This document identifies: - principles for determining critical positions by using workforce segmentation approaches [see ISO 30409]; - measures to determine the impact of critical positions, and the performance of people hired into these positions, on organizational value creation and performance. This document is intended to be scalable to the needs of any organization regardless of size, industry or sector and is relevant to people with an interest in workforce planning; organizational design and development; talent management, succession planning, and recruitment; and metrics and human capital reporting.