Schematics

Schematics are the blueprints that allow the Inquisitor to craft items. They can be bought from merchants or looted in various locations. Once the Arcanist is acquired at Skyhold, masterwork armors and weapons can be crafted. Adding masterworks to pieces is completely optional. Note that schematics from downloadable content are also included on this page.

Further, When you begin the inquisition, your blacksmith will have the ability to craft armor and weapons. The smith also can craft upgrades that will fit in specific slots on any given weapon or armor piece. However, once you go to Skyhold you get a Dwarven arcanist named Dagna, who has skills to make runes that will add elemental damage to different weapons.

Schematics for equipment fit into one of three tiers.

Tier 1 schematics yield tier 1 gear, and so on. With higher tiers, items can get more and more powerful, but you will have to spend more crafting materials to make the item.

Tier 1 weapon and armor schematics (typically) will  have two slots for crafting materials, and tier 3 schematics will have four slots for materials,which allows you to heavily customize the final piece but overall it will cost more for materials for each slot.

Helmets and upgrades are one exception. They don't gain more slots on their respective schematics, but only increased material requirements.

Weapon schematics
There are seven subsections under weapon crafting: one-handed weapons, two-handed weapons, staves, daggers, bows, shields, and weapon runes. Weapons can be crafted for each class, and they are class restricted only. Runes are crafted at the same crafting station as weapons.

Armor schematics
There are four subsections under armor crafting: helmet, light armor for mages, medium armor for rogues, and heavy armor for warriors. Helmets have only race restriction, while armors have class restriction and occasionally race or character restriction.