Capital Formboard Designer > Worst Case Bundle Sizes

Calculate Worst Case Bundle

Sizes

You can use this action to re-calculate and display a more representative bundle size in order to render more accurate formboard diagrams.

Worst

Case

When generating a full scale (length and width) diagram for a composite harness, the bundle width (the size of wires plus any insulation over the wires) rendered, is the one calculated on the composite harness; the actual real bundle width on any of the child harnesses, is likely to be smaller.

The worst case bundle size is calculated as the largest width of the bundle from the derivative or modular harnesses.

Calculation

Method

The following methods are used to work out the worst case bundle size:

If the design has derivatives — Bundle width is calculated based on wire distribution across all derivatives. The largest calculated size is used as the worst case. You do not need to have run composite breakdown as a prerequisite for running the calculation, but there must be a list of derivatives in order to understand the wire distribution across these derivatives.
If the design has exclusive functional module codes — Bundle width is calculated based on all possible functional module combinations. The largest calculated size is used as the worst case. The existence of child modules is not a prerequisite for running the calculation. However, the design must contain exclusive module codes so the action can work out different combinations of module codes, which can be regarded as buildable harnesses.

If no exclusive relationships appear between the codes, the biggest buildable harness will include all module codes. The calculated value will be the same as the original composite bundle width calculation (that is, without worst case being applied).

If the design has exclusive production module codes — Bundle width is calculated based on all possible production module combinations. The largest calculated size is used as the worst case. The same sub-bullets apply as for the functional module code method.

If more than one of the methods applies, the calculated widths from each are compared and the biggest value is used as the worst case.

If none of the methods apply, the standard Harness Engineering Calculate Node/Bundle Sizes calculation method is used, which considers all wires in the bundle.

All calculations use the Bundle Size Calculation Method set in project preferences.

Insulations

When you run the action, the Calculate Worst Case Bundle Sizes Dialog Box offers the option to re-calculate insulation totals (tape length for node/continuous insulation runs and tube size) for the composite, based on any revised bundle widths.

The action uses the default harness processing Calculate Insulation Totals method.

Selected tubes are re-selected based on any revised bundle widths.

Fixed tubes are not included in any re-selections.

Fixtures

When you run the action, the dialog box offers the option to update and re-select fixture part numbers based on any revised bundle widths.

Flexible

Execution Model (FEM)

You can use FEM to automatically run the action as a separate process and continue to work in the interactive session. See “Flexible Execution Model” in the Capital Design Tools - Common Functions User Guide for more information.

Output Window

The Output Window displays information about the action including details of any part numbers that have been re-selected where this was requested.

Parent Topic:

Worst Case Bundle Sizes