1.1 The concept of assurance and non-assurance engagements

Assurance engagements and non-assurance engagements are two distinct types of engagements performed by professional auditors and accountants.
Assurance Engagements: Assurance engagements are conducted to enhance the credibility and reliability of information. The primary objective of an assurance engagement is to provide an independent assessment or opinion on the reliability of a subject matter. This could include financial statements, internal control systems, compliance with regulations, or other types of information.
Assurance engagements typically involve the following key elements:

1. Subject Matter: It refers to the information or the area under review, such as financial statements, internal controls, or sustainability reports.
2. Criteria: These are the standards or benchmarks used to evaluate the subject matter. For financial statements, the criteria are usually established by accounting standards or generally accepted accounting principles (GAAP).
3. Evidence: The auditor gathers sufficient and appropriate evidence to support their opinion or conclusion. This evidence can be obtained through various procedures like inspection, observation, inquiry, and analytical procedures.
4. Conclusion or Opinion: Based on the evidence gathered, the auditor provides an independent conclusion or opinion on the reliability of the subject matter. The opinion can be unmodified (clean opinion), modified (qualified or adverse opinion), or a disclaimer of opinion.

Examples of assurance engagements include financial statement audits, reviews of financial statements, examination of internal controls, and audits of sustainability reports.

Non-Assurance Engagements: Non-assurance engagements, also known as consulting or advisory engagements, involve providing professional advice or services to clients without expressing an independent opinion or conclusion. These engagements are focused on assisting clients in improving their operations, solving problems, or providing specialized expertise.

In non-assurance engagements, the accountant or consultant does not express an opinion on the reliability of the information. Instead, they work closely with the client to understand their needs, provide recommendations, and help implement solutions.

Examples of non-assurance engagements include management consulting, tax advisory services, forensic accounting, due diligence reviews, business valuation, and financial advisory services.