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The purpose of this paper is to introduce a framework that presents how internal audit effectiveness can be operationalized and what factors are available to influence the effectiveness. Internal audits have become one of the key practices for organizations to control the adherence of their processes to standard procedures and regulations. The benefits of conducting internal audits are well acknowledged in the literature. However, it is difficult for organizations to assess the effectiveness of internal audits and to understand the factors that influence audit effectiveness.

A systematic literature review was conducted to identify relevant publications and collect and synthesize evidence on the operationalization of internal audit effectiveness and the factors that potentially influence the effectiveness of internal audits.

A thorough analysis of the relevant studies resulted in a comprehensive list of indicators used for the operationalization of audit effectiveness and a list of potentially influencing factors. The results of the systematic review are synthesized into a framework.

The researchers should consider this study as a comprehensive source that offers pointers on the factors investigated in the literature and a basis for future research in this field to address the gaps that are identified.

Awareness about how the effectiveness of internal audits can be measured, and the factors that can potentially influence this effectiveness can help organizations to understand their current performance and ultimately improve it in the future.

The contributions of this study will help in better understanding the state of the research on internal audit effectiveness, including the influential factors, and gaps and opportunities for future research.

The purpose of this study is to understand how internal auditors perceive the internal audit quality and to highlight the different profiles of internal auditors based on their perception of internal audit quality determinants.

The authors’ methodological approach is based on the submission of a self-administered questionnaire. The final sample consists of 104 internal auditors. The first stage of the study is in the lead of a certified public accountants (CPA), which highlights seven factors of the internal audit quality. The second step is a confirmatory factor analysis (CFA) that allowed the authors to validate the model proposed by the CPA. Finally, the authors carry out a typological analysis of the auditors according to their way of perceiving the factors extracted by the CPA.

The authors’ model, validated by the CFA, shows that the knowledge of the internal auditor, the independence of reporting, compliance with professional standards of internal audit, the relationship with the external auditor, the personal relationship of the internal auditor, the access to information and the field of intervention of the internal auditor have a positive association with the internal audit quality but with a different degree of significance. For example, the field of intervention of the internal auditor and the access to information explain better the internal audit quality. However, the knowledge of the internal auditor and the relationship with the external auditor are not significant to explain the internal audit quality. From the hierarchical cluster analysis, four groups of internal auditors emerged: the autonomous, the perfectionists, the rigorous ones and the objectives.

In offering these findings, the paper contributes to the existing internal audit literature by introducing evidence from an emerging country, namely, Tunisia, of the internal audit quality model. In addition, the authors proposed a new measure to the internal audit quality model which is the use of the work of the internal auditor by the external auditor. This study is also interesting to managers and professional internal audit organizations in recognizing the characteristics of the quality of the internal audit and advance reflections on the effectiveness of internal audit practices. The authors’ study proposes a typology of certified internal auditors through their perceptions of the quality of the internal audit while taking into account the specificities of the Tunisian audit market. This provides insights to managers and audit committees on the measures necessary to ensure the relevance of the internal audit work within their companies.

This paper aims to analyze the factors that influence the quality of internal audits in Brazilian federal educational institutions.

The study consisted of a survey whose target participants were members of the internal audits and members of the senior management of Brazilian Federal Educational Institutions. The analyses included descriptive statistics of the sample, exploratory factor analysis and multiple regression analysis.

The results showed that the internal audit functions, continuous improvement practices and relationship between internal and external auditors as factors had a positive impact on the internal audit quality dependent variable. The internal audit functions and continuous improvement practices as factors influenced both models that were created (audit members and senior management), whereas the relationship between internal and external auditors was only relevant to senior management. Organizational support and internal audit autonomy, on the other hand, were not statistically significant.

Considering the recent Brazilian research on internal auditing in Educational Institutions, this study differs from others in that it covered all the Universities (63), Federal Institutes (38), Federal Centers of Technological Education (2) and Colégio Pedro II. Another relevant issue refers to the target audience, addressing both the members of the internal audits (supply side) and the Senior Management (one of the main parties impacted by the work of the internal audits).

The purpose of this paper is to investigate the perceptions of a sample of Jordanian external auditors for the importance given by them to a number of factors which may influence their reliance on an internal auditor during their external audit. The paper also examines the relationship, if any, between the degree of reliance on the internal and external audit fees.

