* Lack of sufficient planning at the start of a project;
* Difficulties with technology compatibility
(that is, new technology may not work with existing technology);
* Lack of commitment by management providing the necessary resources;
* Poorly defined project scope;
* Lack of sufficient time to complete the project
Source:
Introduction to Information Systems - Third Edition
Enabling and Transforming Business
Chapter 12 - Acquiring Information Systems and Applications
By R. Kelly Rainer, Casey G. Cegielski
Page 394