This form is opened when you press the Safety Factor button 
on the Case Compression form.
Environment Safety Factors
The various options in the pulldown lists will have had values assigned to them on the Environment Safety Factor Options form. As you choose different settings the Safety Factor value will be updated. However, you are then able to override this calculated value with one of your own.
Print coverage
Choose from None, Light, Medium and Heavy.
Product life
Choose from Short, Medium and Long.
Storage conditions
Choose from Ambient, Humid, Chilled and Frozen.
Destination
Choose from Domestic, International and Intercontinental.
Safety factor
As mentioned above, this value is automatically calculated, but you can override it if required.