A service cannot be stored like a product: an unsold hour is lost, but an oversold hour can degrade lead time, qualit…
A service cannot be stored like a product: an unsold hour is lost, but an oversold hour can degrade lead time, quality and retention. Services marketing must arbitrate demand, price, priority and capacity in the same calculation. Utilisation is not enough: reserve capacity for requests whose contribution and urgency warrant access, while retaining operational slack for uncertainty.
Decision and method.
Choose a reservation rule that maximises expected contribution under an explicit quality constraint rather than first-come, first-served uniform filling. Express every request in comparable capacity units—minutes, hours, room-nights or slots—correcting durations by segment and including no-shows, cancellations and rework. Group requests by expected contribution, urgency, flexibility and cost of refusal; classes must be identifiable before allocation without prohibited or unjustifiable characteristics. Reserve volume for high-value classes, set safety capacity from overload cost and test several demand levels. Track refused demand, waits, overtime, contribution and repeat purchase; tighten a rule that raises revenue but durably harms quality.
Worked example.
A team has 100 slots: demand is 32 urgent cases at €110 contribution, 70 scheduled at €65, 40 flexible at €40. First-come serves 20 urgent, 50 scheduled and 30 flexible: €6,650. Full economic allocation serves 30, 50, 20: €7,350. With five safety slots it serves 30, 50, 15: €7,150. Retain the reserve if expected weekly cost of delays, rework and overtime exceeds €200. It still improves contribution by €500 versus first-come.
Checks and limits.
Express demand and contribution in homogeneous capacity units; apply and explain priority before delivery; compare overload cost with contribution of sacrificed slots; monitor quality, refusal, lead time and repeat purchase with utilisation. High contribution does not justify unlawful customer discrimination. Historic durations and no-shows can change after price or journey changes; one-period model misses some loyalty and reputation effects.
Resources and sources.
Download the service-capacity model. Related: structure price tiers, choose 4P or 7P, audit interactions. Sources: Talluri and Van Ryzin (2004); Campbell and Frei (2011); Lovelock (1983).