Abstract: The current Prime Minister, Datuk Seri Najib Tun Abdul Razak emphasizes that his administration must give due focus on delivering results or outcome rather than input or output. Such expectation requires the role of Implementation Coordination Unit of the Prime Minister’s Department (ICU) to go beyond its intrinsic role which involves coordination of development program and project implementation. Ensuring that the target group or stakeholder realizes the desired outcomes and impact of all program and projects will be another top agenda for ICU. Thus, this study attempts to discuss the importance of outcome and impact evaluation of government program and project and its potential challenges.