The number of open right half plane poles of the LTI system is equal to the number of sign changes from top to bottom in the first column of the determinants in RH table the number of sign changes from top to bottom in the second column of the determinants in RH table the number of sign changes from left to right in the coefficients of the characteristic equation zero For the second order systems* Necessary condition of the Routh Hurwitz criteria implies sufficient condition Stability can not be determined using Routh Hurwitz criteria Asymptotic stability is always guaranteed BIBO stability implies asymptotic stability