[dingaling]

> Why is it tied to time, instead of deliverables?

Once you make a deliverable the metric, work interaction and innovation suffers.

Say Bob finishes assigned Task-A in six hours. However Alice is struggling with her Task-B and could do with some of Bob's Java expertise. But in a deliverable-driven environment, Bob's done and clocks out. See ya Alice!

Or Alice is waiting for an informal reply from Trent, but Trent's reply is not a manager-assigned deliverable so he doesn't bother responding. He wants to press ahead and get Task-C finished so that he can clock out.

Instead of focusing on deliverables, most employers therefore focus on 'time dwelling' in the hope that people will interact and share the work burden.