A sample of 100 external auditors is employed to investigate the perceptions of external auditors as to the importance given by them to a number of factors which may influence their reliance on an internal auditor during their external audit. Also, a cross‐sectional multiple regression analysis is conducted to examine the impact of this reliance on audit fees.

The results of the paper indicate that external auditors in Jordan consider the objectivity, competence and work performance of internal auditors as very important factors affecting their reliance decisions. It is found that “objectivity” had the highest mean score (4.353), followed by “competence” (4.188) and “work performance” (4.156). The results of the multiple regression analysis indicated that the size of the audited company is the most important variable in explaining the variation in audit fees paid by the sample companies. As for the reliance variable, it is found insignificant.

It is believed that no previous research has examined these issues on the basis of Jordanian data. Thus, the current paper aims to extend the literature on these topics on a developing country with different characteristics. The results of this paper will be of concern to companies in their attempt to reduce external audit fees. Audit firms may also benefit from the paper in terms of reducing the efforts of external auditors due to the understanding and cooperation between external and internal auditors.

The main purpose of this research is to figure out the most effective determinants that play a vital role in enhancing the effectiveness of the internal Sharīʿah audit in the Islamic banking industry.

This paper reviews the existing literature to build comprehensive knowledge that would assist in determining the main factors that impact on the effectiveness of Sharīʿah audit in Islamic banks.

This research proposes a conceptual framework of factors that impact on Sharīʿah audit effectiveness in IBs based on previously published studies. The proposed framework includes external and internal factors as well as internal Sharīʿah audit structure, process and requirements.

First, the regulators need to provide a detailed framework for Sharīʿah audit which covers the main requirements for effective Sharīʿah governance. Second, Islamic financial institutions (IFIs) need to pay more attention to following the Sharīʿah audit process in order to achieve the objective of effective Sharīʿah governance. Finally, the dearth of empirical research on the role and effectiveness of Sharīʿah audit in Islamic banking highlights the need to develop an appropriate methodology to enhance the study of the effectiveness of Sharīʿah governance practices.

The Sharīʿah ensures compliance with its rules and regulations and enhances the soundness and credibility of the Islamic finance industry. This study identifies a number of issues that require further investigation in order to establish a better system of Sharīʿah audit and to identify the factors that affect Sharīʿah auditing practices. This paper is unique in covering the main elements that have influence on the effectiveness of Sharīʿah audit and proposes them in one framework.

This study aims to investigate the factors associated with the implementation of risk-based internal audit (RBIA).

As a first step, a literature review of the relevant literature is performed and five potential factors related to the implementation of RBIA are identified. Based on that, this paper constructs a questionnaire survey sent out to 185 internal auditors, executives and accountants in Greece to receive 90 responses during the period of November 2019–January 2020. Multiple regression analysis is conducted to identify the factors related to the implementation of RBIA.

This paper shows that there is a statistically significant positive relationship between the implementation of RBIA and: the provision of risk management training, an active audit committee role and the establishment of a formalized risk management system.

The results have important implications for internal auditors, chief executive officers and accountants who wish to enhance internal audit effectiveness and the accuracy and quality of financial information.

Empirical studies on the factors related to the implementation of RBIA are rare. This is the first study to create empirical variables based on a thorough review of the relevant literature to empirically investigate the factors that are related to the implementation of RBIA in an emerging economy. By focusing on the Greek context, this study also sheds light to other countries with similar corporate governance systems, thus providing insights to settings where the Type II agency problem exists (La Porta et al., 1999).

The purpose of this paper is to explore whether internal audit's reporting relationship with the audit committee and the client's business risk environment impact external auditors' reliance on the work of internal audit.

An experiment is conducted using a 2×2 between‐subjects design where we manipulate the above two factors at strong and weak levels. Participants are 66 audit partners, managers and seniors, all experienced with clients having internal audit functions.

The results indicate that both factors affect external auditors' reliance on work already undertaken by internal audit and their use of internal auditors (IA) as assistants. The results also indicate that external auditors are more likely to use internal audit for control evaluation tasks than for substantive tests of balances. The study does not find any significant interaction effects between the two factors.

No prior studies have examined the influence of reporting relationship and client business risk on external auditors' reliance decisions in the current governance environment. Further, the paper examines the impact of these factors on reliance on work already undertaken by internal audit and on using IA as assistants, with respect to both control evaluation work and substantive testing of balances.

In recent decades, managerial desire to use internal audit services to promote well-controlled organizational processes has significantly increased in the public sector. Yet, there is rare information on how internal audits may effectively be implemented in the public sector. The present research aims to design a comprehensive internal audit effectiveness model for the public sector.

