Simulation is the type of business continuity test that includes assessment of resilience to internal and external risks without endangering live operations. Business continuity is the ability of an organization to maintain or resume its critical functions and operations in the event of a disruption or disaster. Business continuity testing is the process of evaluating and validating the effectiveness and readiness of the business continuity plan (BCP) and the disaster recovery plan (DRP) through various methods and scenarios. Business continuity testing can provide several benefits, such as:

Improving the confidence and competence of the organization and its staff in handling a disruption or disaster

Enhancing the performance and efficiency of the organization and its systems in recovering from a disruption or disaster

Increasing the compliance and alignment of the organization and its plans with the internal or external requirements and standards

Facilitating the monitoring and improvement of the organization and its plans by identifying and addressing any gaps, issues, or risks

There are different types of business continuity tests, depending on the scope, purpose, and complexity of the test. Some of the common types are:

Walkthrough: a type of business continuity test that involves reviewing and discussing the BCP and DRP with the relevant stakeholders, such as the business continuity team, the management, and the staff. A walkthrough can provide a basic and qualitative assessment of the BCP and DRP, and can help to familiarize and educate the stakeholders with the plans and their roles and responsibilities.

Simulation: a type of business continuity test that involves performing and practicing the BCP and DRP with the relevant stakeholders, using simulated or hypothetical scenarios, such as a fire drill, a power outage, or a cyberattack. A simulation can provide a realistic and quantitative assessment of the BCP and DRP, and can help to test and train the stakeholders with the plans and their actions and reactions.

Parallel: a type of business continuity test that involves activating and operating the alternate site or system, while maintaining the normal operations at the primary site or system. A parallel test can provide a comprehensive and comparative assessment of the BCP and DRP, and can help to verify and validate the functionality and compatibility of the alternate site or system.

Full interruption: a type of business continuity test that involves shutting down and transferring the normal operations from the primary site or system to the alternate site or system. A full interruption test can provide a conclusive and definitive assessment of the BCP and DRP, and can help to evaluate and measure the impact and effectiveness of the plans.

Simulation is the type of business continuity test that includes assessment of resilience to internal and external risks without endangering live operations, because it can simulate various types of risks, such as natural, human, or technical, and assess how the organization and its systems can cope and recover from them, without actually causing any harm or disruption to the live operations. Simulation can also help to identify and mitigate any potential risks that might affect the live operations, and to improve the resilience and preparedness of the organization and its systems.

The other options are not the types of business continuity tests that include assessment of resilience to internal and external risks without endangering live operations, but rather types that have other objectives or effects. Walkthrough is a type of business continuity test that does not include assessment of resilience to internal and external risks, but rather a review and discussion of the BCP and DRP, without any actual testing or practice. Parallel is a type of business continuity test that does not endanger live operations, but rather maintains them, while activating and operating the alternate site or system. Full interruption is a type of business continuity test that does endanger live operations, by shutting them down and transferring them to the alternate site or system.