Under what circumstance can a practitioner change an assurance engagement?

A practitioner can change an assurance engagement when there is a change in circumstances affecting users' requirements because this situation may necessitate a different approach or type of engagement to better fulfill the needs of the users. Users rely on the assurance provided based on their specific needs and situations. If these requirements change—for instance, if there is a shift in regulations, market dynamics, or stakeholder expectations—then the nature and scope of the engagement may need to be adjusted to ensure that the assurances provided remain relevant and useful.

This capability to adapt engagements based on changing user requirements aligns with the core principles of providing reliable, relevant, and timely assurance. It focuses on ensuring that the audit or assurance work performed meets the current needs and expectations of its intended users, thus maintaining the integrity and credibility of the engagement.