> ## Content Index
> Fetch the complete content index at: https://abundance.alloconomy.com/llms.txt
> Use this file to discover other available public pages before exploring further.

# The Purchase Order Begins Before the Purchase Order
- URL: https://abundance.alloconomy.com/alloconomy/commerce-before-the-purchase-order/
- Published: 2026-10-19T07:33:48.000Z
- Updated: 2026-10-22T22:20:17.000Z
- Description: Need, supplier identity, sourcing, approval and changing commitments.
- Author: Sathya Narayanan
- Tags: Alloconomy, Supply Chain, Commerce, Behind the Buy Button, #series-detail, #Import 2026-10-18 23:22

Supply Chain · Sixteen essays

Behind the Buy Button

Complete reading path · You are in Part 3 of 16
1. Part 1 [I Bought a Book. What Had to Be Promised First?](https://abundance.alloconomy.com/alloconomy/behind-the-buy-button/) The cast, the cheat sheet, and the whole commercial system.
2. Part 2 [Maya Sells to eComm Inc. Maya Also Sells Through eComm Inc.](https://abundance.alloconomy.com/alloconomy/commerce-who-is-selling-to-whom/) Retail vendors, marketplace sellers, custody and direct fulfillment.
3. Part 3 **The Purchase Order Begins Before the Purchase Order**Current essay Need, supplier identity, sourcing, approval and changing commitments.
4. Part 4 [Sent, Received, Accepted: Three Different Claims](https://abundance.alloconomy.com/alloconomy/commerce-sent-received-accepted/) Order lines, shipment assertions, receipt evidence and message status.
5. Part 5 [The $140 Disagreement Inside One Invoice](https://abundance.alloconomy.com/alloconomy/commerce-the-140-dollar-disagreement/) Two-, three- and four-way matching, disputes and settlement.
6. Part 6 [The Price After the Price](https://abundance.alloconomy.com/alloconomy/commerce-the-price-after-the-price/) Rebates, credits, working capital and realized supplier economics.
7. Part 7 [How Do You Receive an Hour of Work?](https://abundance.alloconomy.com/alloconomy/commerce-how-do-you-receive-an-hour/) Labor, maintenance and professional services need their own evidence.
8. Part 8 [Software Is a Promise Over Time](https://abundance.alloconomy.com/alloconomy/commerce-software-is-a-promise-over-time/) Access, usage, licenses, digital rights and renewal decisions.
9. Part 9 [A Printing Machine Is Not Yet Printing Capacity](https://abundance.alloconomy.com/alloconomy/commerce-a-machine-is-not-yet-capacity/) Manufacturing plans, advances, assets and readiness for use.
10. Part 10 [When the Project Changes, What Exactly Changed?](https://abundance.alloconomy.com/alloconomy/commerce-when-the-project-changes/) Scope, RFIs, approved changes, progress claims and retention.
11. Part 11 [Buying Power, Renting Space, Committing Time](https://abundance.alloconomy.com/alloconomy/commerce-power-space-and-time/) Electricity, financial energy settlements and leases.
12. Part 12 [Now eComm Inc Is the Seller](https://abundance.alloconomy.com/alloconomy/commerce-the-platform-becomes-the-seller/) Business purchasing, cloud billing and marketplace collection.
13. Part 13 [One Transaction, Several Accounting Clocks](https://abundance.alloconomy.com/alloconomy/commerce-one-transaction-several-clocks/) Commitments, accruals, cash, assets and financial-statement scale.
14. Part 14 [A System That Can Remember Why](https://abundance.alloconomy.com/alloconomy/commerce-a-system-that-remembers/) Linking documents, quantities, time, corrections and independent evidence.
15. Part 15 [Safety Before Speed: What a Green Tick Cannot Approve](https://abundance.alloconomy.com/alloconomy/commerce-safety-before-speed/) Payment authority, supplier changes, duplicates, incentives and AI limits.
16. Part 16 [Follow the Promises Back to My Book](https://abundance.alloconomy.com/alloconomy/commerce-follow-the-promises-home/) A worked capstone and the bridge to the inbound and outbound series.

**Illustrative examples. Public sources. Personal views.**

I am Sathya Narayanan, writing in a personal capacity as I learn in public. The views, interpretations and teaching models are my own; they do not represent my employer or any other organization and carry no employer approval or endorsement. No confidential, proprietary or nonpublic employer information is used. Factual background comes only from publicly available sources. Maya of Stories Inc, the book vendor; Mayan of Sapiens Inc, the printing-machine supplier; and eComm Inc, the ecommerce company, are fictional teaching characters and companies. I appear as the customer in imagined scenes, not as a report of my actual purchases. These scenes do not describe any real company or its internal systems. The cases are separate teaching examples, not one continuous ledger. Scenario amounts, rates, terms and policies are illustrative assumptions unless expressly identified as dated public facts. Actual contracts, regulations, operations and economics require case-by-case analysis.

**Visual guide: the steps and the records they create**

[Open the buying and selling graph and quick definitions →](https://abundance.alloconomy.com/alloconomy/behind-the-buy-button/#buyer-seller-construct-map) See the industry names for PO, sales order, ASN, receipt, invoice and payment, with the steps that create or update each record.

Companion maps: [Inbound receiving](https://abundance.alloconomy.com/alloconomy/before-the-shelf/#buyer-seller-construct-map) · [Customer fulfillment](https://abundance.alloconomy.com/alloconomy/from-click-to-doorstep/#customer-fulfillment-construct-map)

*Part 3 of 16 · Behind the Buy Button*

## Maya receives a forecast, then an order

eComm Inc tells Maya that demand for *Making Things Work* may reach 1,000 copies. She starts thinking about paper and production time. A week later, she receives a purchase order for 100 copies. Has eComm Inc committed to buying 1,000, 100, or neither?

