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12-Month Intervention Plan ( Mind Maps ) - Coggle Diagram
12-Month Intervention Plan ( Mind Maps )
Phase 1: Months 1–3 – Assessment and preparation
Engineering / Technical
Conduct noise mapping in all production areas
Identify machines exceeding 85 dB(A)
Medical measures
Review past audiometric test results
Identify workers with early hearing threshold shifts
Employer responsibility
Appoint a competent OSH coordinator
Allocate budget for noise control programme
Establish a hearing conservation committee
Phase 2: Months 4–6 – Engineering controls (Primary prevention)
Install machine enclosures for high-noise equipment
Install noise barriers and sound-absorbing materials
Improve preventive maintenance to reduce mechanical noise
Redesign layout to increase distance between workers and noise sources
Engineering controls are prioritised because they reduce exposure at source and do not depend on worker behaviour.
Phase 3: Months 7–9 – Administrative controls (Primary prevention)
Implement job rotation to limit daily exposure duration
Restrict time spent in high-noise zones
Schedule noisy tasks during shorter periods
Establish designated “hearing protection zones”
Update safe work procedures
This improves work organisation and reduces cumulative exposure.
Phase 4: Months 10–12 – Medical measures and PPE (Secondary & tertiary prevention)
Medical measures
Conduct annual audiometric testing
Refer affected workers for medical evaluation
Reassign workers with confirmed hearing loss to lower-noise tasks
Training
Noise hazard awareness training
Proper use and care of hearing protection devices
PPE
Enforce use of earplugs or earmuffs
Monitor compliance through supervision
Employer responsibilities throughout the programme
Provide safe working environment
Fund engineering improvements
Ensure training and supervision
Maintain medical surveillance records
Review effectiveness every 3 months
Ensure compliance with OSHA 1994
Expected outcomes
Reduction of noise exposure below legal limits
Prevention of new noise-induced hearing loss cases
Improved worker concentration and safety performance
Compliance with Malaysian regulations
Lower compensation and medical costs
Improved organisational reputation
Conclusion
By applying the hierarchy of controls and occupational health prevention principles over a structured 12-month period, the organisation can effectively control excessive noise exposure, protect worker health, fulfil legal obligations, and achieve sustainable occupational health performance.