A useful business case study helps a prospective customer understand how you work and whether that approach suits their situation. It explains the problem, the choices made and what happened, with enough detail for the reader to assess the relevance.
Start by choosing a project that answers a buying question. A modest project with a clear explanation can be more useful than an impressive client name followed by a vague claim of success.
Choose the decision the case study should support
Ask what a prospective customer needs to know before enquiring. They may want to understand the delivery process, how you handle constraints or what their own team would need to contribute.
A fictional design studio could use an office project to explain how it worked around a customer’s operating hours. The useful subject is the delivery approach: access arrangements, approvals and sequencing. The finished photographs support that account, but cannot explain the decisions on their own.
Write down the reader’s question before interviewing anyone. This gives the case study a purpose and helps you leave out detail that does not assist the decision.
Establish the starting point
Describe what the customer needed and the conditions that shaped the work. Include the relevant starting position, requirements and constraints. Avoid turning the customer into a problem for the sake of a dramatic introduction.
Explain any baseline used to assess a result. If you compare performance before and after a project, state what was measured and over which periods. If no reliable baseline exists, describe the verified delivery and feedback without inventing one.
A reader should be able to distinguish the original objective from the outcome eventually achieved. They are different parts of the story, even when the project went to plan.
Explain the choices behind the work
Move beyond a list of services delivered. Explain why the team chose a particular approach, what alternatives it considered and how it responded to a constraint. These details show what working with you might involve.
For the fictional office project, the account could describe why the studio divided work into phases, which tasks required the customer’s approval and how the team managed access. Each detail should come from the actual project record when you write a real case study.
Include the customer’s contribution where relevant. A result may depend on timely feedback, staff participation or changes the customer made. Acknowledging that shared work produces a more accurate account and helps future clients prepare.
Match each outcome to its evidence
Use an evidence check before writing the results section. For each proposed statement, identify the record supporting it, the period it covers and any important qualification.
- Delivery: What was completed, and can the scope and timing be verified?
- Performance: Which measure changed, and is the comparison like for like?
- Feedback: Who gave the comment, and have they approved its use?
- Attribution: What other work or circumstances may have contributed?
“The new booking form went live” describes a delivery. “The booking process became easier to use” needs a basis, such as documented user feedback or observed task testing. Neither statement should quietly become a claim that revenue increased.
Agree what can be published
Check the client’s permission for names, logos, quotations, images and project information. Ask the relevant people to review the factual account and keep a record of agreed wording. Make sure any photographs can be used for the intended purpose.
If details cannot be shared, explain the project at a suitable level without leaving clues that defeat the anonymity. A confidential case study also needs sufficient substance to be useful; replacing every meaningful fact with a broad adjective rarely helps a reader.
Never present a hypothetical example as client work. Examples can explain your approach when clearly labelled, but a case study should describe something that happened.
Finish with a useful lesson and next step
Explain what a similar customer should consider before starting. That might be allowing time for approvals, preparing a clear brief or agreeing who owns a measurement task. Link to the relevant service so readers can explore the next step.
Check that the finished piece answers its original buying question. Read it alongside the service page: the case study should provide evidence and context, while the service page explains the current offer.
For more ideas grounded in real buying decisions, see how customer enquiries can inform your content. Empty Lemon can help organise your evidence and develop clear case studies through its marketing services.