1 Claude Sonnet 5.5 Anthropic
Recommendation in brief
Scale SMS reminders. They are the only pilot with a clearly positive net effect (+EUR 2,500 over four weeks at North), and the result holds up under reasonable doubt about the evidence.
1. Change in no-show rate and no-shows avoided
Pilot rate = no-shows ÷ appointments. Avoided = (baseline rate − pilot rate) × pilot appointments.
| Intervention | Pilot rate | Baseline | Change | No-shows avoided |
|---|---|---|---|---|
| SMS (North) | 160/2,000 = 8.0% | 11.0% | −3.0 pp | 220 − 160 = 60 |
| Phone (South) | 60/1,200 = 5.0% | 6.5% | −1.5 pp | 78 − 60 = 18 |
| Depos...
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Recommendation in brief
Scale SMS reminders. They are the only pilot with a clearly positive net effect (+EUR 2,500 over four weeks at North), and the result holds up under reasonable doubt about the evidence.
1. Change in no-show rate and no-shows avoided
Pilot rate = no-shows ÷ appointments. Avoided = (baseline rate − pilot rate) × pilot appointments.
| Intervention | Pilot rate | Baseline | Change | No-shows avoided |
|---|---|---|---|---|
| SMS (North) | 160/2,000 = 8.0% | 11.0% | −3.0 pp | 220 − 160 = 60 |
| Phone (South) | 60/1,200 = 5.0% | 6.5% | −1.5 pp | 78 − 60 = 18 |
| Deposit (East) | 45/1,500 = 3.0% | 12.0% | −9.0 pp | 180 − 45 = 135 |
2. Net financial effect per pilot (four weeks)
SMS: value 60 × 45 = 2,700. Cost 2,000 × 2 × 0.05 = 200. Net = +EUR 2,500.
Phone: value 18 × 45 = 810. Cost 1,200 × 1.50 = 1,800. Net = −EUR 990.
Deposit: value 135 × 45 = 6,075. Admin cost 1,500 × 0.80 = 1,200.
Lost bookings: East fell from 1,875 to 1,500 (−375). The manager attributes all of this to the deposit. But West, with no intervention, also fell 8% (2,500 → 2,300). Applying that same 8% drop to East gives about 1,725 expected bookings (1,875 × 0.92). So the deposit is responsible for about 225 lost bookings (1,725 − 1,500). Cost: 225 × 30 = 6,750.
Net = 6,075 − 1,200 − 6,750 = −EUR 1,875.
If the manager were right (375 lost, cost 11,250), net would be −EUR 6,375. The deposit has the largest effect on behaviour but loses money under either view.
3. Scale-up recommendation: SMS reminders
Assumption: SMS cuts no-shows by the same relative amount as at North. That is 3.0/11.0 = 27.3% of baseline no-shows. I apply this to the network's 9.0% rate. This is more cautious than assuming the full 3.0 pp carries over, because the network's baseline is lower than North's.
- Network no-shows at baseline: 9,000 × 9.0% = 810
- Avoided: 810 × 27.3% ≈ 221
- Value: 221 × 45 ≈ EUR 9,940
- Cost: 9,000 × 2 × 0.05 = EUR 900
- Net ≈ +EUR 9,000 per four weeks (about EUR 9,040)
This is a rough figure. North's appointments are already in the network total, so the estimate is slightly generous.
4. Two limitations
1. The baseline is last year's same four weeks, not a concurrent control.
Each effect is measured against last year. Demand, patient mix and no-show trends may have moved for reasons unrelated to the interventions. West's no-show rate was flat, which is mildly reassuring. But West is a single clinic, and I used it to estimate the booking decline at East.
- Effect on the recommendation: this matters most for the deposit. If fewer than about 100 of East's lost bookings were due to the deposit (my estimate is 225), the deposit's net per appointment would beat SMS. If the manager is right, it is far worse. SMS stays positive unless it avoided fewer than about 4.5 no-shows (EUR 200 ÷ 45) against 60 observed, so it is unlikely to change.
2. Each intervention was tested at one clinic for only four weeks, with no randomisation.
Clinics differ in patients, baseline rates and staff. The SMS result may not transfer to the other five clinics. Four weeks also cannot show whether texts lose effect over time, or whether the deposit damages bookings in the longer term.
