Big bang adoption is the adoption type of the instant changeover, when everybody associated with the new 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. In case of parallel adoption the old and the new system are running parallel, so all the users can get used to the new system, and meanwhile do their work using the old system. Phased adoption means that the adoption will happen in several phases, so after each phase the system is a little nearer to be fully adopted. With the big bang adoption, the switch between using the old system and using the new system happens at one single date, the so-called instant changeover of the system. Everybody starts to use the new system at the same date and the old system will not be used anymore from that moment on.
The big bang adoption type is riskier than other adoption types because there are fewer learning opportunities incorporated in the approach, so quite some preparation is needed to get to the big bang (Eason, 1988). This preparation will be described below, illustrated by the process-data model of the big bang adoption.
Read more about Big Bang Adoption: Table of Concepts, Big Bang, Techniques, Advantages and Disadvantages, Risks
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