When the degree of risk can be weighed up against the cost, in terms of time, money and difficulty of implementing control measures. If the cost outweighs the risk, than it is deemed inappropriate for an employer to implement the measures to prevent the risks.

An examination of the potential risks in the workplace, with the aim of assessing whether enough precautions have been put in place to prevent harm. A risk assessment focuses on the relationship between the worker, the work being carried out, the equipment being used and the conditions of the working environment.

The process of putting control measures into practice and monitoring the results, with the intention of reducing, or eliminating, the potential risks to health and safety.

Ways in which hazardous substances can enter the body, including inhalation, injection, ingestion and absorption.