No blanket working load recommendation can be made because it depends on the application and conditions of use, especially potential danger to personnel. It is recommended that the user establish working loads and safety factors based on professional and experienced assessments of risks. The working load is a guideline for the use of a rope in good condition for non-critical applications and should be reduced where life, limb, or valuable property is involved, or exceptional service such as shock, sustained loading, severe vibration, etc. The Cordage Institute specifies that the safe working load of a rope shall be determined by dividing the minimum tensile strength by the safety factor. Safety factors range from 5 to 6 for non-critical uses, and up to 12 to 15 for life lines.