Final answer:
Mintzberg found that the majority of executives' meetings and contacts are ad hoc, despite the use of technology for communication and travel. Technology does not necessarily reduce unexpected disturbances.
Step-by-step explanation:
Mintzberg found that the majority of executives' meetings and other contacts are ad hoc. While technology, such as email, text messaging, smartphones, tablets, and laptops, can help executives stay connected, it does not necessarily reduce unexpected disturbances. Executives still spend a significant amount of time traveling and have to deal with unplanned interruptions and meetings.