External Visual Inspection consists in a non-destructive optical inspection. Binoculars with magnification between 1x and 60x and with a relatively large and accessible field of view are employed for this purpose.
The aim of an EVI (external visual inspection) is to verify the conformity of the exterior of electrical, electronic and electromechanical components (EEE parts) with the acquisition document. The following aspects should be considered:
- Marking
- Aspects of Materials
- Workmanship
- Sealing
- Leads
- Feedthroughs
The EVI (External Visual Inspection) is usually the key tool to assess the quality of parts, e.g. during a customer source inspection (Buy-off). Additionally, this inspection is of great relevance and also especially indicated for such large test sequences as 100% screening, qualification and evaluation testing, counterfeit investigation and many others. It is also utilised to inspect damage caused by handling, assembly and/or testing of the packaged device.
At ALTER we count on a highly trained team focused on EVI inspections and having all the necessary knowledge and understanding of the test methods used for space systems, such as:

