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The following terms are of importance to driver flighting measures.
| Term | Definition |
|---|---|
| Adoption count | The number of machines that have installed a specific driver |
| Current value | The value that has been determined by telemetry and the measure’s calculation logic at the time of evaluation |
| Device class | A specific type of component, like a graphics card or Wi-Fi chip |
| Device-class measures | Measures only applied to drivers of the same device-class |
| Ecosystem audience | A driver audience that expands the submission label’s CHID/HWID targeting to any machine with the same or identical driver |
| Flighting audience | The set of machines that are eligible for a driver in the Windows Insider Program (WIP) |
| Hardware Dev Center (HDC) | Partners submit drivers to this Microsoft service to initiate the driver approval process |
| Measure | An aggregation of telemetry scoped to a driver’s use case, to determine the driver’s quality |
| Minimum population | The smallest number of machines needed to activate a measure |
| Myriad ratio | A myriad is set of 10,000 units; a myriad ratio is a numerator and denominator normalized to 10,000 |
| Passing criteria | The minimum bar of quality that a measure’s current value must meet for the measure to succeed |
| Retail audience | The set of machines that is eligible for a driver in the general Windows ecosystem |
| Standard audience | A driver audience that uses the same targeting metadata maintains the CHID/HWID/metadata targeting in the submission label |
| Systemic measures | Measures applied to every driver that monitor the driver’s installation capability and impact on the machine |
| Telemetry | Information from a customers’ machines that is collected by Microsoft to gauge quality, triage problems, and provide insights on the ecosystem |
| Windows Insider Program (WIP) | Users opt-in to WIP for access to early feature, application, OS, and Driver updates from Microsoft. These users’ machines send all their data back to Microsoft to validate the quality of an update. |
| Windows Update (WU) | Microsoft service that distributes updates to Windows users |