Your organization moved forward with the implementation of a custom-developed en

Your organization moved forward with the implementation of a custom-developed enterprise resources planning solution. After several issues, extensive time spent troubleshooting, and failed user adoption, the implementation was deemed unsuccessful and management decided to continue with the old legacy system.
Management is concerned about future implementations, as the failed one cost considerable financial and personnel resources. Management wants to understand the issues so the failure is not repeated in the future. They have asked you to explain the types of things that can cause a seemingly well-planned implementation to fail. Provide an explanation and at least one example of an implementation that failed in the real world, including lessons learned from that failure.