Business Impact Analysis identifies the followingActivities that deliver critical outputsWhat IT systems are considered critical and must be protectedHow many employees perform critical activitiesCause of a disruptive event

Business Impact Analysis (BIA) is a systematic process to determine and evaluate the potential effects of an interruption to critical business operations as a result of a disaster, accident or emergency. Here's how it identifies the following:

1. Activities that deliver critical outputs: BIA begins by listing out all the activities or processes carried out by the business. Then, it identifies which of these activities are critical for the business to function. These could be anything from manufacturing processes to customer service activities.

2. What IT systems are considered critical and must be protected: Once the critical activities are identified, the next step is to identify the IT systems that support these activities. These systems are considered critical and must be protected to ensure business continuity.

3. How many employees perform critical activities: BIA also identifies the number of employees involved in performing the critical activities. This is important to understand the human resource impact and plan for alternative arrangements in case of a disruption.

4. Cause of a disruptive event: BIA also involves identifying potential causes of disruptive events. These could be natural disasters, IT failures, power outages, etc. Understanding the cause helps in planning for risk mitigation and disaster recovery.