In activity-on-arrow diagramming, an activity with zero duration used to express a precedence relationship that can't otherwise be dia?grammed. It is shown graphically with a dashed arrow.
The packing material used to protect a product from damage during transport. Some industries use the term to refer specifically to returnable packaging only.
1) A measurement of time or amount of use before a product needs repair or replacement. 2) One of theeight dimensions of quality that refers to the length of a product's economic life.