ution which it can prove is within this percentage of the best possible solution.
</p></li>

<li><p>
Effect of parameter fixing
</p>

<p>
The optimisation involves making an estimate of some key parameters, solving a question assuming these estimates, and then looking at the result to see how good the estimate turned out to be. Here you can tell the optimisation that if this guessing is fairly close to the mark, it might as well stop
</p></li>

<li><p>
Maximum runtime
</p>

<p>
This setting says how long yo