The National Strategic Development Plan (2019-2023) has been formulated for the implementation of the Rectangular Strategy Phase IV with the identification of the priorities, indicators and timeframe for the implementation and with the identification of mechanism for the monitoring and evaluation of the Result Framework, especially setting the responsibility of the line ministries and agencies within each angle in order to gain high benefits from ASEAN Economic Integration and to move from Lower-Middle-Income Country to an upper-Middle-Income Country in 2030 and to contribute to the achieving the Cambodian Sustainable Development Goals 2016-2030. For the preparation of NSDP 2019-2023, the RGC has used the existing procedures and mechanism as for the preparation NSDP 2014-2018 and spend a longer time period improving this national plan.