Decoding Examiner Reports: A Structural Engineer's Guide to Identifying Recurring Weaknesses

The IStructE membership exam – just the name can send shivers down the spines of even the most seasoned structural engineers. It’s a marathon, not a sprint, demanding sometimes months of dedicated preparation. But preparation isn’t just about doing past papers; it’s about understanding why candidates succeed or stumble. And that’s where examiner reports become invaluable. They’re often dense, sometimes cryptic, but within them lie the keys to unlocking your own success.

The Anatomy of an Examiner Report

Let’s be honest, first encounters with examiner reports can be… underwhelming. They aren’t marking schemes. They don’t tell you the right answer. Instead, they highlight common areas where candidates struggled, offering broad guidance. Think of them as a post-exam debrief, not a detailed solution manual.

Typically, you’ll find reports categorised by question, outlining:

• Common strengths: What candidates generally did well. This is useful to confirm you’re on the right track with your approach.
• Common weaknesses: The areas where most candidates lost marks. This is where your focus should be.
• Areas for improvement: More nuanced feedback, often pointing to a lack of depth, insufficient justification, or misapplication of principles.
• General observations: Overall trends observed by the examiners.

The challenge lies in translating these broad observations into actionable insights.

Recurring Themes: What Examiners Really Want

After sifting through years of reports (and talking to countless candidates), some clear patterns emerge. Here are some of the most frequently cited weaknesses:

• Insufficient Justification: This is the most common complaint. It’s not enough to state an assumption or choose a method; you must justify your choices. Why did you select that material? Why is that load combination critical? Examiners want to see your thought process, demonstrating a deep understanding of the underlying principles.
• Lack of Critical Assessment: The IStructE isn’t looking for rote application of formulas. They want engineers who can think critically, identify potential issues, and propose appropriate solutions. Don’t just calculate; interpret your results. What do they mean in the context of the problem? Are there any limitations to your analysis? Any further thoughts that strike you after the calculation that you should have considered - and why?
• Inadequate Consideration of Stability: Stability is paramount. Candidates often focus on strength but neglect to thoroughly assess buckling, overturning, or lateral stability. Always, always consider stability.
• Poor Communication: This isn’t just about grammar and spelling (though those matter!). It’s about clarity, conciseness, and logical presentation. Can the examiner easily follow your reasoning? Focus on your sketches. They are the easiest way to get thoughts across to examiners (who, like us, are probably very visual in how we communicate).

The Power of Visualisation: Beyond Calculations

I remember speaking with a candidate a few months after she’d passed. She confessed something that really stuck with me. She hadn’t been the strongest mathematician, but she’d obsessively practiced her sketching. “Not being able to draw is, what I think, really trips up people,” she explained. “Every single engineer who’s passed the IStructE exam has told me, and can themselves, draw so effectively. Of course you can write extensively about what your ideas are and why it'll work, but the only thing I've ever heard is that the examiners always go straight for the drawings to identify what your solution is and then even bother reading the rest of your answer. So if that's the first thing they're looking at, and they're very likely going to be making a judgement of you (even if partial) in those first 30 seconds, you better be able to communicate that you're smart enough with those drawings. Really practice on the clarity of your drawings, on using colours to identify the different load paths, soil conditions, the structure, the stability, absolutely everything that could possibly go into a drawing and its annotations need to be on it. Yes, you can write a perfect answer but they're probably just skimming through your written answer whereas they're really trying to gauge whether you're competent enough through the drawing. Focus on it, obsess over it, don't skip being able to draw your ideas quickly.”

This candidate’s experience isn’t unique. Examiners consistently emphasize the importance of clear, concise sketches. They want to see that you can visualise the problem, understand the structural behaviour, and communicate your solution effectively. Don’t treat drawings as an afterthought; integrate them into your thought process from the beginning. Use colour coding, annotations, and clear labelling to convey information efficiently.

Turning Weaknesses into Strengths: A Practical Approach

So, how do you proactively address these common weaknesses?

• Practice, Practice, Practice: Work through past papers, but don’t just focus on getting the “right” answer. Critically evaluate your solutions against the examiner reports.
• Seek Feedback: Ask colleagues or mentors to review your work. A fresh pair of eyes can often identify weaknesses you’ve overlooked.
• Develop a “Justification Checklist”:** Before submitting your work, ask yourself: Have I justified every assumption? Have I explained my reasoning?
• Embrace Sketching: Dedicate time to improving your sketching skills. Practice drawing different structural elements and load paths.
• Study Example Solutions: While full solutions aren’t always available, resources like Solved Past Papers offer access to candidate submissions, allowing you to compare your approach to others and learn from their successes and mistakes.