BOM Costing for Automotive Seating — engineered to the last weld.
CostX calculates material, process, assembly, and overhead costs for every seat variant your plant produces — Driver, Co-Driver, Rear LHS/RHS, 3rd Row — with role-based access for Costing, Design, Manufacturing, Purchase, and Management teams.
- Frame / Wire38%
- Foam18%
- Fabric / Leather22%
- Mechanisms14%
- Assembly + OH8%
See CostX in action
CostX Overview
CostX Deep Dive
Why seating costing breaks down — and costs you contracts.
Scattered Excel sheets
Design, costing, manufacturing, and purchase teams all work in separate spreadsheets. One version gets emailed, another gets updated locally. By the time a quote is submitted, nobody knows which BOM is current.
Manual material cost calculations
Wire bending allowances, tube wall weights, stamping blank utilization, spring wire lengths — every engineer calculates these differently. A single wrong formula silently inflates or deflates your cost by thousands.
No approval trail for released costs
When a design change happens after costing is complete, there is no automatic flag to the costing engineer. Costs go stale, margins erode, and nobody is accountable when the program launches over budget.
No variant cost visibility
A seat program has Driver, Co-Driver, Rear LHS, Rear RHS, and 3rd Row variants — each with different quantities per vehicle. Most tools can't handle per-variant BOM quantities, so costing is done for one seat and multiplied — incorrectly.
Assembly cost is invisible
Weld operations, rivet counts, cycle times, and joining costs sit in the Manufacturing Engineer's head or on a separate process sheet. They never make it into the BOM cost roll-up accurately.
Approval is a black box
Submitting a costing version to the manager means emailing a file. There is no version history, no approval status, no rejection comment trail, and no way to compare what changed between Rev-A and Rev-B.
One platform. Five roles. Zero version confusion.
- 01Step
Design Engineer imports BOM
The Design Engineer downloads the standard Excel BOM template, fills in part numbers, drawing numbers, levels (0–9 hierarchy), geometry (diameter, thickness, length, bends, holes), variant quantities per seat, and material grades. No cost data — just engineering structure. Import into CostX in one click.
- 02Step
Costing Engineer assigns material costs
CostX auto-detects material type from the Part/Assembly column — Wire, Round Tube, Square Tube, Stamping, Bush, Foam, Fabric, Spring, Plastic. Material cost is auto-calculated from geometry using the live Materials Database (density × rate × volume). Costing Engineer sets overhead %, scrap %, and labor cost per part.
- 03Step
Manufacturing Engineer enters assembly cost
For every welded or riveted assembly, the Mfg. Engineer enters weld type (MIG, TIG, Spot, Arc, Laser, Resistance, Projection), quantity, cost per weld, and cycle time. Same for rivets (Pop, Solid, Blind, Semi-Tubular). Submitted assembly cost flows into the BOM roll-up instantly.
- 04Step
Purchase Engineer submits bought-out costs
Mechanism parts (recliners, tracks, height adjusters) are routed automatically to the Purchase tab. Purchase Engineer enters the sourced cost and submits — it appears in the costing roll-up without exposing the full BOM cost structure.
- 05Step
Costing Manager approves & releases
Costing Engineer submits a named version (V1, Rev-A, ECN-005) with notes. Costing Manager reviews the full BOM cost, per-variant totals, and pending items — then Approves (releases as a locked version) or Rejects with comments. Every version is stored as a snapshot with its own materials and rates.
- 06Step
Compare versions & export
Select any two released versions side by side — field-by-field diff shows exactly what changed in cost, quantity, material type, or geometry. Export the costed BOM to Excel for program submission.
Every material type. Zero manual formulas.
CostX ships with nine built-in cost engines. Select the material type, enter the dimensions from your drawing, and the cost is calculated live — bend allowance, wall volume, blank utilization, spring wire length. The Materials Database is editable — add new grades, update rates, and every BOM referencing that grade recalculates instantly.
DBMaterials Database is fully editable. Add new wire grades (SWM-B, HT wire, SS wire), tube grades (STKM17A, STKM11A), stamping grades (SAPH640, CR1D, SPFC), and fasteners. Set density and rate per grade. Changes retroactively update every live BOM that references that grade — released versions are unaffected (they store their own snapshot).
Every team member sees exactly what they need. Nothing more.
