in many surveys, we set a time limit like 30mins.
suppose there are 60 quesions in survey. participant answer 20 quesions in 30mins, the last 40questions would be processed as null answer,not calculated the assessment value.
in many IQ test, we need to set a timer let partcipant know how much time left.
in many surveys, the answer timing will be calculated as a factor of assessment.
so i think time control is a necessary function. and the timing should be calculated in assessment as {timing}
i noticed LS already has timer for single question.then i raised this request.