[4258HzG]

I would guess 'management' would be the more likely target. In jobs like sales and administration, being able to rapidly switch focus to what just came up is advantageous. The people on the manufacturing floor or operations I have worked with have the same issues with being interrupted during their work, though it's often an engineer that's the culprit. (Managers can quantify 'blue colar' productivity losses easier.)

[adrianratnapala]

The in such situations, engineers often are the managers.

For example I asked an engineer uncle of mine what kind of salary to expect when moving back to Australia. He immediately started talking about middle-manager compensation.