[ADD] inventory: Terminologies

https://docs.google.com/document/d/1covxEIrLjm0TPA2GmZhNwcxtLcHG1oiVbzPjsZjLwqc/edit

inventory/overview/terminologies.rst

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+=============
+Terminologies
+=============
+
+- **Warehouse**: A warehouse in Odoo is a location where you store
+  products. It is either a physical or a virtual warehouse. It
+  could be a store or a repository.
+
+- **Location**: Locations are used to structure storage zones within a
+  warehouse. In addition to internal locations (your warehouse),
+  Odoo has locations for suppliers, customers, inventory loss
+  counter-parts, etc.
+
+- **Lots**: Lots are a batch of products identified with a unique
+  barcode or serial number. All items of a lot are from the same
+  product. (e.g. a set of 24 bottle) Usually, lots come from
+  manufacturing order batches or procurements.
+
+- **Serial Number**: A serial number is a unique identifier of a
+  specific product. Technically, serial numbers are similar to
+  having a lot of 1 unique item.
+
+- **Unit of Measure**: Define how the quantity of products is 
+  expressed. Meters, Pounds, Pack of 24, Kilograms,… Unit of
+  measure of the same category (ex: size) can be converted to each
+  others (m, cm, mm) using a fixed ratio.
+
+- **Consumable**: A product for which you do not want to manage the
+  inventory level (no quantity on hand or forecasted) but that you
+  can receive and deliver. When this product is needed Odoo suppose
+  that you always have enough stock.
+
+- **Stockable**: A product for which you want to manage the inventory
+  level.
+
+- **Package:** A package contains several products (identified by their
+  serial number/lots or not). Example: a box containing knives and
+  forks.
+
+- **Procurement**: A procurement is a request for a specific quantity
+  of products to a specific location. Procurement are automatically
+  triggered by other documents: Sale orders, Minimum Stock Rules,
+  and Procurement rules. You can trigger the procurement manually.
+  When procurements are triggered automatically, you should always
+  pay attention for the exceptions (e.g. a product should be
+  purchased from a vendor, but no supplier is defined).
+
+- **Routes**: Routes define paths the product must follow. Routes may
+  be applicable or not, depending on the products, sales order
+  lines, warehouse,… To fulfill a procurement, the system will
+  search for rules belonging to routes that are defined in the
+  related product/sale order.
+
+- **Push Rules**: Push rules trigger when products enter a specific
+  location. They automatically move the product to a new location.
+  Whether a push rule can be used depends on applicable routes.
+
+- **Procurement Rules** or **Pull Rules**: Procurement rules describe
+  how procurements on specific locations should be fulfilled e.g.:
+  where the product should come from (source location), whether the
+  procurement is MTO or MTS,...
+
+- **Procurement Group**: Routes and rules define inventory moves. For
+  every rule, a document type is provided: Picking, Packing,
+  Delivery Order, Purchase Order,… Moves are grouped within the
+  same document type if their procurement group and locations are
+  the same.
+
+- **Stock Moves**: Stock moves represent the transit of goods and
+  materials between locations.
+
+- **Quantity On Hand**: The quantity of a specific product that is
+  currently in a warehouse or location.
+
+- **Forecasted Quantity**: The quantity of products you can sell for a
+  specific warehouse or location. It is defined as the Quantity on
+  Hand - Future Delivery Orders + Future incoming shipments +
+  Future manufactured units.
+
+- **Reordering Rules**: It defines the conditions for Odoo to
+  automatically trigger a request for procurement (buying at a
+  supplier or launching a manufacturing order). It is triggered
+  when the forecasted quantity meets the minimum stock rule.
+
+- **Cross-Dock**: Cross-docking is a practice in the logistics of
+  unloading materials from an incoming semi-trailer truck or
+  railroad car and loading these materials directly into outbound
+  trucks, trailers, or rail cars, with no storage in between. (does
+  not go to the stock, directly from incoming to packing zone)
+
+- **Drop-Shipping**: move products from the vendor/manufacturer
+  directly to the customer (could be retailer or consumer) without
+  going through the usual distribution channels. Products are sent
+  directly from the vendor to the customer, without passing through
+  your own warehouse.
+
+- **Removal Strategies**: the strategy to use to select which product
+  to pick for a specific operation. Example: FIFO, LIFO, FEFO.
+
+- **Putaway Strategies**: the strategy to use to decide in which
+  location a specific product should be set when arriving
+  somewhere. (example: cables goes in rack 3, storage A)
+
+- **Scrap**: A product that is broken or outdated. Scrapping a product
+  removes it from the stock.