The 2 terms to consider when thinking about Hand-arm vibrations and how much vibration staff are experiencing at work are the Exposure Action Value and Exposure Limit Value.
The daily exposure to vibration can be calculated by measuring the magnitude of the vibration against the duration of exposure to the vibration within an 8-hour day.
If daily exposure to vibration is within the Exposure Action Value area of the chart, employers must reduce the risk.
If the daily exposure is above the Exposure Limit Value, employers must then take immediate action to reduce your exposure to vibration.