We cannot answer from the word “forecast” alone. In this example, the forecast is planning information and the accepted order is the particular commitment. A real agreement might make a forecast binding in specified circumstances. We must read it before choosing which meaning applies.

[![Part 3: sourcing & authority. 100 books × $20 per book = $2,000 order value Fictional teaching model.](https://storage.ghost.io/c/f5/a9/f5a9f801-5a10-44d6-b07c-6658660be1a9/content/images/behind-the-buy-button/figures/part-03.png)](https://storage.ghost.io/c/f5/a9/f5a9f801-5a10-44d6-b07c-6658660be1a9/content/images/behind-the-buy-button/figures/part-03.png?ref=abundance.alloconomy.com)

What changed from intention to authority? NEED — Forecast / request — An estimate or internal request; AUTHORITY — Approved scope — Who may commit, and to what?; COMMITMENT — Order + response — Effective terms and later amendments. Order value is not proof of delivery, expense or payment. Fictional example; see the nearby table and prose for an accessible explanation.  
[View the full-size diagram →](https://storage.ghost.io/c/f5/a9/f5a9f801-5a10-44d6-b07c-6658660be1a9/content/images/behind-the-buy-button/figures/part-03.png?ref=abundance.alloconomy.com)

## The before-the-order cheat sheet

| Item                        | Plain-language purpose                            | Common misunderstanding                 |
| --------------------------- | ------------------------------------------------- | --------------------------------------- |
| Forecast                    | Estimate likely need                              | Guaranteed demand                       |
| Requisition                 | Ask internally for a purchase                     | Order already sent to a supplier        |
| RFQ: request for quotation  | Ask for price and terms for a defined requirement | Accepted offer                          |
| RFP: request for proposal   | Ask suppliers how they would meet a broader need  | Permission to start work                |
| Approval                    | Grant specified authority                         | Approval for every later change         |
| Agreement or purchase order | State the applicable external terms               | Proof of delivery                       |
| Acknowledgement             | Record Maya's response                            | An unqualified acceptance of every line |

These are explanatory categories, not a claim that every purchase must pass through every document. Ordering ordinary supplies from an approved catalog can be simpler than procuring a printing system. A long-term lease can establish obligations without behaving like a merchandise order.

## Identify Maya before buying from Maya

The team needs more than a familiar contact name. Which legal entity is supplying the books? Which address receives notices? Who can agree a price change? Which entity receives payment? Is the machine contract with the same entity as the book contract?

In our fictional model, Maya’s Stories Inc. supplies books and Mayan’s Sapiens Inc. supplies printing machines. They are distinct suppliers, so the supplier identities, book agreements and machine agreements must remain separate. eComm Inc's retail business and eComm Inc's operations team identify the buying roles; their precise legal entity identifiers belong on the records.

Supplier qualification asks whether the business can meet the requirement. Supplier onboarding records the approved relationship. A later change to bank instructions is a separate authority event, not an ordinary edit to a mailing address. We will return to that distinction in the safety essay.

## Approval has a scope and a version

Suppose eComm Inc authorizes 100 books at $20 each, for a $2,000 order. Maya can deliver 80 on the requested date and 20 later. A useful acknowledgement preserves those two commitments. “Accepted” at the order header hides the different dates.

If the price later becomes $21, the team needs to know who agreed, which quantities the revision covers, and when the revised terms became effective. The latest total cannot explain an earlier invoice if the earlier agreement has disappeared.

Amazon's public [order-acknowledgement tutorial](https://developer-docs.amazon/sp-api/docs/submit-order-acknowledgement?ref=abundance.alloconomy.com) supplies a narrow, concrete example: omitted lines are treated as rejected, and acknowledged and invoiced cost prices must align under the documented rules. It also has book-specific price fields. That is evidence about that interface, not a universal contract rule for our fictional publisher.

## A capital approval answers another question

Ordering a $100,000 machine may require a business case as well as a supplier order. In our model, the business case explains why the capacity is needed and who authorized the capital. The machine supplier order describes what Mayan’s Sapiens Inc. must supply.

An internal approval does not prove Mayan accepted the machine order. Conversely, a signed supplier commitment does not prove that every internal approval was properly obtained. That can leave a real obligation alongside an internal control failure; pretending the obligation vanished would not repair the failure.

I am not assigning eComm Inc a legal conclusion here. I am preserving the questions so the responsible people can assess the actual facts.

## What this changes for the participants

Maya can ask for a clear commitment before making irreversible production decisions. eComm Inc's buyer can distinguish a desirable purchase from an authorized one. The business owner can compare the expected benefit with the full cost and the alternatives, including using existing capacity.

As the customer waiting for the book, I benefit when those promises are realistic. An attractive delivery date is only useful if the parties behind it understand what they have agreed to do.

The record I would want is a small, readable chain: the need, the approved scope, the supplier's commitment, and each authorized change. That chain gives the later shipment and invoice something definite to be compared against.

## Continue the series

Previous: [Maya Sells to eComm Inc. Maya Also Sells Through eComm Inc.](https://abundance.alloconomy.com/alloconomy/commerce-who-is-selling-to-whom/). Next: [Sent, Received, Accepted: Three Different Claims](https://abundance.alloconomy.com/alloconomy/commerce-sent-received-accepted/). Return to [the introduction and cheat sheet](https://abundance.alloconomy.com/alloconomy/behind-the-buy-button/).

*Evidence and method: public references were checked on October 18, 2026\. The fictional scenarios, proposed controls and design conclusions are learning models, not claims about a real employer. Reported financial figures retain their stated measurement dates.*