service quality using the main statistical methods such as factor analysis and multiple linear regression.

scholarly journals Influence of Perceived Service Quality on Customer Loyalty

2020 ◽  
Vol 2 (2) ◽  
pp. 105-121
Author(s):  
Madumere Humphrey Ikenna ◽  
Dickson Ben Uche ◽  
Agu Godswill Agu
Keyword(s):  
Service Quality ◽  
Customer Loyalty ◽  
Road Transport ◽  
Quality Model ◽  
Perceived Service Quality ◽  
The Road ◽  
Customer Base ◽  
Transport Industry ◽  
Survey Results ◽  
The Relationship

The purpose of this was to investigate the relationship between perceived service quality and customer loyalty in the road transport industry in Nigeria. Leveraging the RATER service quality model, only reliability, tangibles and responsiveness were explored. Participants were drawn from the customer base of organized road transport firms operating in the South East of Nigeria. Being a quantitative survey, results from 318 valid responses were analyzed with SPSS version 21.  Findings indicate that the three constructs (reliability, tangibles, and responsiveness) are significant predictors of customer loyalty, with reliability having the greatest influence, followed by responsiveness and tangibles. The study recommends steady monitoring of service quality as a step towards customer loyalty in the highly competitive road transport industry in Nigeria.

scholarly journals Financial Control Systems and Financial Systems Theory: Free Cash Flow and Profitability Nexus: a Comparative Study of Manufacturing Firms in Nigeria and Ghana

2020 ◽  
Vol 15 ◽  
Keyword(s):  
Cash Flow ◽  
Net Present Value ◽  
Performance Metrics ◽  
Positive Impact ◽  
Research Work ◽  
Manufacturing Firms ◽  
Free Cash Flow ◽  
Estimation Model ◽  
Financial Systems ◽  
The Impact

In Financial Systems, the impact of Free Cash Flow (FCF) on the performance of a company has been in the center of academic discourse in recent years. Several studies have tried to ascertain the nature and magnitude of the relationship between free cash flow and firm profitability with conflicting results coming from different scholars. The main objective of this research work was to examine the impact of FCF on the profitability of quoted manufacturing firms in the Nigerian and Ghana stock exchanges. Data were pooled from twenty (20) different companies (ten each from Nigeria and Ghana) for a period of six years (2012 – 2017). A panel data estimation model was used to measure the impact of FCF and other performance metrics on the Return on Assets (ROA), which is our chosen profitability measure. The results show a positive but insignificant relationship between FCF and ROA both for Ghana and Nigerian manufacturing firms. Also, sales growth showed a positive impact on profitability of both countries while leverage negatively impacted on profitability. with Ghana being significant at 5%. The implication of the findings of the study is that it makes no business sense for companies to keep piling up excess funds beyond that which is needed for transactional purposes. The similarity between the results from Ghana and Nigeria in most of the variables shows that the findings of this study can be generalized to other countries. Based on the findings of the study, we recommend that the management of companies should strive to keep only the minimum needed free cash flow while the rest should be invested in other projects with positive net present value

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