Hershey Foods implemented an ERP system in 1999 that led to major problems. The key issues were:
1) Modules were simultaneously implemented instead of sequentially, leading to integration problems.
2) Training and testing were inadequate.
3) Peak season was chosen for the implementation.
4) Top management lacked IT expertise and did not properly oversee the project.
5) Problems were exacerbated by the looming Y2K issue and demand from retailers.
The failed implementation resulted in delivery delays, lost revenue, and excess inventory. Hershey later took steps to stabilize the systems and implement improvements.