CEILR methodology

Evidence before confidence. Economics before spend. Continuity before scale.

CEILR is designed to make Amazon seller decisions more defensible by keeping the formulas, constraints, evidence state and seller action connected. This page explains the core operating method without hiding uncertainty behind a score.

The operating chain

Profit → cash → inventory → conversion → evidence.

A growth action should survive all five gates. Passing one does not override failure in another.

01

Profit

Does the unit economics support the action?

CEILR begins with contribution before advertising. Selling price is reduced by seller-entered landed cost, Amazon/per-order fees and other represented order-level costs. Advertising room is then derived from what contribution the seller chooses to protect.

02

Cash

Can the business actually fund it?

A profitable action can still consume cash the business needs for stock, commitments or reserves. CEILR therefore separates an economic ceiling from a cash-supported ceiling rather than calling both “profitable.”

03

Inventory

Can supply survive the demand plan?

Runway, lead time, safety stock, inbound units and reorder commitments belong beside growth decisions. Increasing demand into a likely stockout is not treated as durable growth.

04

Conversion

Does the click-to-order assumption support the economics?

Conversion rate turns allowable contribution per order into an allowable CPC. Because conversion can move, the ceiling should move with it instead of being treated as permanent.

05

Evidence

How current and complete is the support?

Provider observations, seller-entered economics and platform evidence can differ in freshness and certainty. CEILR's evidence model keeps fresh, stale, missing and conflicted states visible where supported rather than manufacturing certainty.

06

Seller action and measurement

The loop closes after the decision.

CEILR ranks a decision; the seller controls execution. Decision Memory then provides the structure for reconnecting later evidence to what was decided and whether the intended outcome actually occurred.

Transparent core formulas

The marketing calculators use simple seller-entered economics.

These formulas are deliberately visible. They are narrower than the authenticated CEILR workspace and do not pull Amazon data.

Measure
Formula
Interpretation
Pre-ad contribution
Selling price − landed cost − Amazon/per-order fees − other represented order costs
Economic room before advertising
Profit-Safe CPC
(Pre-ad contribution − protected contribution/order) × conversion rate
Modeled economic click ceiling
Cash-supported CPC
Available ad cash ÷ (planned daily clicks × planning days)
Modeled cash ceiling for the plan
Fundable CPC
Lower of Profit-Safe CPC and cash-supported CPC
The tighter modeled ceiling
Break-even/target ACoS ceiling
Allowable ad spend/order ÷ selling price
Advertising-spend ratio supported by entered economics
Simple reorder point
Average daily units × (lead-time days + safety-stock days)
Seller-entered lead-time + buffer threshold

These formulas only reflect the inputs represented. Taxes, refunds, returns, storage, promotions, overhead, financing, marketplace-specific fees and other costs can materially change real profitability if they are omitted.

Truth Layer and provenance

CEILR separates observed evidence from assumptions.

The product should become less certain when the data becomes weaker. That principle matters more than making every card look complete.

A

Seller-entered truth

Costs, cash, commitments and operating inputs.

Seller-entered values remain attributable to the seller rather than being silently replaced by a provider estimate.

B

Provider evidence

Observed or estimated marketplace signals.

Keyword, competitor, visibility and market evidence can come from supported providers. CEILR does not represent an estimate as Amazon ground truth and does not fabricate missing provider fields.

C

Freshness and conflict

Age and disagreement affect confidence.

A stale observation or conflict between sources should be surfaced as a decision constraint. CEILR's goal is defensible reasoning, not a falsely precise answer.

D

Read-only Amazon boundary

Analysis and execution stay separate.

CEILR's current Amazon integration is read-only. It does not write listings, prices, inventory, orders, bids, budgets, keywords, buyer messages or review requests. Seller-controlled execution preserves a clear approval boundary.

Use the methodology

Apply the same decision discipline across research, PPC and inventory.

PPC

Amazon PPC softwareProfit-Safe and Fundable CPC in the advertising workflow.

PROFIT

Amazon profit analyticsContribution, ACoS/TACoS context and Next-Dollar prioritisation.

INV

Amazon inventory planningRunway, reorder and growth-capacity constraints.

C
Deterministic core logicNo paid LLM in the runtime path

CEILR does not use invented outcomes to make its decision model look more certain than the evidence supports.

Test the formulas

Use your own numbers before trusting the ceiling.

Break-even ACoS calculatorReorder-point calculator