# The Build

To begin building on any AXIS ARC-Forge the machine must be [staked ](https://alloy-space.gitbook.io/alloy-space/arc-forge-science/arcforge-staking)with the **Alloy Token**. This brings the ARC **Online** and enables building.

### Build Time

When a build is started, it is assigned a random **Build Time** that is restricted to a range designated for that Class of ARC-Forge:

| ARC-Forge Type | Build Time Range (in hours) |
| -------------- | --------------------------- |
| AXIS-REC       | 6 - 12                      |
| AXIS-H         | 7 - 13                      |
| AXIS-S         | 8 - 14                      |
| AXIS-PRO       | 9 - 15                      |
| AXIS-E9        | 10 - 16                     |

{% hint style="info" %}
**Build Time** increases with each improving Class, but as shown later, the value of built parts increases as well. *An AXIS-E9 will generate far more Rare and Exotic parts than an AXIS-REC will.*
{% endhint %}

### Evaluation Stages (E-Stages)

Each ARC-Forge Class has a number of **Evaluation Stages**, which are essentially time-windows with checkpoints that are equally dispersed across the **Build Time**. Halfway through each **Evaluation Stage**, there is an instant check for success or failure of the build.

Each **Evaluation Stage** has a success rate, which **increases** with each consecutive stage. The further along in the build, the more likely it will successfully finish building.

The **First Stage Success Rate (FSSR)** is the success rate on the *first* evaluation stage. The build is evaluated for success at this stage and at all subsequent stages until completed.

* If *successful* at any stage, the part build continues to the next stage, until Build Time ends.
* If *unsuccessful* at any stage, then the build fails immediately. The ARC is placed into the idle state and a new build must be started.

![](https://2111160599-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ffggipod3jU8OdLSacyrb%2Fuploads%2F29RT2K0PU3pmKR4KC4U5%2Frecp.png?alt=media\&token=e748cb14-73cc-479d-b6ac-11c684d22377) ![](https://2111160599-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ffggipod3jU8OdLSacyrb%2Fuploads%2FoQyE727DRxLJmRhiNdYx%2Fhobbyp.png?alt=media\&token=401da7f2-2f2f-466e-80dd-fa3e15c39a08) ![](https://2111160599-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ffggipod3jU8OdLSacyrb%2Fuploads%2FDdwGWFuEGeIT3ZbHQeKU%2Fseriousp.png?alt=media\&token=3ff70fea-a8c4-489f-9ba1-7d94874b4d2e) ![](https://2111160599-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ffggipod3jU8OdLSacyrb%2Fuploads%2FGVAl0PumMlb0V7KZn1zU%2Fprop.png?alt=media\&token=de613df7-d80c-4d03-9e1c-35cfa2d2fb02)

{% hint style="info" %}
The following chart refers to the FSSR and number of stages for building Alloy Parts on a given Class of ARC-Forge.
{% endhint %}

| ARC-Forge Type | First Stage Success Rate (FSSR) | Stages |
| -------------- | ------------------------------- | ------ |
| AXIS-REC       | 91%                             | 6      |
| AXIS-H         | 92%                             | 6      |
| AXIS-S         | 93%                             | 5      |
| AXIS-PRO       | 94%                             | 4      |
| AXIS-E9        | 95%                             | 4      |

The success rate increases with each Evaluation Stage by:

> <mark style="color:green;">**(100% - FSSR)/Stages**</mark>

The AXIS-REC will increase by 1.66% per stage. And on the 6th and final stage, there is nearly a 99% chance that the build will succeed.

![6 Evaluation Stages along an 8-Hour Build Time. Each Stage has an increased Success Rate.](https://2111160599-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ffggipod3jU8OdLSacyrb%2Fuploads%2FiKmDOatsGSzyhrySUt87%2Ftimeline_evalstages.png?alt=media\&token=ef8bcd7a-ed2d-4d9e-8ba0-0857a5535b7b)
