Prescriptive analytics optimizes decision-making by recommending optimal courses of action. It is important because it can increase service quality, reduce costs, and increase returns. Prescriptive analytics is done through case studies like one where The Kheri Construction Company used it to address high staff turnover. Manpower planning fulfills objectives of fully utilizing current employees and filling future needs. It involves forecasting requirements and techniques like managerial judgement, scatter plots, regression analysis, and more.