The current success rate calculation is not accurate, and impacts negatively in the way the survey broker (SB) works.
The typical use case is: a survey starts with Initial success rate at 0.5% and a target of 100. The SB calculates a huge Batch Size 200000. After one day of survey the survey gets 10 completed and 15 exhausted respondents (the 10 completes, plus 5 extra refused/failed/noneligible), then the Actual Success Rate is 66%, then the Estimated Success rate (ESR) is 6.7% (134 times bigger than the ISR) and consequently the batch size drops from 200000 to 1341. The SB already activated +10.000 respondents by now, which it won’t “deactivate”.
The current success rate calculation is not accurate, and impacts negatively in the way the survey broker (SB) works. The typical use case is: a survey starts with Initial success rate at 0.5% and a target of 100. The SB calculates a huge Batch Size 200000. After one day of survey the survey gets 10 completed and 15 exhausted respondents (the 10 completes, plus 5 extra refused/failed/noneligible), then the Actual Success Rate is 66%, then the Estimated Success rate (ESR) is 6.7% (134 times bigger than the ISR) and consequently the batch size drops from 200000 to 1341. The SB already activated +10.000 respondents by now, which it won’t “deactivate”.