Marketing case studies: take a decision from facts to a reviewable deliverable

Case studies turn a decision into a traceable working file. They do not provide universal recipes: the relevant unit, horizon, comparator, constraints and evidence level depend on the case.

What a case must make visible

Start with the decision rather than the tool: change a price, reallocate a budget, open a channel, redesign an offer or protect a service threshold. State the baseline, the options that are genuinely available, the economic metric, the uncertainty that could reverse the choice and the owner of the next review. Separate observed facts, calculated outputs and assumptions so that an illustrative result cannot be mistaken for market performance.

A reproducible decision path

Describe the scope, period, data sources, units and transformations before calculating. Compare options on the same assumptions, including contribution, capacity, transition cost, risk and reversibility. A recommendation remains conditional when its counterfactual, causal identification or observed range is incomplete. Record the stopping condition and the evidence that would change the decision.

Questions to start with

• Which decision has a material cost of error now?
• What would happen without the proposed change?
• Which amount is movable without breaking a minimum, contract or capacity?
• Which signal would stop, reverse or extend the decision?

Limits of a case

Educational cases can use synthetic data and simplified mechanisms. They demonstrate a method and its controls; they do not reproduce a company result or guarantee future contribution. Reuse the structure, then replace every assumption with data and constraints from the decision under review.