[4] Companies must now consider sustainability when determining how their packaging products will be reused or recycled at the end of their journey.[4] Unit loads move via an unpredictable combination of many types of vehicles and storage areas, and the exact set is difficult to predict.Factors considered in unit load systems-based design include: Often a few inexpensive additions to the packaging can stabilize or stiffen a critical part and give good unit-load performance at a low cost.Standards provide institutional memory of the many conditions in real logistic trains, and collect the best practices for design and testing unit loads.The standard describes major parts of the logistic path, including storage, ship, air, truck, forklift and sling (i.e. ship-to-ship and parachute).However, similar marking standards, safety, stability, volumetric efficiency, weight limits and impact resistance are routinely needed in commercial logistics.