They are proven. They rely on reliable equipment.

We've proven you can make a consumer product with RF that is reliable.

This Soyuz rocket has proven to be very reliable and it has a very good record.

It would give more reliable predictions.

He has proven to be an excellent and reliable teammate on a terrific Pistons team.

We think that in a dark, smoke-filled atmosphere that this will go a long way to ensuring the successful evacuation of the mine.