How does value affect the gain of smithing experience?
In previous Elder Scrolls games, weapons and armour would have their quality degrade and you would have to repair it with the Armorer skill to fix it. This provided a constant stream of experience which made reaching level 100 Armorer quite natural.
In contrast, Skyrim does not have weapon or armour condition ratings, and the only way to advance Smithing is through creating and improving vast amounts of new equipment. From a roleplaying perspective, this can seem a little contrived. I would like to know the following:
Does crafting higher-level equipment (Dwemer vs Iron, for example) carry a significantly higher experience reward than lower-level equipment?
Does crafting higher-cost (more bars, leather) equipment have a significantly higher experience reward, or at least has an experience reward equal to crafting an equivalent number of lower-cost equipment, such as daggers?
Does smelting bars of higher-level metals such as ebony carry a significantly higher experience reward to lower-level metals, such as iron?
By "significantly", I mean orders of magnitude, like iron being 1.0x and ebony being 5.0x, rather than slightly better, such as iron being 1.0x and ebony being 1.5x.