The Critical Raw Materials Concept: Subjective, Multifactorial and Ever-Developing

Abstract

Criticality analysis has established itself as a multifactorial, action-oriented, socio-economic raw materials scarcity assessment method which is subject to continuous development. A raw material is critical when its supply is at risk and a company or economy is vulnerable to supply restrictions of that raw material. The binary labelling of raw materials as either critical or not delivers a strong message. However, each raw material has a characteristic risk profile which may not be described by an aggregated criticality score and a discrete treshold value. A differentiated interpretation allows for a deeper understanding of the raw material supply situation and for the adoption of appropriate measures. Criticality should be understood as a continuum, subjective to the raw material system in question. A harmonised criticality methodology presented in the industrial guideline on resource efficiency (VDI 4800-II) allows for a flexible application of the concept.