Marketplace supply. Are providers available where demand is?

A marketplace has more searches, slower growth in completed bookings and a modest increase in providers. The immediate suggestion is to recruit more providers.

Before agreeing, ask what a customer can actually book. A provider who is registered but unavailable on Saturday evening does not help a customer seeking a Saturday evening appointment.

The next analysis should match supply to the place, time and service customers requested.

Read growth rates as clues, then ask for levels

In this fictional case, searches grew 30%, completed bookings 8% and provider headcount 5% across comparable periods.

Suppose the underlying counts are:

MeasureEarlier periodCurrent period
Searches10,00013,000
Completed bookings5,0005,400
Registered providers100105

Completed bookings per search fell from 50% to 41.5%. The marketplace is handling more jobs, but a smaller share of expressed demand becomes a completed booking.

That result does not tell you whether the obstacle is availability, price, matching, booking friction or cancellations. It tells you where the diagnosis needs to begin.

Ask for supply in usable units

I would ask:

“Can we compare requested appointments with available slots by neighbourhood and day, alongside bookings and completions? I want to see whether the gap is broad or concentrated.”

Provider headcount is a stock. Available appointment slots describe what can be sold during the period. Completed jobs show what the marketplace actually delivered.

Define supply around successful matching in the customer's location and time window. A directory of profiles does not show whether the requested service is available.

A Bristol home-tutoring marketplace sees maths requests climbing while bookings stay flat. Before approving a tutor recruitment drive, the team pulls four supply metrics.

Which kind of supply does each metric actually measure?

Locate the mismatch before choosing the lever

Suppose two underserved neighbourhoods show this weekly pattern:

PeriodRequested slotsAvailable slots
Weekdays300600
Weekends500200
Total800800

Aggregate supply equals aggregate demand. Yet, even with perfect matching within each row, the marketplace can fulfil only 300 weekday plus 200 weekend requests = 500.

There are 300 unused weekday slots and 300 unmet weekend requests. Broad recruitment could add more weekday availability and leave the weekend problem unchanged.

The useful next question is whether existing providers can shift some availability, what it would cost and whether moving those slots would sacrifice actual weekday jobs.

Compare two concrete ways to add weekend slots

The case offers two options for a four-week pilot in the affected neighbourhoods:

OptionAdded weekend slots over pilotExpected completed shareCost
Schedule incentives20090%£8 per added available slot
Targeted recruitment24090%£3,000 onboarding plus £3 per completed job

Assume every additional completed job contributes £15 before these programme costs. The incentive option shifts currently unused weekday capacity, so the exercise gives no displaced weekday contribution.

Schedule incentives generate 180 completions and £2,700 contribution, less £1,600 incentives, leaving £1,100 over the pilot.

Targeted recruitment generates 216 completions and £3,240 contribution, less £648 ongoing cost and £3,000 onboarding, leaving −£408 in the first pilot period.

On this short horizon, incentives are financially stronger and quicker to test. But that does not settle the long-term choice.

A Manchester dog-grooming marketplace is turning away Saturday requests in two suburbs. It can fund one four-week pilot.

Contribution per job
£12 per completed groom, before programme costs
OptionAdded Saturday slotsCompleted shareProgramme cost
Schedule incentives20090%£4 per added slot
Groomer recruitment30060%£1,200 one-time onboarding

Which option yields more net contribution over the four-week pilot?

Choose your answer

Keep one-time costs and recurring costs separate

If recruited providers supply the same 240 slots in a second four-week period without another onboarding charge, their contribution after the £3 per completed job is 216 × (£15 − £3) = £2,592.

Across two periods, targeted recruitment generates 2 × £2,592 − £3,000 = £2,184. Two comparable incentive periods generate £2,200. Across three, recruitment reaches £4,776, versus £3,300 for incentives.

That comparison depends on retained provider availability and stable demand. It suggests a sensible sequence: use incentives to test near-term demand while assessing whether targeted recruitment can provide durable supply.

A recommendation based only on the first-period loss would miss the value of spreading a one-time cost across continuing activity.

Check whether advertised slots become reliable service

Available slots can disappear if providers cancel, reject requests or forget to update calendars. Track the full chain: slot displayed, booking made, provider accepted and job completed.

If weekend slots increase but completions do not, look at that chain before increasing the incentive. Paying for an advertised slot can create the wrong behaviour when the objective is a completed job.

The incentive design might therefore need to reward reliable completion, while still recognising that providers bear a cost when reserving time. The case should tell you enough to compare those trade-offs; do not assume a payment rule solves every behaviour automatically.

