> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mangrovesystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Inventory Fundamentals

> Key credit inventory concepts used in Mangrove

#### Issuance

An issuance in Mangrove refers to a group of active, tradable credits within your inventory. These credits represent carbon production that has been demonstrated in a project within a specific production period.

#### Customer

A buyer (or potential buyer) of credits from your inventory. Customers make orders and receive deliveries.

#### Order

An order represents a request made by a customer for credit inventory. Each order contains details such as the customer's information, the order terms and status, and the deliveries included in the order.

```mermaid theme={null}
    flowchart LR;
      Customer --- Order;
      Order --- Delivery1[Delivery 1];
      Order --- Delivery2[Delivery 2];
      Order --- Delivery3[Delivery 3];
```

#### Delivery

Deliveries are created within the Orders that Customers place — each Order can hold multiple Deliveries, from various Projects. A delivery can be a transfer or a retirement.

```mermaid theme={null}
    flowchart LR;
      Order --- Delivery;
      Delivery --- Issuance1[Issuance];
      Delivery --- Issuance2[Issuance];
      Delivery --- Issuance3[Issuance];
      Issuance1[Issuance] --- Project1[Project];
      Issuance2[Issuance] --- Project1[Project];
      Issuance3[Issuance] --- Project2[Project];
```