Associated programs:

Creating rules of measurement

Once the set of measurement rules has been created, the different rules of measurement must be included. To do this, click on the "Edit" button at the top of the screen.

Then, using the "Add" option in the "Rules of measurement" panel, enter a name for the new rule of measurement and click "Accept". This will then be divided into three panels:

  1. The left panel shows a column with the rules of measurement included in the set.
  2. On the right-hand side, a "Selection" panel appears at the top.
  3. The "Items" panel is displayed at the bottom.
When a rule of measurement is edited, it is locked to prevent another user from being able to modify it at the same time. To indicate this, a key symbol appears next to the name of the rule being edited to indicate this.

"Selection" panel

After clicking on "Add" in the "Selection" panel, a window opens where the various fields required for filtering the elements must be defined:

  • Logical operator
    This operator allows users to choose between the "AND" and "OR" operators, i.e. it sets necessary or alternative conditions for filtering elements during selection. If only one condition for selection is desired, the "AND" operator must be used.
  • Parameter
    The selection of elements must be carried out from some of the parameters that define them and that can be found in "BaseProperties" of the parameter table. The definition of the parameter also requires setting the entity by "Component" or "Parent Component"; the Type, by "Property", "Quantity", "Layer" or "Group"; and, from the blue arrow, the "Parameter" and the "Set" will be selected from the list.
  • Condition
    By assigning a condition, the filter criteria is established on the basis of the value taken by the previously defined parameter. Once the type of "Condition" has been established ("equals", "does not equal", "is greater than", "contains", etc.), the "Value" of the parameter must be chosen using the blue arrow on the right.

"Items" panel

After clicking on "Add" in the "Items" panel, the application displays a window in which the different fields necessary to associate an item and the quantities formula can be defined. The properties of an IFC entity (IfcPropertySet) can be used to carry out the measurement (variables B, C and D). The variable "A" would be per item.

Entering formulas or constants

  • Formula. To include a formula in the quantities, it must be written in the corresponding field, "Formula". This field may be associated with other parameters (B, C or D).
  • Constant. To add a constant to the quantities, select the "Constant" "Type" in the parameter (B, C or D), and enter the numerical value in the "Parameter" field. Once the constant has been entered, add the corresponding "Formula".
More information:
Detailed examples of how to create rules can be found in the "Step by Step" section of the Open BIM Quantities User Manual and in the videos of the Open BIM Quantities Quickstart Guide.