Machine Busyness

The busyness metric is a machine indicators to make informed job submission decisions relating to Quantinuum Systems. There are two indicators - Organizational Queued Credits and Machine Usage - now available on the Nexus backends page and via the Nexus API.

Both indicators should be considered prior to any decision on the machine instance to target for an execute job.

Indicators

There are two indicators, Organizational Queued Credits and Machine Usage, reported to users within the Nexus portal. Each indicator is a separate column on the device page view.

Device view within Nexus the Nexus portal.

Organization Queued Credits

This metric shows queued Hardware Quantum Credits (HQCs) for the user’s organization. Since hardware is accessed via a fair queue system that balances organizations equitably, this is the most reliable representation for queue time.

Machine Usage

This is an indicator for the number of different organizations with jobs in the queue for a specified machine. Fewer organizations result in a shorter queue time for the user’s organization.

Example

The table below provides guidance on selecting machine instances based on indicators.

	H2-1	H2-2	Recommendation
1	5 jobs ahead (Org) Light overall usage	10 jobs ahead (Org) Light usage	Submit to H2-1 – Fewer jobs ahead within your org
2	5 jobs ahead (Org) Light overall usage	5 jobs ahead (Org) Moderate overall usage	Submit to H2-1 - Fewer other orgs in queue for that machine
3	10 jobs ahead (Org) Light overall usage	0 jobs ahead (Org) Moderate overall usage	Submit to H2-2 – No jobs ahead within your org, even if there are more orgs queue