Weight and Balance Management ─ Usage
How rollup is calculated for subassemblies
Your system administrator defines the maturity for different weight types. That is, which weight type is to be considered for the rollup calculation when multiple weight types are available. The administrator also defines the weight types for which the mass of the parent subassembly is to be considered for the rollup calculation and the masses of its child parts are to be ignored.
The rolled up mass for a subassembly is the sum of the masses of all its components. If the mass of a sub-assembly and the masses of its individual components are both available, then only one is counted. However, some business cases require that both the assembly mass and the sum of the components' masses be included in the rollup calculation. The administrator can set preferences to achieve the required behavior.
Example
Consider that the administrator has defined that the Actual and Asserted weight types as matured weight types.
And the administrator has defined the maturity for different weight types in the following order:
- Actual (maturity 1)
- Asserted (maturity 2)
- From Design (maturity 3)
- Estimated (maturity 4)
- Budgeted (maturity 5)
Based on the given preference values, the rollup for different scenarios is calculated as follows:
- If the From Design assembly mass has the highest maturity among the available masses, or if the From Design assembly mass is available and a lower precedence mass (Estimated or Budgeted) is available as well, then both the assembly mass and its component masses are included in the calculation. Component mass is selected based on the assigned precedence.
- If the From Design assembly mass is available but the other higher precedence masses (Actual or Asserted) are also available, then the higher precedence mass (between Actual or Asserted) is considered and the components mass values are ignored.
- If the available subassembly mass has a lower precedence (Estimated or Budgeted), then the rollup of the components is considered, and the mass of the parent subassembly is ignored.
- If the subassembly mass is not available, then the sum of the components is considered.
Source: https://docs.sw.siemens.com/en-US/doc/282219420/PL20251212545240207.xid2304663/xid1961961 · retrieved 2026-07-11