Lucent Technologies underwent an HR restructuring in 1999-2001 due to failures to evolve with changing market dynamics and integrate acquired companies. The restructuring involved centralizing HR functions, standardizing global policies, simplifying operations into four key businesses, and implementing a new organizational structure and service delivery model to enable faster decision-making and develop a global culture. Resistance to change was addressed by communicating changes and encouraging online training. The new structure aimed to streamline processes, reduce workforce costs, and better align HR with business strategy.