Explanation
Succession planning is the type of planning that minimizes impacts due to the unavailability of key staff.
Succession planning is a process of identifying and developing potential successors for key positions in an organization. It helps to ensure the continuity of leadership and critical skills in the event of staff turnover, retirement, resignation, illness, death, or any other cause of unavailability. Succession planning is an important component of business continuity management, as it helps to reduce the risk of disruption and loss of performance due to the loss of key staff. Succession planning also helps to retain and motivate high-potential employees, as well as to enhance the organization's reputation and attractiveness as an employer. Succession planning should be aligned with the organization'sstrategic objectives, culture, and values. It should also be based on a systematic assessment of the current and future needs of the organization, as well as the competencies and potential of the existing and prospective staff. Succession planning should involve the participation and commitment of senior management, human resources, and the relevant staff. It should also be reviewed and updated regularly to reflect the changing circumstances and needs of the organization.
References:
ISO/TS 30433:2021 - Human resource management - Succession planning metrics cluster1 ISO 22301 Auditing eBook, Chapter 2: Business Continuity Concepts and Principles, Section 2.4:
Business Continuity Strategy2
ISO 22301:2019 - Security and resilience - Business continuity management systems - Requirements, Clause 7.2: Competence3

Explanation
Corporate Services and Information Technology are the functions that provide a range of physical and technological infrastructure services to all other functions, such as human resources, finance, legal, procurement, facilities, security, IT systems, networks, applications, databases, etc. These functions are essential for the continuity of the organization's operations, as they support the delivery of products and services to customers and stakeholders. Therefore, they need to be included in the scope and objectives of the business continuity management system (BCMS), and their roles and responsibilities need to be defined and communicated. References: ISO 22301 Auditing eBook, Chapter 2: Business Continuity Management System (BCMS), Section 2.1: Scope and Objectives, page 23.

Explanation
Policy formulation is the BCMS process that is used to develop a business continuity policy that sets out an operating framework. According to ISO 22301, the organization shall establish a business continuity policy that is appropriate to the purpose and context of the organization and provides a framework for setting business continuity objectives. The policy shall also demonstrate top management's commitment to the BCMS and its continual improvement1. The policy formulation process involves the following steps2:
Define the scope and objectives of the policy
Identify the relevant internal and external issues and requirements
Analyze the current state of the BCMS and the gaps to be addressed
Draft the policy statement and the key principles and guidelines
Review and approve the policy by the top management
Communicate and distribute the policy to the relevant stakeholders
Monitor and update the policy as needed References:
ISO 22301:2019, clause 5.3
ISO 22301 Auditing eBook, page 24