cutover
noun[C]
uk/ˈkʌtˌəʊvər/usIT
achangefromoldcomputersystems,equipment, etc. to newones:
The cutoverleftuserswith nointerruptioninservicesduring thetransition.
achangefrom onepartof abusinessplanto the next one:
Thecompanyhas beengrowingagainthanksto a cutover of allproductiontoitstrademarkgreenlongneckbottles.