Inputs
Stage counts for one consistent period, gross profit per sale, acquisition spend and a realistic relative improvement target.
APIS LAB / Tool
Funnel diagnostic
Instead of trying to improve everything at once, calculate which transition is most valuable to test first and why.
How to read the result
Workspace
Enter the inputs and the model will show both the result and its reliability
The result will appear here.
Check the units, periods and definitions before running the calculation. Weak input data produces weak conclusions.
Method
A tool is useful only when you can see what the conclusion rests on
The interface is only the front layer. The real value is the ability to inspect the inputs, understand how the output is calculated, recognise what the model cannot know and translate the result into a management action.
Calculation method
The model derives the conversion rate for each transition and calculates the downstream sales and gross-profit lift if only that transition improves.
Limitations
The result identifies economic leverage, not the root cause. It assumes the stage counts describe the same cohort and does not model capacity constraints or changes in lead quality.
Management output
A ranked list of transitions that should be investigated first, with a clear economic reason for the priority.
APIS LAB principle
A result is complete not when a chart appears, but when it becomes clear which decision follows, which assumptions remain disputed and what next evidence could change the conclusion.
Method