What is the name of the survey method for determining the rank order of multiple items using a multiple question process?

I have seen surveys that use the following method to rank multiple items against each other. Let's say you have 25 items and you want to know their rank order (according to the survey-taker's preference). You pick 5 at random and ask the survey-taker to pick their favourite and least favourite of the group. You can then pick another 5 and repeat the process until the list is exhausted. You can then pick the favourites and rank them against each other and then do the least favourites and then the ones in the middle and through an iterative process, rank the entire list.

I'm guessing this survey method has a name and I was hoping someone could tell me what it is. If you know of a survey site that can implement it, that would be very helpful. Thanks.

I'm afraid I'm not answering your question exactly, but I am aware of a similar method called Q-sorting. This involves sorting items into a forced distribution according to predefined groups, such as, most/moderately/least true/preferred, and sometimes repeating this sorting process for the middle group to divide it into three intermediate groups (e.g., more/moderately/less). Typically, I think q-sorting forces answers into a quasi-normal distribution, so that the most items get sorted into the middle group, and the fewest items get sorted into the two extreme groups, but the number of items sorted into each group on either side of the middle group is symmetrical (e.g., same number of items sorted into both the most and least groups).