Formulas in Production Resources/Tools

Formulas in Production Resources/Tools

Definition

Use formulas to calculate the quantity and usage value of a PRT.

Use

You can define your own formulas for PRTs in Customizing for the Project System.

To use a formula, you must have previously defined the formula parameters that used in the formula.

Structure
Formula Parameters

You use formula keys to refer to the formulas that you want to use. Formulas contain parameters. These parameters are identified by a parameter ID. The parameter ID defines,

Which key word is assigned to the parameter
The dimension of the parameter
The name with which the parameter is referred to in a formula.

Parameters have various origins.

You can assign a parameter a standard value via the standard value key in the work center.

You can only use the standard value for work in networks and standard networks.

Formula constants in the work center: You assign the parameter a fixed value in the work center.

General operation value: The formula parameter is linked to a data field in the general activity data Typical fields are:

- Base quantity

- Number of employees

User fields: The value of a user-defined field in the activity is assigned to the formula parameter.

Value from production resource/tool (PRT) assignment: You assign a data field in the production resource/tool assignment to the formula parameter. The value of this field is used in the formula.

Production resource/tool constants: You assign constant values to the formula parameters in the PRT master record (PRT (misc.)).

Formula Constants in Production Resources/Tools

You can assign a constant value to a parameter when editing PRT master data (misc.). Choose Extras ® Formula constants. The Change Formula Constants dialog box appears. Here you enter up to six parameters, for which you enter a value and an unit.