This subject is very, very easy for a level 3. It's called risk analysis, but it could really be called "applications of common sense". It is designed to be just a general risk course, but as it is a core subject of the civil engineering majors it tends to have a greater focus on engineering risks rather than economic risks.
The subject is divided into three sections:
1. First three weeks is on qualitative risk analysis. You basically go over the definition of a risk, a hazard, identification and management strategies, and monitoring procedures. The lecturer for this section, Peter Bishop, is pretty good, but the material tends to get recycled through the 5 or so lectures, so this can be pretty dull and mundane. I'm sure you could get by without turning up by just scanning the lecture notes.
2. The next 5 weeks are on quantitative risk analysis. Lihai takes these and is very good despite it being a little difficult to understand what he is saying. These lectures basically consist of the applications (not derivations) of probability/statistical mathematics with concepts including distributions, confidence intervals, hypothesis testing, correlation, and monte carlo simulations. All concepts are illustrated with a tonne of examples, and there is nothing too complicated. You basically only need to know how to apply the formulas that are given rather than have a full understanding what the formula actually means.
3. The third section steps back into the qualitative side, with guest lecturers from engineering and financial firms giving a rundown on how risk is managed in their business. This is purely about drilling in the content from the first three weeks, and is also pretty unnecessary in regards to the assessment, but somewhat interesting nonetheless.
Both the assignments are group assignments, and groups of four are formed within the tutorial groups in week 1. You are given about 6 weeks to work on each assignment, but they are relatively easy and only take a few hours of solid work per group member to polish off. They aren't too difficult or onerous, but they are good at getting you to engage with the lecture content.
Probably the worst thing about the subject is the tutorials. They are basically just a review lecture, because the tutor talks the entire time about the previous week's content and goes through some questions. This would be useful if the content was somewhat challenging, but most of the material is either self-explanatory or explained well in the lectures making the tutes somewhat superfluous. Attendance is marked and counts for 10% of the assessment, so that (and meeting up with group members) was the only reason I turned up to most of them.
Overall, this is definitely not a subject to be scared of. Compared to most engineering subjects, it has a fairly limited scope and quite a slow pace. However, it is well taught and I'd even recommend it as a breadth if you wanted something that wasn't going to require much effort and were somewhat interested in the content, but presumably there is something more fun or valuable.