To ensure products can handle shocks and stresses within their service life，vibration testing comes into play.As an example，this applies to：
- A mobile phone must be able to withstand bouncing around in a backpack as well as being dropped on the floor several times.If it cannot cope with this general day-to-dayuse，warranty costs will explode for the manufacturesulting in a real risk of brand deterioration and of customers looking elsewhere the nextimy。
- A satellite has to be able to survive the excessive vibrations from being launched into space.If it is faulty，the investment in the development and building of the satellite may be jeopardized。
Inorder to ensure that the products customers receive are intact and fully-functional，it is essential that they can survive the journey from when they are boxed at the factory until they arrive at the end destination.Moreover，beyond merely withstanding short-term physical forces， developers need to ensure that their products will maintain the integrity and quality that represents the brand in the longer term。
Product qualification and verification is done through extensive simulation in the development phases，but simulation is not enough.It is also necessary to do physical testing on prototypes and end-of-line items，both to validate simulated results and to prove product durability to customers。
