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U sing Iteration
Circular references unresolved
During iteration, Multiplan calculates the cells down the columns instead
of across the rows, as in normal calculations:
Circular references can also be accidental. When the iteration field is No,
an error message appears after the normal calculation is complete:
If you do not want to use circular references, check the logic of your
formulas. You may have to rearrange the spreadsheet or redesign the
formulas to break the circle.
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When you choose yes at the iteration field in the Options command,
Multiplan calculates the spreadsheet over and over until some condition is
satisfied. Multiplan uses the results of the previous calculation for each
new calculation.
Circular references, cells that contain formulas that refer to one or more
uncalculated cells, are often used in target-seeking analysis, solving
simultaneous equations, and performing numerical analysis and other
complex tasks. Multiplan does not calculate these formulas using normal
calculation. Instead, to build formulas that depend on each other for
answers, use itera tion.
Multiplan first calculates in the normal manner, then checks the iteration
field for a Yes response. Multiplan then evaluates the completion test at
field (the default is DELTA ( )
<
0.00 I). If the completion test is FALSE,
Multiplan increments the iteration count by one, then begins the first
iteration. Iterations continue until the completion test is TRUE.
Values become more precise with each iteration. This is referred to as
"convergence." As the model converges, values change less and less
between iterations. The default completion ensures that the results are
precise to I/ IOth of a percent.
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