<ul>
<li>
working on something that's not going to be used (in a while),
</li>
<li>
doing work that will need re-doing (once the customer sees the initial work, <a href="licationengineering.blogspot.com/2010/11/humphreys-requirements-uncertainty.html">he will change his mind</a>),
</li>
<li>
skewing your estimates: too much detail can inflate estimates beyond any realistic values.
</li>
</ul>
</div>
<div>
Of course, there are things that can help with this such as, ahum, having a clear vision, but you need to start somewhere.
</div>
<blockquote>
<div>
<strong>Try:</strong> Fixed sprint length (of two weeks)
</div>
</blockquote>
<p>
<strong></strong>
</p>
<ul>
</ul>
</div>