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What is the Big Bang theory in ERP implementation?

When companies layout a plan for their ERP implementation there are two options they will look into. That is, they have the option to choose the big bang theory where the installation of ERP systems of all modules happens across the entire organization at once or the phased out module-wise implementation.

The big bang approach promises to reduce the integration cost in the condition of thorough and careful execution. Majority of the ERP implementations are carried out in big bang way.

When the question comes about whether an organization should adopt the big bang theory, we can't generalize the theory for it. For big organizations, Big Bang theory is the best choice. Mostly decision on this depends on the readiness audit result, available strength of consulting human, etc.