Big Bang Vs Phased implementation of ERP

A big bang implementation and a phased implementation are two different approaches to implementing an ERP system. Here are the pros and cons of each approach:

Big Bang Implementation: Pros:

  • Quicker deployment: With a big bang approach, the entire ERP system can be deployed all at once, which can be completed faster than a phased approach.
  • Lower overall costs: A big bang approach typically requires fewer resources, so it can be more cost-effective in the long run.
  • Easier to manage change: With all changes happening at once, it can be easier to manage and control the overall change process.


  • High risk: A big bang approach can be very high risk, as there is a large amount of change happening all at once.
  • More disruption: All departments and functions of a business are impacted at once, leading to a high level of disruption to the normal operation of the organization.
  • Potential for delays: If any issues arise during the implementation process, the entire implementation can be delayed, which can be costly and time-consuming.

Phased Implementation: Pros:

  • Lower risk: With a phased approach, the implementation can be broken down into smaller, manageable stages, reducing the overall risk of the implementation process.
  • Less disruption: Only a portion of the organization is impacted at a time, so the level of disruption is reduced compared to a big bang approach.
  • Ability to refine and optimize: As each phase of the implementation is completed, the organization can refine and optimize the ERP system, making improvements as they go.


  • Longer implementation time: With a phased approach, the implementation takes longer as each phase must be completed before moving onto the next.
  • Higher costs: As the implementation takes longer, the costs can be higher as more resources are required to complete the process.
  • Potential for inconsistent data: As the ERP system is implemented in stages, there may be inconsistencies in data across the different phases, which can be challenging to manage.

In conclusion, both the big bang approach and the phased approach have their pros and cons, and the best approach for a particular organization will depend on its specific requirements and circumstances.

Leave a Comment