Since last we have started to create our pop-app which other students during the exercise are going to evaluate. It’s going to be really interesting to see how they interact with it and what they think about it. It’s absolutely not perfect and there are several improvements that can be done. For example I think that the price of your chosen tickets should be shown one step earlier when you actually are deciding how many of each ticker you are going to buy. It will also be interesting to see how the students will act as our experts. Since they all are young and think in similar ways they could be more and less sensitive to the same kind of design flaws and then our result would get distorted.
We have agreed in the group that we’re going to base our evaluation on the DECIDE framework since it’s fit this project purpose quite well. To use this we have must choose the evaluation methods. While it’s possible to use several of them to obtain richer data we’re limited in time and therefore we’re just going use one of them. We had several inspection methods that we could use. We choose to use the heuristic evaluation to evaluate our pop-app since we all think it’s good and it fits the purpose of the next exercise when we’re going to let other students act as experts while evaluating our app. The method is based on heuristics and the ones we are going to use are the Nielsen’s 10 Usability Heuristics.
We have also discussed how we could evaluate our project if we would have unlimited time and resources. If we had that it would put us in a really interesting position, the kind of position of big companies like Apple and Google. One very important thing is that we would be able to create the app on a real ticket machine down the subway.
I think we could still use the DECIDE framework but we could use more and bigger evaluation methods. For example we could still use the heuristic evaluation but we could have even more experts than we are going to have now. This is something they show a graph of in the book that the proportion of usability problems found gets increased by the number of experts. Also these experts would be educated in evaluation and therefore they would detect more design flaws than the students. They could also give us better solution options.
I talked about using more evaluation methods if we had unlimited resources and another one I think is really good in combination with the heuristic evaluation is a wild study. We could change SL:s whole system on one ticket machine for a day. Then we could have cameras observing how people interact with it. We could also use a predictive model like the GOMS since it would be much easier to apply if we had everything we wanted. A problem that get bigger is the number of ethical issues which would arise using cameras. I think we would be able to handle them though due to our unlimited resources.
// Viktor Bram
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