Industrial hygiene has been defined as “that science and art devoted to the anticipation, recognition, evaluation, and control of those environmental factors or stresses arising in or from the workplace, which may cause sickness, impaired health and well-being, or significant discomfort among workers or among the citizens of the community.”

Industrial hygienists use environmental monitoring and analytical methods to detect the extent of worker exposure and employ engineering, work practice controls, and other methods to control potential health hazards.

The work environment is a component of workplace hygiene that includes physical, chemical, biological, ergonomic, and psychological elements that may have an impact on the workforce's safety and well-being.

Occupational health has a strong emphasis on prevention and is concerned with all aspects of health and safety at work.

There are many factors that affect a worker's health, such as workplace risks for cancer, accidents, musculoskeletal illnesses, blood circulation disorders, stress-related disorders, and other infectious diseases.

According to the Minister of Manpower Regulation No. 5 of 2018 (Article 2), employers are required to carry out the OHS requirements for the Work Environment. The conditions for monitoring and measuring the work environment based on the Minister of Manpower No. 5 of 2018 (Article 3) are:

1. Controlling the Physical and Chemical Factors to be below the Threshold Value.
2. Controlling Biological Factors, Ergonomic Factors, and Work Psychology Factors to meet standards / norms.
3. Provide Hygiene facilities and Hygiene facilities in a clean and healthy Workplace.

Internal inspection or testing, as mentioned in Regulation of the Minister of Manpower of the Republic of Indonesia Number 5 of 2018 Article 59 paragraph 2, is done to measure the amount of exposure in accordance with the risk of the work environment and does not void the requirement of the workplace to take measurements with outside parties.

Furthermore, Article 62 states that "Regular inspections or tests are carried out externally at least once a year or in accordance with risk assessment or provisions of laws and regulations."