A value-chain tree asks which activity creates the cost or the differentiation, not “inbound, operations, outbound, marketing, service” as a recited list. You draw the client’s actual steps, park $ or time on each, and go to the fat node. Naming Porter’s chain out loud is optional and often a fail if you then tour every box.
This is where in the flow. Ops cost is rate vs utilization inside a node (GJ/t, uptime). Use chain first when you do not know which node; use ops when you are already in the kiln.
Draw their chain, not the textbook five
A cement producer is not a retailer. Do not force “marketing & sales” into equal time with the kiln.
Example chain (bulk cement):
quarry / raw mix → kiln (clinker) → mill (cement) → pack / bulk load → logistics to customer (and a parallel inbound chain: fuel and gypsum to the plant).
| Step | Role | Typical $ signal |
|---|---|---|
| Inbound fuel & raw | Feedstock + freight-in | $ / GJ delivered, not $ / t coal |
| Kiln | Energy + uptime | GJ / t, cold starts |
| Mill / pack | Quality, bags vs bulk | Packing labor, bag premium |
| Outbound | Delivered cost vs mill net | $ / t-km, backhaul |
| Commercial | Who you sell (bulk vs bag) | Mix, not “brand spend” |
If 70% of the problem sits in inbound + kiln energy, do not spend the case on the salesforce.
Worked example: the leak is inbound, not “operations”
Prompt. Same coastal plant family as the ops article? Different company: Caldera Cement, inland, 2.1 Mt cement. Delivered margin is thin. The CEO wants a “value-chain transformation” and a digital kiln twin. You get $ / tonne by step (cash cost):
| Step | $ / t cement | Notes |
|---|---|---|
| Quarry & raw | 7 | Own quarry, short haul |
| Inbound coal freight | 11 | 420 km rail + last-mile truck; coal $ is extra in kiln line |
| Kiln energy (coal FOB + power) | 24 | Heat rate OK vs peer |
| Mill & pack | 6 | |
| Outbound to customer | 13 | Average 110 km |
| SG&A | 5 | |
| Cash cost | 66 | Net price bulk $72 / t |
Contribution $6 / t. Peer inland plants: $9–12 / t. Gap $3–6 / t.
Where is the gap. Kiln energy $24 vs peer $23 — not the story. Outbound $13 vs peer $12 — meh. Inbound coal freight $11 vs peer $5 (they sit on a spur with a mine 80 km away). +$6 / t on inbound freight is the whole peer gap.
A digital twin on the kiln might save 0.1 GJ/t × $7/GJ ≈ $0.70 / t. Real, not the $6. The chain told you not to start in operations theater.
So-what options (only on the fat node). (1) Coal swap: source from a mine 140 km closer; worse FOB $ / t coal but $ / GJ delivered wins if freight −$4/t and heat rate holds. (2) Rail contract — volume commit vs $2/t. (3) Move to petcoke or RDF if the kiln can burn it — that is still inbound energy logistics / fuel choice, not a marketing chain. (4) Do not spend $8m on a twin this year.
$ at stake. 2.1 Mt × $4/t freight save (realistic chunk of the $6 gap) = $8.4m. Twin: 2.1 Mt × $0.70 = $1.5m if it works.
Recommendation. Kill the twin as the flagship. Run a delivered $ / GJ tender on fuel. Risk: closer coal has sulfur that kills heat rate and you give the $4 back in the kiln — so the ops identity and the chain talk to each other: chain picks the node; ops checks the rate. Next: three fuel FOBs + freight quotes on one page.
You used five steps. You did not tour HR, service, and procurement as equal chapters. Procurement of coal is the inbound node.
When the chain is the wrong tool
You already know energy GJ/t is the leak. Stay in ops cost. Redrawing quarry-to-bag is stalling.
Profit fell and it might be price or mix. Profitability bridge. Chain will not show a payer mix shift in a hospital (different industry; hospitals have a care-delivery chain if the case is throughput — still, isolate the P&L first).
Industry attractiveness. Porter — who captures surplus across firms, not which of our steps is fat.
Org chart. 7S.
The mistake unique to value-chain cases
Textbook boxes with no $. “Inbound logistics, operations, outbound…” as a speech. The unique fail is equal boxes. Caldera’s inbound coal freight was $11/t and the kiln digital story was CEO fashion. Second unique fail: calling everything ‘operations’ so the kiln twin and the 420 km coal haul sit in one bucket. Then you cannot choose.
How to open
“I will map Caldera’s cash cost per tonne from quarry through inbound fuel, kiln, mill, and outbound, and I will go to the step that explains the peer gap. If that is coal freight, I will not start with a kiln workstream.”
Then $11 vs $5 inbound. Then $8.4m vs $1.5m. That is the chain as a decision tool.
Put dollars on the steps, then cut
Structure drills: a chain with unequal boxes. If you tour every activity, you missed the fat node.