Applying equations

This table provides the parameter types for a lab that enables equations.

Equation Indicator Parameter Type for the Lab
Total Value Equation
  • Equation Total - Fires only at the formula level. The parameter is not visible at the item level.
  • Rollup, Cost, and Informational - not applicable. Always add the Total Value Equation parameters to the lab as Equation Total.
Calculated Parameter
  • Rollup - Fires at the item level. The equation is ignored and the parameter rolls up according to the rollup rules at the formula level.
  • Informational - Fires at both the item and formula levels.
  • Cost and Equation Total - Not applicable.
Rollup Param Total Test
  • Rollup - Fires at the formula level, not the item level, but does not assign a parameter value. (In other words, if you assign a value to Context.ReturnValue, it has no effect.) The Equation Indicator is typically used for an equation that tests or acts upon the rolled up value in some way. The parameter behaves like an ordinary rollup that has no equation.
  • Cost, Informational, or Total Value Equation - not applicable. Always add the Rollup Param Total Test parameters to the lab as Rollup.

For Parameters added to a Lab as Cost: When these parameters have an equation attached, the equation is ignored.