Design lifeThe design life of a component or product is the period of time during which the item is expected by its designers to work within its specified parameters; in other words, the life expectancy of the item. It is not always the actual length of time between placement into service of a single item and that item's onset of wearout. Another use of the term design life deals with consumer products. Many products employ design life as one factor of their differentiation from competing products and components.
Truck classificationTruck classifications are typically based upon the maximum loaded weight of the truck, typically using the gross vehicle weight rating (GVWR) and sometimes also the gross trailer weight rating (GTWR), and can vary among jurisdictions. In the United States, commercial truck classification is determined based on the vehicle's gross vehicle weight rating (GVWR). The classes are numbered 1 through 8. Trucks are also classified more broadly by the Federal Highway Administration (FHWA), which groups classes 1 and 2 as light duty, 3 through 6 as medium duty, and 7 and 8 as heavy duty.
Véhicule articuléA semi-trailer truck, also known as a semi-truck, (or semi, big rig, tractor-trailer, or eighteen-wheeler) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. The main difference between tractor units in Europe and North America is that European models are cab over engine (called "forward control" in the United Kingdom), while the majority of North American trucks are "conventional" (called "normal control" or "bonneted" in the UK).
Durabilité (produit)La durabilité est la capacité d'un produit physique à rester fonctionnel, sans nécessiter de maintenance ou de réparation excessive, lorsqu'il est confronté aux défis d'un fonctionnement normal au cours de sa . Il existe plusieurs mesures de durabilité en cours d'utilisation, y compris la durée de vie, la durée d'utilisation et le nombre de cycles opérationnels. En économie, les biens à longue durée de vie sont appelés biens durables. La durabilité du produit est conditionnée par une bonne réparabilité et en conjonction avec la maintenance.
