TL;DR
The supply decision sets the cost the margin sits on, so it belongs inside the quote. Business Central's agent checks inventory and promises dates — across four pages it never compares who to buy from, at what cost, at what margin.
Does choosing the supplier belong to procurement, or to quoting?
To quoting, and the argument is one sentence: the supply decision sets the cost that the margin sits on. Make it after the quote has gone out and you have priced the job before you knew what it costs you.
That is not how most distributors work, and it is not usually a philosophical choice. It is a time problem. A single requested item may be available from several suppliers at different prices, different lead times and different stock positions, and comparing them properly means opening several browser tabs or several portals for one line of one quote.
So the decision does not get made badly. It mostly does not get made at all — the line goes to whoever it went to last time, and the margin is whatever it turns out to be.
For the owner who carries the margin number. 7 minute read.
The decision that gets skipped, and why nobody notices
Skipping it is invisible in a way that makes it durable.
Nothing goes wrong. The quote goes out, the order is won or lost on price, and the job earns whatever it earns. There is no error message for "we could have bought this from the other supplier, in stock, today, at a better cost." The counterfactual never appears on any report.
This is the difference between a system that answers faster and one that answers better. Speed is worth real money — chapter 1 is entirely about it — but speed alone leaves this decision exactly where it was, which is to say unmade.
Margin is set at the supply decision, not at the price decision
Worth separating two things that get conflated.
Pricing is what you charge the customer. It resolves through the customer record — price groups, contract prices, quantity breaks — and chapter 2 covers it. Business Central holds those rules and applies them well.
Sourcing is what the item costs you. And margin is the gap between them.
- What we charge — Where it is made today: The ERP's pricing engine, automatically · What it moves: Competitiveness
- What it costs us — Where it is made today: Often nowhere, on a quote · What it moves: The margin on the job
A system that handles the first and ignores the second has optimised the half that was already working. The unmade decision is the one worth surfacing, because it is pure upside — the same order, at the same price to the customer, sourced better.
What the comparison has to carry, on the line
For one requested item a distributor may hold many supply routes. The panel behind that line needs enough to decide in seconds, not enough to be thorough:
- Their price, because it is the cost the margin sits on.
- Lead time. The cheapest offer three weeks out is frequently the wrong one.
- What they have on the shelf, against the quantity actually requested. The same offer is a good answer for a small quantity and useless for a large one.
- Your margin at the price you are quoting, computed on the row. This is the field that turns a procurement comparison into a quoting decision.
- Their code for the item — the reference that actually goes on the purchase order.
- Labels, not rankings: cheapest, fastest, preferred. Facts, stated.
And one thing that matters more than it sounds: collapse the attributes that do not differ. Ten rows all carrying the same standard and the same finish is not a comparison — it is homework. Show what separates the options and put the rest above the list as the same across all of these.
Never recommend a best supplier
This is a firm position of ours, and it runs against the instinct to be helpful.
The cheapest offer is frequently the wrong one, and the reasons are not visible to the system: a three-week lead time on a job that ships Friday, a certification the customer's site requires, a supplier who has been unreliable twice this quarter, a relationship the owner is protecting for reasons that have nothing to do with this order.
A person holds all of that. The software holds none of it.
So label the facts, collapse what does not differ, and let the human choose. The system's job is to make a five-minute comparison into a five-second one — not to make the decision, and not to bury the alternatives behind a recommendation that is right most of the time and expensively wrong occasionally.
This is the same principle as chapter 8's: the machine locates where judgement is needed and presents the evidence. It does not replace the judgement.
Business Central answers when, and does not answer who
Microsoft's Sales Order Agent [GA] is thorough about supply — in one direction.
It checks availability, documented as the projected balance from ledger entries plus scheduled receipts minus gross requirements. And it goes further with capable-to-promise:
"CTP evaluates production capacity, procurement timelines, and supply chain constraints to determine when an item can realistically be delivered. This capability applies even when items aren't currently in stock and must be produced or procured based on lead times, not just inventory."
That is a real supply calculation, and more than a quote generator does. It answers when can we get this, including for items that have to be bought in.
*What it does not answer is from whom, and at what cost to us. Across the overview, the FAQ, the process page and the item-availability page — all four read in full — there is no comparison of supply sources on price, and no margin figure anywhere. The price the agent computes is explicitly a sell* price:
"the agent creates a temporary sales document behind the scenes and applies Business Central's standard pricing engine, including customer price groups, customer discount groups, and line discount rules."
The word vendor appears on those pages only as a field name — "vendor item number" in the matching layers, and Vendor Item Number as a searchable field on the item — and once as something the reviewer does: "creating the right customer, contact, or vendor" to unblock the agent. None of them is a comparison.
Cost never enters that surface, so margin cannot. That is a scope decision, not an oversight: the agent is built to capture an order accurately, and capturing an order accurately does not require knowing what the item costs you.
Answer faster, and answer better
The pitch a distributor should expect from any of this is not "we read your email". It is:
the same request, answered in less time, with the supply decision actually made — visible on the line, with the margin computed, and settled by a person who can see the alternatives.
One of those halves is worth having on its own. Together they are the difference between quoting faster and quoting better, and only one of them shows up in the margin at the end of the year.
About Cognilium Cognilium builds AI systems that work in tandem with Microsoft Dynamics 365 — the decisions the ERP records but does not make. Business Central and Finance & Operations, on your own governed stack. https://cognilium.ai · https://www.linkedin.com/company/37180269/
Want to see what your margin looks like when the supply decision is made on the line instead of after it? Book a 15-minute call and we will walk it with your own supplier data. No deck.
Sources
- Sales Order Agent overview — Business Central
- Item availability in Sales Order Agent (preview)
- Process sales quotes and orders with Sales Order Agent
- FAQ for Sales Order Agent — Business Central
Sources
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The workspace these articles describe — one queue, per-line confidence, supplier choice and the write-back — as a product for Business Central distributors.
