In a Human Centered Guild system, it is clear that one of the most important problems solved is the one concerning the quality of the tasks. As seen in , "Comparing quality between different pay per label sets (instead of pay per HIT), see rows 11-14 in Table 2, confirms the same trend: quality increases with pay. However, we can also observe evidence of a diminishing return effect, whereby the rate of increase in pay is matched by a slowing (or dropping) rate of increase in quality". Therefore, even if the amount paid for a certain task affects the outcome of it by enhancing quality, it comes bounded by a top-limit in which we see that beyond a certain point it doesn't matter anymore how much one pays because the quality will not be affected significantly. With this in mind, we're able to clearly state the problem we're solving in this submission: How can we assure that the Guilds system will increase the overall quality of tasks?
It is thoroughly known that one the major issues in crowdsourcing platforms is the lack of guarantee that a task will have a high-quality outcome. Several factors come into play when we think of the reasons for that to happen: The amount paid, the qualification of the worker in relation to the skill set required by that specific task and many others.
 - In Search of Quality in Crowdsourcing for Search Engine Evaluation, Gabriella Kazai