Business organisations looking to improve operational efficiency look at Business process engineering (BPR). BPR approach is always associated with radical changes to organisational structure with information technology as a primary enabling factor. However, critics of BPR suggest that not all BPR initiatives are successful, and sometimes harmful to the existing operations. Describe a BPR process. Provide examples in your discussion. Discuss two advantages and two challenges in rolling out a BPR to transform an organisation. Suggest and explain how to mitigate the challenges.