Items
The master record for everything you make, buy, or stock: parts, materials, tools, and more.
An item is the master record for anything Carbon tracks: a finished part, a raw material, a tool, a consumable. Orders, , , and inventory all point back to it. Its human-facing part number is the readable id. The underlying id is an internal key you rarely see.
An item's type, how it's replenished, and how it's tracked decide how it behaves everywhere downstream: whether it can be made or only bought, whether stock is counted, whether each unit needs a . Get the item right and the rest of the system follows.
Fields
id.rev.is the high-level strategy; is the line-level default it allows. A Buy item defaults to purchasing; a Make item can be built to order or pulled from stock. The two are related but distinct.
Tracking
The tracking type sets how units are counted. Inventory items are quantity-tracked stock; Non-Inventory items aren't counted; Serial items carry one record per unit; items are lot-tracked with their own batch numbers and dates.
Revisions
Each revision of a part is its own item record, sharing the same part number but a different revision. A design change creates a new revision rather than rewriting the old one, so jobs built against an earlier revision keep their history.
An item's , one of Standard, Average, FIFO, or LIFO, lives on its cost record, not the item itself, and decides how consumption is valued.