Criteria for determining improvement priorities after work environment measurement results

After the results of the work environment measurement
Criteria for determining improvement priorities

Once measurement values ​​are obtained, do not merely indicate whether the limit has been exceeded; instead, classify the measures into immediate action, short-term improvement, and follow-up management, and set the responsible person and deadline. Even if exposure limits are below the threshold, preventive improvements may be considered in cases of highly hazardous substances, repeated exposure, or reported symptoms.

Management is not complete simply because exposure limits are below the threshold. If the trend of results is rising, if you are handling substances with significant health impacts, or if workers report symptoms, review the need for additional improvements in the risk assessment and health management procedures.

Confirmation items	Confirmation question	Impact on priority
Measurements and Exposure Standards	How does it exceed or approximate, and what is the increase or decrease compared to the previous measurement?	Excessive and upward trends increase priority
Harmfulness	Is it a substance that requires particularly strict management, such as due to carcinogenicity or reproductive toxicity?	Review for preventive improvement even with low measurements
Exposure time and frequency	Is it continuous work, concentrated at specific times, or does it differ by shift?	Prioritize processes involving repeated and long-term exposure
exposed persons	Are surrounding workers and contract workers affected in addition to the direct workers?	The wider the scope of influence, the higher the priority.
Health and On-Site Signals	Do you have any concerns regarding odor, irritation, headache, etc., or any findings from the health examination?	Rapid on-site verification separate from the figures
Measurement representativeness	Was it measured under normal production volume, representative working hours, and equipment operating conditions?	If representativeness is low, additional verification is required.

Record Example 1. Process Exceeding Exposure Limits

Process: Washing / Hazardous Factor: Organic Solvent / Result: Exposure Limit Exceeded / Affected Personnel: 4 Direct Workers · 2 Adjacent Workers / Temporary Measures: Adjustment of work hours, access control, reconfirmation of appropriate protective equipment / Root Cause: Sealing of wash tank and improvement of local exhaust ventilation / Responsible: Production Team · Facilities Team / Statutory Submission Deadline: Managed separately based on the date of sample collection / Verification of Effectiveness: Re-measure if necessary after verifying equipment performance.

As such, legal follow-up measures, on-site temporary measures, and facility improvements and effectiveness verification must be separated rather than mixed into a single line to check the progress status.

Record Example 2. Process that increased but is below the standard

Process: Raw material weighing / Result: Below exposure limit but increased compared to the previous time / Field Signal: Increased workload and perceived dust levels / Action: Verify hood location and airflow, inspect input methods and cleaning procedures / Completion Deadline: Within 30 days / Effectiveness Verification: On-site observation, worker feedback, comparison of trends with subsequent measurement results.

Preventive improvement does not imply that a legal violation has occurred, but rather is a management approach aimed at maintaining current levels of control and preventing deterioration. The meeting minutes specifically record the reasons for the improvement decision using figures, work changes, and feedback from the field.

STEP 1. Regroup results by process, operation, and hazardous factor.

It is difficult to determine which tasks need to be fixed first by looking only at departmental averages or the results for the entire workplace. Instead of ending with a department name like 'Painting Team,' organize tasks by unit, such as 'Mixing Tank Input – Organic Solvent – ​​4 times a day.' Even within the same process, separate tasks with different exposure conditions, such as raw material input, washing, and equipment maintenance.

STEP 2. Separate targets for statutory immediate action from targets for internal improvement.

For processes exceeding exposure limits, we prioritize managing necessary measures, such as appropriate facility and equipment improvements or health examinations, as well as submission deadlines. Separately, items that are below limits but exhibit an upward trend, are highly hazardous substances, involve reported symptoms, or show equipment performance degradation are classified as targets for internal preventive improvement. Mixing these two lists may cause items with statutory deadlines to be pushed down the list by general improvement tasks.

STEP 3. Score risk and urgency together.

Classifying measurements, hazards, exposure frequency, number of subjects, and health/field signals into high, medium, and low levels, respectively, makes it easier to explain the basis for judgment during meetings. However, the sum of the scores does not replace statutory obligations, and excess processes and imminent risks are prioritized regardless of the score.

STEP 4. Designate temporary measures and fundamental measures separately.

If facility improvements require time, temporary measures such as adjusting work hours, restricting access, enhancing ventilation, and providing appropriate protective equipment may be implemented first. However, to prevent these temporary measures from becoming the final solution, the person in charge, budget, and completion date for fundamental measures—such as replacement, containment, isolation, and local exhaust ventilation improvements—must be recorded separately.

