Audit

The word "audit" derives from the Latin word audire which means "to hear".[6]

During medieval times, when manual bookkeeping was prevalent, auditors in Britain used to hear the accounts read out for them and checked that the organization's personnel were not negligent or fraudulent.[7] In 1951, Moyer identified that the most important duty of the auditor was to detect fraud.[8] Chatfield documented that early United States auditing was viewed mainly as verification of bookkeeping detail.[9]

The Central Auditing Commission of the Communist Party of the Soviet Union (Russian: Центральная ревизионная комиссия КПСС) operated from 1921 to 1990.

An information technology audit, or information systems audit, is an examination of the management controls within an Information technology (IT) infrastructure. The evaluation of obtained evidence determines if the information systems are safeguarding assets, maintaining data integrity, and operating effectively to achieve the organization's goals or objectives. These reviews may be performed in conjunction with a financial statement audit, internal audit, or other form of attestation engagement.

Due to strong incentives (including taxation, misselling and other forms of fraud) to misstate financial information, auditing has become a legal requirement for many entities who have the power to exploit financial information for personal gain. Traditionally, audits were mainly associated with gaining information about financial systems and the financial records of a company or a business. Financial audits also assess whether a business or corporation adheres to legal duties as well as other applicable statutory customs and regulations.[10][11]

Financial audits are performed to ascertain the validity and reliability of information, as well as to provide an assessment of a system's internal control. As a result, a third party can express an opinion of the person / organization / system (etc.) in question. The opinion given on financial statements will depend on the audit evidence obtained.

A statutory audit is a legally required review of the accuracy of a company's or government's financial statements and records. The purpose of a statutory audit is to determine whether an organization provides a fair and accurate representation of its financial position by examining information such as bank balances, bookkeeping records, and financial transactions.

Due to constraints, an audit seeks to provide only reasonable assurance that the statements are free from material error. Hence, statistical sampling is often adopted in audits. In the case of financial audits, a set of financial statements are said to be true and fair when they are free of material misstatements – a concept influenced by both quantitative (numerical) and qualitative factors. But recently, the argument that auditing should go beyond just true and fair is gaining momentum.[12] And the US Public Company Accounting Oversight Board has come out with a concept release on the same.[13]

Cost accounting is a process for verifying the cost of manufacturing or producing of any article, on the basis of accounts measuring the use of material, labor or other items of cost. In simple words, the term, cost audit means a systematic and accurate verification of the cost accounts and records, and checking for adherence to the cost accounting objectives. According to the Institute of Cost and Management Accountants, cost audit is "an examination of cost accounting records and verification of facts to ascertain that the cost of the product has been arrived at, in accordance with principles of cost accounting."

In most nations, an audit must adhere to generally accepted standards established by governing bodies. These standards assure third parties or external users that they can rely upon the auditor's opinion on the fairness of financial statements or other subjects on which the auditor expresses an opinion. The audit must therefore be precise and accurate, containing no additional misstatements or errors.

Performance audit refers to an independent examination of a program, function, operation or the management systems and procedures of a governmental or non-profit entity to assess whether the entity is achieving economy, efficiency and effectiveness in the employment of available resources. Safety, security, information systems performance, and environmental concerns are increasingly the subject of audits.[19] There are now audit professionals who specialize in security audits and information systems audits. With nonprofit organizations and government agencies, there has been an increasing need for performance audits, examining their success in satisfying mission objectives.

Quality audits are performed to verify conformance to standards through review of objective evidence. A system of quality audits may verify the effectiveness of a quality management system. This is part of certifications such as ISO 9001. Quality audits are essential to verify the existence of objective evidence showing conformance to required processes, to assess how successfully processes have been implemented, and to judge the effectiveness of achieving any defined target levels. Quality audits are also necessary to provide evidence concerning reduction and elimination of problem areas, and they are a hands-on management tool for achieving continual improvement in an organization.

To benefit the organization, quality auditing should not only report non-conformance and corrective actions but also highlight areas of good practice and provide evidence of conformance. In this way, other departments may share information and amend their working practices as a result, also enhancing continual improvement.

A project audit provides an opportunity to uncover issues, concerns and challenges encountered during the project lifecycle.[20] Conducted midway through the project, an audit affords the project manager, project sponsor and project team an interim view of what has gone well, as well as what needs to be improved to successfully complete the project. If done at the close of a project, the audit can be used to develop success criteria for future projects by providing a forensic review. This review identifies which elements of the project were successfully managed and which ones presented challenges. As a result, the review will help the organization identify what it needs to do to avoid repeating the same mistakes on future projects

Projects can undergo 2 types of Project audits:[19]

• Regular Health Check Audits: The aim of a regular health check audit is to understand the current state of a project in order to increase project success.
• Regulatory Audits: The aim of a regulatory audit is to verify that a project is compliant with regulations and standards. Best practices of NEMEA Compliance Centre describe that, the regulatory audit must be accurate, objective, and independent while providing oversight and assurance to the organization.

Other forms of Project audits:

Formal: Applies when the project is in trouble, sponsor agrees that the audit is needed, sensitivities are high, and need to be able prove conclusions via sustainable evidence.

Informal: Apply when a new project manager is provided, there is no indication the projects in trouble and there is a need to report whether the project is as opposed to where its supposed to Informal audits can apply the same criteria as formal audit but there is no need for such a in depth report or formal report.[21]

An energy audit is an inspection, survey and analysis of energy flows for energy conservation in a building, process or system to reduce the amount of energy input into the system without negatively affecting the output(s).

An operations audit is an examination of the operations of the client's business. In this audit, the auditor thoroughly examines the efficiency, effectiveness and economy of the operations with which the management of the entity (client) is achieving its objective. The operational audit goes beyond the internal controls issues since management does not achieve its objectives merely by compliance of satisfactory system of internal controls. Operational audits cover any matters which may be commercially unsound. The objective of operational audit is to examine Three E's, namely: Effectiveness – doing the right things with least wastage of resources. Efficiency – performing work in least possible time. Economy – balance between benefits and costs to run the operations

A control self-assessment is a commonly used tool for completing an operations audit.[22]

Also refer to forensic accountancy, forensic accountant or forensic accounting. It refers to an investigative audit in which accountants with specialized on both accounting and investigation seek to uncover frauds, missing money and negligence.

• Amat, O. (2008). "Earnings management and audit adjustments: An empirical study of IBEX 35 constituents". SSRN 1374232.