The liner must be designed and built to withstand extended high temperature cycles.

These rhythms include the sleepwake cycle, hormone production, and core body temperature cycles.

Avoiding solder fatigue, spring contacts are resistant against shock, vibration and corrosion, and provide high temperature cycling in harsh industrial environments.

Temperatures cycle regularly up and down through the day, as controlled by the person's circadian rhythm.

This process may involve induced-damage testing, fatigue testing, corrosion growth, or temperature cycling to accumulate certain types of damage in an accelerated fashion.