State the next move with the location and time attached

“The shortage is concentrated in weekend availability in two neighbourhoods. I would pilot schedule incentives there and measure incremental completed jobs and contribution. In parallel, I would assess targeted recruitment over a longer horizon, because its onboarding cost is recovered only if the added supply persists.”

This is more precise than “we need more providers.” It names the constrained supply, the immediate intervention and the question that determines the durable solution.

Try Home-Services Marketplace Fill-Rate Decline. Before choosing recruitment, specify the available service unit and the comparison you need. The data-request guide shows how to trace an earlier stage of this diagnosis through a booking funnel.

Prioritisation drill

How would an MBB interviewer judge your prioritisation?

Home-Services Marketplace Fill-Rate Decline

Choose what to investigate first and explain why. Get feedback on your choice, supporting evidence and next step.

Frequently asked questions

Diagnosing where supply falls short

Should a marketplace with rising searches simply recruit more providers?

Not before checking what customers can actually book. A provider who is registered but unavailable on Saturday evening does not help a customer seeking a Saturday evening appointment. Diagnose the gap by neighbourhood, day and service first, because the constraint may be when providers work rather than how many there are.

Why ask for underlying counts when I already have growth rates?

Counts reveal the conversion story that percentages only hint at. Searches rose from 10,000 to 13,000, while completed bookings rose from 5,000 to 5,400. Completed bookings per search therefore fell from 50% to about 42%. More customers are searching and failing to book, which signals unmet demand.

What is the right way to measure marketplace supply?

Measure supply in units that can be matched to demand. Provider headcount is a stock. Available appointment slots show what can be sold in the period, and completed jobs show what was delivered. Ask to compare requested appointments with available slots by neighbourhood and day, alongside bookings and completions.

How can total supply equal demand and still leave customers unserved?

Supply and demand can fall at different times. In the two underserved neighbourhoods, there are 800 requested and 800 available slots each week. However, weekends have 500 requests against only 200 slots. Even perfect matching fills just 500 requests, leaving spare weekday capacity and unmet weekend demand.

Do weekday slots matter if the shortage is at weekends?

Yes, as a clue to the right lever. The two neighbourhoods have 600 weekday slots for 300 requests, so 300 weekday slots go unused. That spare capacity suggests existing providers might shift some hours to weekends, which is what schedule incentives aim to encourage, before you pay to onboard new providers.

Comparing incentives with recruitment

Which option performs better in a single four-week pilot?

Schedule incentives perform better on the case figures. They add 200 slots at £8 each, costing £1,600, and a 90% completed share gives 180 jobs. Using the case's £15 contribution per job, incentives net about £1,100. Recruitment yields 216 jobs, but its £3,000 onboarding cost leaves the first period slightly negative.

When does targeted recruitment become the better choice?

Recruitment wins once its onboarding cost is spread over enough periods. After two comparable periods, it earns £2,184 against £2,200 for incentives, almost level. After three periods, it reaches £4,776 versus £3,300. This assumes recruited providers keep supplying the same 240 slots without another onboarding charge.

What if recruited providers drop out after the first month?

Then recruitment probably loses. The £3,000 onboarding cost is recovered only if the added supply persists. In a single period, it exceeds the contribution the new slots generate. Before backing recruitment, test retention, because the longer-horizon comparison depends entirely on providers staying active.

Turning added slots into completed jobs

What if weekend slots increase but completions do not?

Trace the full chain before raising the incentive: slot displayed, booking made, provider accepted and job completed. Slots can disappear when providers cancel, reject requests or forget to update calendars. Find the stage where weekend bookings fail, because paying more for slots will not fix acceptance or reliability problems.

Is paying providers per available slot a risky incentive?

It can be. Paying for an advertised slot rewards listing availability, while the objective is a completed job. Providers could post slots they do not reliably honour. Watch the £8 per added slot against completion rates. My recommendation is to consider rewarding delivered work if listed slots fail to convert.

What should the pilot measure?

The pilot should measure incremental completed jobs and contribution in the affected neighbourhoods, not just slots listed. Incremental jobs matter because some weekend bookings would have happened anyway. Tracking contribution keeps the incentive cost in view, so you can judge whether the extra completions justify what was paid for them.

How should I phrase the recommendation in the interview?

Name the location, the time and the lever. For example, say the shortage is concentrated in weekend availability in two neighbourhoods. Then pilot schedule incentives there while assessing targeted recruitment over a longer horizon. That is far more precise than saying the marketplace needs more providers.

Marketplace supply: Case Interview Example | Case Room