# Requirements

### Requirments

inSCADA requires hardware resources in proportion to the scale of your applications. The parameters that determine the scale of your application are effective in consuming hardware resources. They are

* Variable,Tag, I/Os Numbers,
* Number of tags with Value Expression content,
* Number of tags with Log Expression content,
* Number of Alarms,
* Number of Scheduled Script and the Script Content,
* Number of Connections,
* Number of Online Users at the same time.

inSCADA uses a minimum of 2GB of RAM and 1 GB of disk space on the system it is installed.

For small-scale projects and development activities, you can install them on a computer with the following features.

| Hardware     | Description     |
| ------------ | --------------- |
| CPU          | Intell Core i3  |
| MEMMORY      | 4 GB RAM        |
| DISK SIZE    | 100 GB          |
| OS           | Windows / Linux |
| Display Size | 1280x1024       |

inSCADA is designed for the most efficient use of hardware resources.

| Software     | Descriptions    |
| ------------ | --------------- |
| OS           | Windows / Linux |
| Java Version | 1.8             |
| Browser      | Chrome/Firefox/ |
| Database     | PostgreSQL 9.6  |
|              |                 |

{% hint style="info" %}
inSCADA is a web based application. It is therefore best practice that users run inSCADA on a network and connect to the server via a web browser on different computers.
{% endhint %}

You can also determine the scale of your applications by comparing them with the features of our sample test equipment below.

For example, we ran an application with 4 Modbus TCP Connections, 2 DNP3 Outstations Connections, close to 2000 Value expression, and Log expression with approximately 5,000 variables in a 4 GB Linux Mint computer with i5 processor. Data updates in screen could be under even 1 sec.