Does anyone have experience in measuring task success with a TPI score?
As an example I can give measuring task success on a travel website and example tasks would be:
- Search for a holiday destination I have in mind
- Filter by date availability
- View what's included in the deal.
If a maximum score for a task is 100, how do we establish how much to deduct from that depending on the types of struggles a user might have when competing it? Is there an universal formula for this?