Hershey spent $115 million on a failed enterprise system implementation attempt of SAP R/3, Siebel CRM, and Manugistics supply chain applications during the Halloween season, which caused huge candy disruptions in 1999.

This failed attempt prevented Hershey from delivering $100 million worth pf Hershey Kisses for Halloween that year, causing a third-quarter sales drop of 12.4 percent. Earnings that year were off by 18.6 percent (compared with the previous year), and that caused the stock price to fall by 8 percent?

 

Given the description of Hershey's failed enterprise system implementation from the which of the four challenges of the enterprise system described in the seem to best explain what happened?