Precision and Regular Constraints

Use caution in making this number much smaller, since the finite precision of computer arithmetic virtually ensures that the values calculated by 1-2-3 and the Solver will differ from the expected or "true" values by a small amount. On the other hand, setting the Precision to a much larger value would cause constraints to be satisfied too easily. If your constraints are not being satisfied because the values you are calculating are in units such as millions of dollars, consider checking the Use Automatic Scaling box instead of altering the Precision setting.