“…Moreover, this paper tries to explain stakeholders' perceptions on internal audit effectiveness using measures such as competency of internal auditors, the size of internal audit department, relationships between internal auditors and external auditors, and the level of management support for internal audit performance. These factors are identified based on a review of previous studies (see Alzeban & Sawan, 2013;Soh & Bennie, 2011;Ahmad et al, 2009;Mihret & Yiamaw, 2007;Ali et al, 2007;Sarens & Beelde, 2006;Carcello et al, 2005;Brierley et al, 2001Brierley et al, , 2003, along with studying the performance of internal audit departments, guidelines on the international standards for the Professional Practice of Internal Auditing (ISPPIA) published by the international institution for internal audit (IIA), and other available documents and evidence. Drogalas et al (2015) study investigates the specific factors associated with internal audit effectiveness in the Greek business environment.…”