Costing Engineer
Full BOM access · Material cost calculators · Labor & overhead inputs · Manufacturing DB · Submit versions for approval · Design change notifications · Cost review & mark-reviewed · Excel export
Full AccessDesign Engineer
BOM structure only · Part numbers, descriptions, drawing numbers · Part images · Variant quantities · Geometry dimensions · No cost data visible · Changes automatically flag cost review for Costing Engineer
Structure OnlyManufacturing Engineer
Assembly cost inputs only · Weld operations (type, qty, ₹/weld, min/weld) · Rivet operations · Cycle time submission · BOM read-only outside the Assembly Cost tab
Assembly CostCosting Manager
Approval queue · Review pending submissions · Approve (release locked version) or Reject with comments · Full BOM & cost view · Version history & comparison
Approve & ReleasePurchase Engineer
Mechanism parts cost submission · Bought-out parts (recliners, tracks, mechanisms) routed automatically · Submit sourced cost · Full BOM visibility · No rate editing
Purchase CostOne BOM. Five seat positions. Per-variant cost at a glance.
A single vehicle program can have up to five seating variants — each with different quantities per part, different assemblies, and different cost targets. CostX tracks quantities per part per variant. Parts with zero quantity in a variant are excluded from that variant's cost roll-up automatically. The BOM editor shows all five variant quantities per row simultaneously, with totals live per variant.
- ✓Per-part quantity per variant
- ✓Per-variant BOM total cost
- ✓Filter BOM to show parts used in specific variant
- ✓Export costed BOM per variant to Excel
- ✓Submit for approval with all variant totals shown
- ✓Version comparison shows delta per variant
Submit. Review. Release. Every version locked for audit.
Submit Version
Costing Engineer names the version (V1, Rev-A, ECN-005), adds notes to manager, reviews pending cost review flags, and submits. The entire BOM, Materials Database, and Manufacturing Database are snapshot-frozen at the moment of submission.
Manager Reviews
Costing Manager sees the full per-variant cost breakdown, the BOM, open items, and the submission note. Manager adds a review comment — mandatory — and either Approves or Rejects. Cannot approve own submissions.
Released & Locked
Approved versions are stored as immutable snapshots. Change the live BOM, rates, or materials all you want — released versions are unaffected. Compare any two released versions field by field. Full audit trail: who submitted, who approved, when.
Rejected versions return to Costing Engineer with the manager's comment. Re-cost, fix, resubmit — the audit trail records every iteration.
When a Design Engineer edits a quantity, material type, or geometry dimension, CostX automatically flags the part for cost review and sends a notification to the Costing Engineer. The flag is visible in the BOM table, in the submission modal, and in the approval view. One-click mark-as-reviewed with timestamp and reviewer name.
Process costs are configurable — not hardcoded.
CostX ships with a Manufacturing Database that drives all per-operation costs across the BOM. Every rate is editable by the Costing Engineer. Changes apply retroactively to the active BOM; released versions keep their own snapshot.
The sum of all % entries (overheads + markups + transport) auto-calculates as the Default Overhead % applied to every new BOM part. Override per-part as needed.
Your Design Engineer never touches the costing tool. By design.
CostX generates a standard 48-column Excel BOM template that exactly mirrors the format your design team already uses (compatible with BOM_tables_and_calc.xlsx golden source format). Design Engineers fill in part structure, drawing numbers, geometry, and variant quantities in Excel — no cost data. Costing Engineer imports the file. CostX auto-maps material types, parses the Level 0–9 hierarchy, and warns about missing material grades.
- →Download standard .xlsx BOM template with sample data
- →Level 0–9 hierarchy columns (same as golden source Excel)
- →5 variant quantity columns (DRV/COD/RLH/RRH/3RD)
- →Geometry columns: diameter, thickness, length, width, bends, cuts, holes, material grade
- →Auto-detect material type from Part/Assembly column (Wire, Tube, Stamping, Foam, etc.)
- →Import warnings for missing material grades (actionable, specific)
- →Replace or Append mode on import
- →Preview all parsed parts before committing
Teams using CostX close quotes faster and win more programs.
"We used to spend 2–3 days on a cost roll-up before a program review. With CostX, the Costing Engineer submits in 4 hours and the manager approves the same day. The variant breakdown alone saved us from a ₹800/seat mistake on a Rear LHS vs Driver config."
"The weld and rivet module changed how we collaborate with the shop floor. Before, assembly cost was a gut feel number the costing team added at the end. Now our MFG Engineers fill it in directly and it flows into the BOM total automatically."
"What I love most is the version comparison. When the OEM comes back and asks why the seat cost went from ₹4,200 to ₹4,850 between Rev-A and Rev-C, I can show them the exact field-by-field breakdown — material grade change, 2 extra bends, scrap rate updated. No more 'I think it was this.'"
See CostX with your own BOM.
A 30-minute walkthrough tailored for seating engineers. Bring one BOM — leave with a working cost model.
- Live walkthrough on your own seat program
- Variant costing (DRV / COD / RLH / RRH / 3RD)
- Manufacturing rate setup for your plant
- Excel import demo with your 48-column format
Start costing your seat program today.
Join seating engineers across India, Southeast Asia, and Europe who use CostX to deliver accurate BOM costs faster.