Planning and estimation discussions always come back to:
- Agreeing what will be done
- Agreeing how much it will cost
- Agreeing a deadline by which the what will be done
Because these questions require that one knows everything down to the deepest detail and that all possible happenings are known (which means knowing when people will be ill and for how long, how much time they’ll need to take off for dealing with family troubles, problems with the plumbing etc) and the risks are mitigated such that they absolutely will not affect your project in unpredictable fashions.
That’s not to say that one can’t set deadlines but one has to expect to trade features away, adjust resourcing etc. Of course none of this is news and yet so many places claim to be agile whilst continuing to have the what, how much, when discussion.
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