Can a progress bar go backwards?
A progress bar is meant to be progressing and it can revert back only if it is a continous event as in case of performing roll back of the same event in continuity. If it is a discontinous event happening over an interval then the regressive bar will not be the right pattern.
Why are progress bars inaccurate?
Well, it's because progress bars work by measuring the number of individual tasks needed to complete an operation, and then comparing how many are done to how many are left. This results in an uneven progress bar because some tasks take longer than others.
Are Progress Bars important?
Progress bars have a single purpose – to inform the respondent on approximately how much more time it might take to finish the survey. This single most important element can greatly add to the success of your market research.