Sheet Metal Design & Manufacturing Engineering

Swaminathan Nagarajan Deputy Manager - Project Procurement

Good bridge from spreadsheet-era costing to how prod teams think today; the Module 2 step-down overhead allocation at the automotive plant stuck, especially the scrap-rate tweak. I've used that math in a PR for a new prod line, though I wasn't sold on the brief learning-curve coverage—wished there was more on capacity constraints.

aayush agarwal Engineer

The framing around testability in a costing context went further than I expected, tying assumptions to checks instead of vibes. It bridges legacy spreadsheet thinking with a more modern flow: cost models treated like code, with PRs, CI gates, and a notion of prod parity that made sense to me. The bit that stuck was the BOM Rollups and Yield Loss section, specifically the example where a 2% scrap tweak flipped margin after the variance waterfall at ~18:30; I’ve already mirrored that check in a repo. As someone bouncing between old ERP exports and newer infra, the arch conversations landed, even if the obs angle was mostly light. wasn't sold on how overhead allocation stopped short of multi-plant scenarios; I wished there was more there, especially for automotive suppliers. Still, I’m more comfortable making calls about cost architecture now, and defending them when finance asks why the numbers changed.

Issa Bilal

Clear pass on fundamentals; Chapter 3's BOM roll-up with scrap-rate math mirrors how prod books COGS, and the spreadsheet maps cleanly to a repo. It's mostly right-sized for beginner/intermediate, though I wasn't sold on the overhead allocation shortcut in Section 5 and wished there was more on variance tracking once RPS spikes.

Omkar Shinde Engineer

Good grounding for engineers touching manufacturing budgets; the Chapter 4 BOM roll‑up where scrap is 2% and labor is absorbed per hour stuck, especially seeing unit cost shift at different prod volumes. it's useful for early estimations, though I wasn't sold on the overhead allocation math and wished there was more on automotive tooling amortization.