I'm designing a budget planning tool for sales reps. The reps must spread their budget across 5 different categories of spend, three of which have a minimum spend allocation. The organization would like to see reps spend more in the categories with minimum requirements.
My initial solution has been to implement a progress bar to each category to gamify the system. As the user allocates budget, the bar for that category fills up. The minimum marker is just beyond the half way point of the progress bar, leaving room to encourage additional spend. The issue is that I have an unknown maximum spend.
How do I create a progress bar with no maximum?