JustilityAssumption testing canvas
Prioritize uncertain assumptions and define experiments, thresholds, results and decision rules.
Turn an uncertain belief into a falsifiable experiment with an explicit threshold and decision rule.
Priority = importance × uncertainty. A high score identifies what to test first; it does not validate the assumption. This tool does not run experiments. Up to 50 rows; 4,000 characters per section, 1,200 per table cell.
Your work stays in this tab. Nothing is saved automatically. Save a readable, unencrypted project file before closing. Downloads remain wherever you save them.
Processed on your device. Your files are never uploaded by Justility.
How privacy worksHow it works
Open assumption testing canvas, enter your own project details or load the labeled example, then complete the prompts and review the worksheet. Review the results and download your project to continue later.
Supported formats
Editable JSON project up to 1 MB; plain-text report and CSV rows. Up to 50 rows, 4,000 characters per section and 1,200 per cell.
Good to know
Experiments are planned and recorded here; this tool does not run them.
Worked example
Before
Demand assumption: importance 5, uncertainty 4
After
Priority 20; test for 15 reservations within 14 days
Record observations and compare against a predeclared threshold before deciding.
Assumption testing canvas: interpret the result
Prioritize uncertain assumptions and define experiments, thresholds, results and decision rules. Experiments are planned and recorded here; this tool does not run them. All project files are readable and unencrypted. Save and open them explicitly; there is no automatic browser persistence.
Systems iceberg explorerTroubleshooting
Does a high assumption score validate the belief?
No. Importance multiplied by uncertainty prioritizes investigation. Validation depends on the quality and results of the experiment you define.
Common questions
Can I use assumption testing canvas offline?
Prepare this tool using Offline help while online. After preparation, it runs locally with fresh input. Browser cache eviction remains possible; keep project downloads separately.
Can I use this without an internet connection?
Yes, after you prepare this tool from Offline help and the browser retains its assets. Installation is optional. All processing dependencies are bundled locally.