Where does the business really make its money?
Analyse customer and product concentration, ABC classes, revenue, quantity and margin.
Business intelligence, made practical · Lessons in 15 minutes or less
Learn to see your business differently.
Your business has a story to tell. Learn how to question performance, identify important relationships and recognise what deserves investigation. Then apply what you learn to your own data.
No account needed to learn. Each expanded lesson takes around 15 minutes, with optional exercises to explore further. The optional Free Diagnostic runs in your browser; your source CSV stays on your device.
The way to better decisions
The best business questions start before the dashboard.
Learn to challenge an assumption in minutes. Examine a realistic example, then use the evidence in your own business to decide what deserves a closer look.
What will you learn?
Start with a question. Discover a new way of thinking.
What changes when relationships are considered?
See Product × Customer mix, category position, location and period context.
Where does one relationship matter disproportionately?
Identify products or customers relying heavily on a single counterpart.
Where is activity disproportionate to value?
Compare Order Share with Revenue Share where Order ID is available.
Learn → Explore → Analyse
One useful lesson can change your next decision.
No compulsory course or account. Start with a short lesson, see a worked example, then investigate your own data when you are ready.
LearnChoose a practical 15-minute lesson about a question that matters to your business.
ExploreUse simple business examples to understand what the evidence means.
AnalyseUse the free diagnostic on your own data; go deeper with Professional when needed.
Keep learning
Short lessons first. Deeper guides when you need them.
Explore the 12-lesson library or investigate a specific business question in more depth with our existing guides.
ABC analysisWhat A, B and C classes tell you — and what they miss.
SKU rationalisationReview the product tail without cutting important relationships.
Customer concentrationMeasure revenue exposure and distinguish it from dependency.
Product profitabilityCompare commercial size with margin contribution.
Customer profitabilitySee where revenue and margin tell different stories.
Cost of complexityFind where ordering activity is disproportionate to revenue.
Bring your learning to life
Your data. Better questions.
Try what you have learned on your own business. No account required to start; your source data stays in your browser.
Already started a diagnostic on this device?
Resume previous diagnostic →
Free Diagnostic
Analyse your customers and products.
Start with ordinary transaction data. eightytwentyplus will validate the source, reconcile the numbers and show where concentration, relationships, dependency and complexity deserve attention.
What you need
Start with a normal Product × Customer transaction export. You do not need to prepare an analyst-ready model.
MinimumAt least one identifier — Product ID or Customer ID · At least one measure — Revenue or Quantity
Additional fields unlock deeper analysisProduct Description · Customer Name · Product Type · Product Category · Product Group · Order ID · Date · Total Cost · Location · UOM
Your data stays on this device
The local diagnostic analyses the source in your browser. Your working source, mapping and current diagnostic are retained in this browser so a page reload does not lose your work. eightytwentyplus does not upload your source file to a server.
Step 1 · Upload
Start a New Diagnostic
Choose the source file first. We will summarise it before asking you to confirm any mapping.
Step 2 · Mapping
Tell eightytwentyplus what each column means
Confirm the proposed mapping. Unused source columns can remain as Ignore.
Map at least one identifier and one measure to continue.
Step 3 · Setup
Set the report context
These choices describe the diagnostic. They do not change the source values or analytical rules.