Job descriptions are intentionally broad-based to allow for flexibility. Within limits, people are expected to substitute for one another. The organizational structure is bureaucratic and fragmented into many departments. The structures are more fluid and of shorter duration. Changes in design are aimed at enhancing flexibility and responsiveness.
Greater influence is accorded people who demonstrate ability to add value.
You can imagine how the working atmospheres differ. In the Mechanically managed and structured organization people in one department know little of the missions and contributions of the others. Since work is highly specialized and interdepartmental communication leaves much to be desired, things that need to be coordinated slip through the cracks. Problems as well as opportunities go unnoticed. Blame is placed on others.