This article discusses software internally used by Apple.
Acquiring a copy without Apple's consent is illegal and may result in being scammed.
The iPhone 5 Screening Tool is an application available both to GSX (Apple Global Service Exchange), and Apple Employees. This app was used for hardware quality testing of iPhones. According to official documentation it should only be used for the iPhone 5 Sleep/Wake Button Replacement Program, but does feature a variety of other tests. The Screening Tool was used to record the cosmetic and functional condition of the iPhone prior to repair. iOS 7.1 or later is required.
This app comes in an enterprise IPA form, and can be installed like any other IPA (Either via iTunes, or any other application that is capable of installing IPAs)