A case study is one of the most misunderstood assignments at university. Students treat it like a story — a long retelling of what happened — and then wonder why the marker gave them 55%. The truth is that a case study is an argument built on evidence. You are not just describing a case; you are analysing it through a theoretical lens and reaching conclusions that could apply beyond it.
This guide walks you through the process using a running example: a nursing case study of a 68-year-old patient who developed a post-operative wound infection after hip replacement surgery.
What a Case Study Actually Is (and Isn’t)
A case study is an in-depth investigation of a single unit: one patient, one company, one school. Its strength is depth.
It is not a summary. A retelling of events with no analysis is a case description, and markers rarely reward it. It is also not an opinion piece: “I think the company was badly managed” means nothing without evidence and theory behind it.
The test is simple: if a reader finishes your case study and says “interesting story,” you have under-analysed. If they say “I now understand why this happened and what should be done about it,” you are on the mark.
Know Your Case Study Type
Markers often expect you to name the type you are writing. The four commonly taught categories:
- Exploratory. Used when little is known about the phenomenon. You are investigating, not proving.
- Descriptive. A rich, detailed account of what happened and why it matters. Much undergraduate nursing work falls here.
- Explanatory. You test a theory or explain cause and effect. The business example — why did this expansion fail? — is typically explanatory.
- Intrinsic vs. instrumental. An intrinsic study examines a case because the case itself is interesting; an instrumental one uses it to illuminate a wider issue (what one patient’s infection reveals about ward hygiene compliance).
You do not need a paragraph on taxonomy. One sentence in the introduction — “This is an instrumental, explanatory case study” — tells the marker you know the conventions.
The Standard Structure
Most university case studies follow the same skeleton. Your module handbook may vary the order, but these sections will not let you down:
- Title page and abstract (if required)
- Introduction — the case in one paragraph, your research question, the type
- Case description — the facts, organised and relevant
- Methodology — how you gathered and analysed your information
- Analysis and discussion — the heart of the paper
- Conclusion and recommendations
- References
We will take each in turn with the nursing example.
Step 1: Write the Introduction
Your introduction should do three things in roughly 150–200 words: present the case, state your question, and signpost the structure.
A common approach is to anchor the case in a wider problem before zooming in:
Surgical site infections affect an estimated 1–3% of patients after hip replacement surgery. This case study examines the post-operative course of Mrs Alvarez, a 68-year-old woman who developed a deep wound infection, and asks what her care reveals about staffing continuity and the early detection of deterioration.
Notice what it does not do: it does not open with “Since the dawn of time, hospitals have treated patients.” It states the case, the question, and the scope. Setting that up cleanly is the same skill as writing a strong thesis statement — a single controlling claim that keeps the whole piece aimed at one target.
Step 2: Describe the Case
The case description section presents the facts: who, what, where, when, in chronological order. Include only facts that serve the analysis — this is the discipline most students lack. Mrs Alvarez’s admission history matters; her granddaughter’s name does not.
For a nursing case, organise clinically:
- Presenting history. 68-year-old woman, elective total hip replacement, type 2 diabetes (poorly controlled).
- Timeline. Surgery day 0. Wound redness noted day 3 but not escalated. Fever 38.6°C day 4. Swab taken and antibiotics started day 5. Debridement day 8. Discharge day 21.
- Key data. Lab results, observations, medication changes — in small tables, which read better than dense paragraphs.
Anonymise everything. Change names, dates, and identifying details, and state that you have done so: “Identifying details have been changed to protect patient confidentiality.”
Step 3: Explain Your Methodology
Students often skip this section. Saying how you handled your material shows critical awareness and carries marks on its own.
Cover briefly:
- Data sources. Clinical notes, wound charts, ward policy, two staff interviews.
- Analytical approach. Thematic analysis of transcripts; the clinical timeline cross-checked against policy.
- Limitations. Only two interviews were possible; the patient herself was not interviewed; notes varied in completeness.
Keep this to 150–250 words. It is a case study, not a dissertation — but do not throw away easy marks for rigour.
Step 4: Analyse — This Is Where the Marks Live
The analysis and discussion section should be the longest part of your case study, typically 40–50% of the word count. This is where you connect the case to theory and literature. The formula for each analytical point is simple:
Point from the case → relevant theory or evidence → what it shows.
Mastering that move is the same skill behind strong academic paragraphs generally — students who struggle with it often start with our essay writing service page before tackling a full case study.
- Delayed escalation. The night nurse noticed redness on day 3 but did not escalate because the patient “looked comfortable.” This reflects a documented pattern: junior staff often defer to appearance-based judgement rather than protocol-driven escalation — a key finding in the failure-to-rescue literature. The implication is not individual incompetence; it is that the system relied on vigilance instead of routine, auditable escalation.
- Diabetes and infection risk. Mrs Alvarez’s poorly controlled diabetes was recorded at admission, yet no targeted wound-monitoring plan was created. NICE guidance on surgical site infection prevention is explicit about risk assessment for diabetic patients. The gap between policy and the plan is the analytical finding — the infection was the predictable consequence.
- Continuity of care. Eleven different nurses saw the patient in the five days before escalation, and no single nurse “owned” the wound’s progression. This links directly to the evidence on staffing continuity and patient outcomes: discontinuity makes subtle deterioration easier to miss.
Each point moves from fact, through literature, to interpretation. That is what “analysis” means — and it is what separates a merit from a distinction.
Step 5: Conclude with Recommendations
Your conclusion answers the question set in the introduction and converts findings into recommendations.
Good recommendations are:
- Specific. Not “improve communication” but “introduce a twice-daily wound-assessment round, documented in a shared chart, for all post-operative patients.”
- Grounded in the case. Every recommendation should trace back to something your analysis actually found.
- Honest about scope. You cannot fix national staffing levels in one recommendation. Say what the case can and cannot support.
A brief nod to the limits of generalisation is essential. One case proves nothing universally; it suggests, illuminates, and informs. Markers look for that humility.
Common Mistakes That Cost Marks
All description, no analysis
The most frequent failure. A 2,000-word case study with 1,400 words of description and a thin 400-word discussion is upside down. Aim for roughly a third description and half analysis and discussion. On your final read-through, the discipline from our essay proofreading checklist applies: highlight every paragraph that merely describes and check each one says why it matters.
Weak or decorative link to theory
Dropping a theorist’s name without showing how their framework explains your case earns nothing. Every reference to literature should do work.
Confidentiality and ethics slips
Including a real patient’s name, a company’s internal documents without permission, or identifiable details is a serious error — at many universities it is an automatic fail. Pseudonymise, aggregate, and state your anonymisation steps explicitly.
Conclusions that overgeneralise
“This case proves that all hospitals should restructure their wards” is indefensible from one case. Phrase conclusions carefully: “suggests,” “indicates,” “raises questions about.” One strong, cautious claim beats three bold, unsupported ones.
A Quick Checklist Before Submission
- [ ] The introduction states the case, the question, and the case study type.
- [ ] The description includes only facts the analysis actually uses.
- [ ] Analysis is the longest section (roughly half the word count).
- [ ] Every analytical claim links the case to theory or published evidence.
- [ ] Methodology and limitations are stated briefly and honestly.
- [ ] Names and identifying details are anonymised, and this is declared.
- [ ] Recommendations are specific and trace back to the findings.
- [ ] Conclusions are cautiously worded — no overgeneralising from a single case.
- [ ] References are complete and correctly formatted.
- [ ] The whole piece has been read through once for flow and proofreading.
For citation help, the Purdue OWL writing lab covers academic style in detail, and the University of Southampton’s library study-skills guides are excellent on structuring extended assignments.
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