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- <sect1 id="sect-advanced-analysis-goalseek">
- <title>Goal Seek Tool</title>
-
- <para>Use Goal Seek Tool to search for a value of a single model
- variable that yields a given desired value of another single
- variable. For example, you can use the Goal Seek to find the
- break-even value for sales (the break-even is the amount of sales
- whose marginal revenue just covers the fixed costs and the profit is
- thus zero).</para>
-
- <sect2>
- <title>Using the Tool</title>
-
- <para>First, select the ``Goal Seek...'' tool item from ``Tools''
- menu. Specify the output variable cell (``Set Cell'') by typing
- the cell reference into the entry or by clicking the worksheet
- cell. If you are searching for the break-even point, for example,
- you should specify the cell reference of the profit calculation
- here.</para>
-
- <para>Specify the desired result for the output variable cell into
- the ``To Value'' cell. In the search for the break-even, specify
- this to be zero.</para>
-
- <para>Specify the input variable cell (``By changing cell'') by
- typing the cell reference into the entry or by clicking the
- worksheet cell. In the search for the break-even, specify the
- cell reference of the sales here. When you have done this, you
- may want to press the ``Apply'' button to start the tool.</para>
-
- </sect2>
-
- <sect2>
- <title>Results</title>
-
- <para>Gnumeric will systematically iterate the model by changing
- the input value to achieve the desired result, if possible. If
- goal seek was successful the tool displays the message ``Goal
- Seeking with cell __ found a solution''.</para>
-
- <para>It is possible that Gnumeric does not find a solution that
- generates the desired result. There may not be such a solution
- for the model, or, it may be too difficult to find. For example,
- the mathematical function behind the calculation may have many
- non-continuous points.</para>
-
- </sect2>
-
- <sect2>
- <title>Desired Value in a Given Range</title>
-
- <para>If Gnumeric did not find a solution that generates the
- desired result, you may want to try to specify a range (minimum
- and maximum) in which the value of the output variable should be.
- To do this, specify the ``Minimum'' and ``Maximum''
- entries.</para>
-
- </sect2>
-
- </sect1>