Variables in Optimizer with real (decimal) values have a precision of 8 decimal places. However, calculation functions in Anaplan, such as SUM, return real values with precision of up to 15 significant figures.

Learn more about precision differences and large number calculations in Anaplan.

There are many ways a number can exceed the 8 decimal place limit, such as:

- importing or entering such a number into a cell in a module that the Optimizer uses.
- a mathematical operation increasing the number of decimal places. For example, if you multiply a number with 8 decimals by 0.1, the result is a number with 9 decimal places.

If any number that Optimizer gets from the model exceeds the 8 decimal point limit, the Optimizer internally truncates that number to compute a solution within the 8 decimal limit.

For example, *5.55555555555555* is truncated to *5.55555555*.

However, to evaluate the Boolean line item associated with a constraint, the model uses its original values. So, in some rare cases, one or more Boolean constraint line items might not display a true value even if the Optimizer has found a solution. For example, when a truncated decimal means that a value is marginally smaller, altering a value in the constraint formula.