Performance measurement in the public sector aims to increase transparency and accountability. It involves quantifying the effectiveness and efficiency of programs and processes using various tools. Some key challenges include linking outputs to outcomes, comparing measures across different programs, and quantifying qualitative objectives. Additionally, a large proportion of costs are not easily traced to outputs and outcomes, and balancing comprehensive versus concise performance reporting can be difficult. Overall, performance measurement in the public sector faces greater challenges than the private sector due to multiple objectives rather than pure profit-focus.