Strain survey is conducted for helping engineers to understand static and linearly moving parts designs can be improved to increase life and performance, while reducing material costs. These tests also used for rotating parts are considerably more difficult due to the very high "g″ load environment that both the device under test and the instrumentation must withstand. The device under test is usually designed and subjected to finite element analysis, which can locate and estimate nominal stress points. However, critical parts must be tested to verify actual stresses.