Mezzanines can be very effect means of adding work space in a facility if they are used correctly.
1. Be sure that the building is high enough to accommodate a mezzanine. Remember that under the mezzanine you need space for lighting, sprinklers and air handling.
2. Plan to put operations on the mezzanine that are largely self supporting. Moving material up and down takes space, and staff.
3. Heat travels up so build in the HVAC systems to move that air away from where people will be working
4. Plan the task on the mezzanine with ADA compliance in mind.