About BOM Quantity

Quantity is a calculated property that describes how much of a component is used in an assembly.

Three properties define quantity property:

• Item quantity
• Unit quantity
• Total quantity

You can override the calculated quantity value and enter a Static Quantity value. An override value is displayed in dark blue.

Item quantity (Item QTY) is the number of instances of a component. Item QTY is a read-only property.

Tip: This property is not included in the default BOM.

Unit quantity (Unit QTY) is the amount which each discrete instance of a component adds to the total quantity. Components quantified by the number of instances of the component have a Unit Quantity of Each. Some components are quantified based on some physical aspect of the component. These physical aspects, such as wires, grease, cut-length steel, and pipes, have a Unit Quantity derived from a parameter.

Unit quantity is composed of two properties: Base Quantity and Base Unit. Base Quantity is the parameter that is the raw value for Unit Quantity. By default the Base Quantity of a component is Each. Base Unit is the unit that Unit Quantity is expressed in.

Total Quantity (QTY) is the Unit QTY multiplied by the Item QTY.

Note: Total quantity is the QTY property that is reported in a standard Parts List.

Each instance of components that have a BOM structure of Normal, Inseparable, or Purchased adds 1 to its QTY row. Reference components and children of Reference, Inseparable, and Purchased parents are not added to the QTY.