Plans are nothing without the ability to implement them. People are paramount. Ninety-eight percent of the people in a company are focused on running the daily sales, marketing, manufacturing, finance, IT, product delivery, and so forth--in other words "their day job." They neither have the time and often do not have inclination to drive the implementation of a new plan. New plans require bringing in temporary staff and sometimes new full-time skills to ensure the new goals are met in a timely manner.
Second to people, the right level of process is needed; however, too many organizations rely on process as the Holy Grail. Process needs to provide structure without bureaucracy. It must be agile enough to enable a team to quickly deliver critical capabilities yet adaptable to the inevitable adjustments as the business climates change.
Finally, and only after people and process, the focus turns to technology. It is only a tool to make the right people and processes more effective and efficient.
At eCameron, we live by the credo - people, process, and then technology all aligned to your strategy.