This research is an applied mixed-methods (qualitative–quantitative) and descriptive survey study. The research population in both qualitative and quantitative sections included all internal and external audit managers and staff of Iraqi public organizations. The study sample of the qualitative section included 28 audit managers and staff selected using purposive sampling, and the study sample of the quantitative section included 399 individuals selected using convenience sampling. The data collection instruments in the qualitative and quantitative sections included semi-structured interviews and questionnaires, respectively. Data analysis was carried out using thematic analysis in Atlas.ti software in the qualitative section. Quantitative analysis and model validation were also performed using path analysis and structural equation modeling in Smart-PLS software in the quantitative section.

The results of the qualitative section led to the identification of 38 effectiveness factors among seven main categories, which were finally presented in the form of a comprehensive model. The main categories included the communication between internal and external auditors, granting independence and authority to internal auditors, providing specialized human resources, providing technological resources, developing management support, strengthening organizational culture and developing audit plans. In the qualitative section, the model was validated and confirmed. Quantitative results further showed that the compilation of audit plans and the development of management support were the most important factors.

The present study contributes to the literature by providing a comprehensive framework on internal audit with an emphasis on resource-based theory and reducing the research gap in the field of agents influencing internal audit efficacy in the public sector of developing countries. Further, the study provides insights into an under-studied developing country, Iraq.

This study aims to explore and assess the key Sharīʿah governance factors that may have an influence on the internal Sharīʿah audit structure and its practices in Islamic financial Institutions in Yemen, particularly in the Islamic banking sector.

To do so, the study adopts a qualitative approach employing case study analysis, and both primary and secondary data are used to formulate the appropriate interview questions and achieve the objectives of the study.

The authors observed that the key factors that help in assessing the internal Sharīʿah audit structure and its practices are Sharīʿah auditor charter, audit plan and audit manual. In addition, the authors observed that, in general, internal Sharīʿah audit tends to be subjective in Yemeni banks because they depend on the internal Sharīʿah auditor’s qualifications and experience more than formal guidelines and regulations. This is because there are no detailed internal Sharīʿah audit plans or detailed audit manual. Moreover, the internal Sharīʿah auditor charter is not comprehensive in explaining the duties required of the internal Sharīʿah auditor, and it is mixed with the Sharīʿah Supervisory Board (SSB) duties. This means the internal Sharīʿah auditor lacks the critical tools that enable him to achieve the desired audit manual objectives where the effectiveness of internal Sharīʿah audit can be measured.

One of the important implications of this study is providing very important guidance about enhancing the areas where shortfalls are found within the Sharīʿah governance process in the Yemeni banking system. This enhancement process of the internal factors of Sharīʿah governance can be achieved by increasing the awareness of the enhancing internal Sharīʿah audit structure as it reflects ultimately on the internal Sharīʿah auditor’s role and his practices.

Understanding the effectiveness of internal Sharīʿah audit structure among internal auditors will improve the Sharīʿah audit framework standards, enhance the Sharīʿah knowledge among internal auditors and provide general guidelines to design audit programmes for Sharīʿah governance auditing process.

The purpose of this study is to investigate the factors affecting the silence of internal auditors. To this end, the impacts of the perceived climate of silence, professional commitment, independence commitment, role conflict and role ambiguity on internal auditor silence have been investigated. Furthermore, the effects of role conflict and role ambiguity through independence commitment on internal auditor silence were investigated.

The statistical population of the study consisted of Iranian internal auditors in 2021. The study used a self-administered survey of 217 internal auditors. In this research, a hierarchical component model in the partial least squares structural equation modeling analysis was used to examine the hypotheses.

The results of testing the hypotheses indicated that the perceived climate of silence and role ambiguity have positive effects, and professional commitment and independence commitment have negative effects on internal auditor silence. Furthermore, role conflict has an insignificant effect on internal auditor silence. In addition, role conflict and role ambiguity affect the internal auditor silence through the independence commitment.

This study examined the factors affecting the internal auditor silence by combining the construct of the perceived climate of silence that has been previously discussed in the field of management with the professional (professional commitment and independence commitment) and role (role conflict and role ambiguity) factors that are discussed in the internal audit profession. To the best of the author’s knowledge, this is the first study that examines the factors affecting internal auditor silence behavior. The importance of conducting this study is that it investigates a phenomenon among internal auditors that conflicts with the mission and origin of internal audit.