Before revision: thumb Big bang adoption or direct changeover is the adoption type of the instant changeover, when everybody associated with the old system moves to the fully functioning new system on a given date .Eason, 1988 When a new system needs to be implemented in an organization, there are three different ways to adopt this new system: the big bang adoption, phased adoption and parallel adoption.
After revision: thumb Big bang adoption or direct changeover is when a new system is adopted instantly, with no transition period between the old and new systems .Eason, 1988 When a new system needs to be implemented in an organization, there are three different ways to adopt this new system: the big bang adoption, phased adoption and parallel adoption.