changeover
n. countable B2 Upper Intermediate US //ˈtʃeɪnˌdʒoʊvɝ// UK //tʃˈeɪndʒəʊvɐ// changeover
n. the process of changing from one thing to another. You use this when talking about switching systems, people, or equipment.
n. the process or period of time during which a transition from one state, system, or person to another occurs.
The changeover to the new software took all afternoon.
The factory manager warned that the changeover to the new production line would require extra staff for a week.
A smooth changeover between the outgoing and incoming administrations is essential for maintaining public trust and ensuring the continuity of critical government services.