Lean Time Management

A current missconception (biased, at least) about the consumption of time is that estimation on the time "spent" is done by the output produced. In fact, as several other topics in Lean Management, VALUE, in capital letters is not about the total amount of products but  about global, timeless outcomes that we are capables to produce in the long term.
So time management shouldn't be to plan or control over the amount of time spent on specific activities to increase effectiveness, efficiency or productivity. Time isn't a resource for the process, time is a condition, a boundary and, because that, we must control it in a different way.

To sum up, when a process is being done, resources are expended during a period of time. The process lasts time, the point about time is done the actions in the right time to optimize the overall process.

To achieve that, activities have to be done in a especific order and last an optimum amount of time.

In the end, we can (and have to) arrange processes, but can't timeworking.

Thus, the lean time management principles derive from the fact that time is neither a input or a resource, time is a constraint and hence, we must be aware of the fact that we can't overcome the boundary of time.
Time has only one direction. It isn't reversible. We can modify other factors in order to archieve our goals but time can't be undone or altered.
As space.
Time and space can't be maximized in any way. We have not power on time (and only a limited so it refers to space) and hence is a misunderstanding talk about "time management".

let me think...