Creep deformation and failure in high temperature structures is a serious problem for industry and is becoming even more so under the current increasing pressures of power, economics and sustainability. This book presents the development of in-house FE software for creep damage analysis. A novel in-house FE software was developed through the use of Continuum Damage Mechanics (CDM) and finite element method (FEM) in conjunction with an advanced engineering computer programming language (Fortran 2003) based on an objected oriented programming (OOP) approach.