STEP 5. Close until you verify the effect, not just complete.

Improvements are not considered complete merely because equipment has been installed or training has been conducted. We verify whether risks have been reduced through ventilation airflow, actual worker usage, reductions in odors and dust, worker feedback, and re-measurements if necessary. If the effects are insufficient, we reschedule additional measures and re-verification.

priority	Improvement example	Proof of completion
1. Removal/Replacement	Cessation of hazardous substances, change to low-hazard ingredients	Purchase history, MSDS, change approval records
2. Engineering Control	Sealed, isolated, local exhaust, automated, leak prevention	Before and after photos of the equipment, performance inspection records
3. Administrative Control	Adjustment of work hours, personnel, movement patterns, and cleaning methods	Work standard documents, work schedules, training logs
4. Personal Protective Equipment	Management of selection, fit, and replacement cycle of protective equipment suitable for hazardous agents	Payment ledger, basis for selection, inspection records

The production department verifies processes and feasibility, the facilities department handles equipment measures and the budget, the health manager manages exposure and health signals, and the safety manager verifies risk assessment and implementation management. It is advisable to clearly assign a person responsible for each measure rather than having a single department finalize the results alone.

Expressing below the standard as 'no risk'
It means that it is below the standard under the conditions and control level at the time of measurement, not that there is no risk under all working conditions.

2. Do not compare with previous results and trends
If the figures for the same process continue to rise, you must check the equipment performance and changes in workload.

3. Concluded solely by the provision of protective equipment
We first examine the possibility of improvements that reduce the exposure itself, such as substitution, sealing, and ventilation.

4. No person in charge or completion deadline
Instead of 'ventilation improvement needed,' record the equipment name, measures taken, person in charge, budget, and completion date.

5. Results were announced, but improvement plans were not shared.
It provides guidance to help workers understand current risks, protective measures, and improvement schedules.

6. Do not verify the effect after completing the measure
Since the installation of equipment and the actual reduction in exposure may differ, we keep a record of the effectiveness verification.

ranking	Judgment signal	Practical measures
1. Immediate control	Exceeding exposure limits, acute risk, warning signs of serious symptoms or accidents	Review of immediate measures such as work stoppage and isolation, temporary protection, expert review, and statutory follow-up procedures
2. High-risk improvement	Highly hazardous substances, approaching standards and on an upward trend, exposure to a large number of workers	Prioritize engineering improvements such as replacement, airtightness, and local exhaust, and designate a budget and person in charge.
3. Short-term improvement	Repeated exposure to specific tasks or time periods, complaints of on-site discomfort and symptoms	Measures feasible within 30 days regarding work methods, workflow, ventilation, cleaning, breaks, etc.
4. Tracking Management	Below the standard or higher than before, scheduled process change	Interim inspection before the next measurement, record of changes in equipment performance and working conditions
5. Maintenance	Below stable standards, control measures operating normally	Maintaining current controls, worker guidance, and regular checks

☐ Did you separate the processes exceeding exposure limits from the statutory submission deadlines first?
☐ Have highly hazardous factors, such as carcinogenicity and reproductive toxicity, been separately indicated?
☐ Have you verified the number of exposed workers, exposure time, and the highest exposure tasks?
☐ Were symptom complaints, special health examinations, and accident information reviewed together to the necessary extent?
☐ Were fundamental and engineering improvements, such as alternatives, sealing, and ventilation, considered first rather than protective equipment?
Have the person in charge, completion deadline, budget, temporary measures, and supporting documents for each measure been determined?
☐ Have you determined the date and method to re-verify the effects after completion?

item	Record example
Process and hazardous factors	Mixing process / Organic solvent
Basis for judgment	Measurements · Exposure limits · Hazards · Number of exposed individuals · Symptoms
action	Verification of local exhaust performance and sealing reinforcement
Responsibility/Timeline	Facilities Team / September 18
Verify the effect	Wind speed verification, on-site interviews, and re-measurements if necessary

If you need to design organizational safety and health operations and mental health support together, please contact Nudge EAP.

Company Inquiry →

· Korea Occupational Safety and Health Agency, Workplace Work Environment Measurement Inspection Data
· National Law Information Center, Article 188 of the Enforcement Rules of the Occupational Safety and Health Act

This article provides general practical information. As applicable obligations may vary depending on the workplace, hazardous factors, and measurement results, please consult with occupational health experts and the competent authority for the latest standards. Standards verified on: September 2, 2026.