Despite the Widely Held Perception That IT/IS Systems Can 'Add

Despite the widely held perception that IT/IS systems can 'add value' to business, there have been a number of well published IT/IS failures (for example, the London Ambulance Service, the London Stock Exchange's Project Taurus, the Federal Bureau of Investigation's Project Trilogy and Nike's Project Integrated Enterprise Software).
Discuss what may lead to the dramatic failure of strategic information systems planning efforts, and suggest what mechanisms should be part of any strategic information systems planning effort to minimise the risk of failure.