- Effect on the recommendation: SMS would stay positive even if the network effect were much weaker. It breaks even at about 20 avoided no-shows out of 810, less than 10% of the projected 221. A weak result would still not justify the phone calls (which need about 40 avoided no-shows at South's scale, against 18 observed). It might, however, make a randomised or staggered rollout of SMS, with a deposit retest, worthwhile.
Conclusion
Roll out SMS reminders network-wide. Do not scale phone calls, which cost more than the no-shows they avoid. Do not scale the deposit as designed. It prevents the most no-shows, but the bookings it loses cost more than it saves.
A strong, accurate answer. Every pilot figure matches the expected values. The West-based adjustment is used to attribute 225 lost bookings to the deposit, and the manager's 375 is flagged as the alternative case. SMS is correctly recommended, with a stated relative-transfer network estimate of about EUR 9,040 and an explanation of why it is more cautious. There are exactly two limitations, each tied to the decision with quantified thresholds. It falls short of 9+ because it never states that phone reminders would lose money even at the highest baseline in the data (12.0%). It does give South's break-even of about 40 avoided no-shows, but not the 3.3 pp versus 1.5 pp comparison.
Score by criterion
Depth
All checklist items are fully covered: pp changes and avoided no-shows for all three, net calculations shown including deposit lost bookings under both attribution views, and a network estimate with a stated assumption. Break-even analysis adds depth. It misses the explicit point that phone calls fail even at a 12% baseline.
Correctness
All figures match: -3.0/-1.5/-9.0 pp; 60/18/135 avoided; +2,500, -990, and -1,875 for the deposit (with -6,375 under the manager's view). The network figure of about EUR 9,040 is correct for relative transfer. The break-even thresholds (100 bookings, 20 no-shows, 40 for phone) check out. The 9+ condition on phone at the highest baseline is unmet.
Reasoning Quality
The answer challenges the manager's claim using West as a control and explains why relative transfer is more cautious. Each limitation is linked to concrete thresholds that would flip or preserve the decision. The note that North's appointments sit inside the network total is a minor, slightly muddled aside.
Structure
Sections are clear and follow the task order, with a useful table. There are exactly two limitations, each with an explicit effect on the recommendation. The upfront summary and conclusion frame the advice well.
Clarity
At 628 words it sits within the 500-750 range. Calculations are shown concisely and are easy to follow. Wording is plain and direct, though the limitation bullets are somewhat dense with numbers.
A strong, decision-ready analysis with correct pilot calculations, an appropriate West-adjusted estimate of deposit-related booking losses, and a clearly stated, cautious network-transfer assumption. It meets the word limit and provides exactly two limitations tied to the decision. The main omissions are the requested high-baseline robustness check for phone reminders and a clear distinction between total network benefit and incremental benefit beyond the existing North pilot.
Score by criterion
Depth
Covers all required rate changes, avoided no-shows, financial calculations, and the network estimate. The limitations include useful break-even sensitivity analysis. It does not explicitly explain that phone reminders would remain loss-making even at the highest baseline rate in the data, or give the associated approximately 3.3-percentage-point break-even reduction.
Correctness
All principal results match the expected values, including the deposit's 225 attributable lost bookings and EUR 1,875 loss, and the approximately EUR 9,040 relative-transfer network benefit. The statement that including North makes the network estimate slightly generous is imprecise: including North is appropriate for total network benefit, while incremental benefit beyond the pilot requires a separately defined comparison.
Reasoning Quality
Correctly compares changes against each clinic's baseline rather than ranking raw rates, challenges the manager's attribution using West, and explains why relative transfer is more cautious. Sensitivity thresholds strengthen the recommendation. However, saying that confounding is unlikely to change the SMS decision is more confident than the nonrandomised evidence supports; a low financial break-even threshold does not establish causality.
Structure
The sections closely follow the requested analysis, with a useful comparison table and exactly two numbered limitations, each explicitly connected to how the recommendation could change. Exactly one intervention is recommended. The opening and closing recommendations are somewhat repetitive but do not impede navigation.
Clarity
The answer is readable, uses clear units and transparent calculations, and meets the measured 628-word length requirement. The network estimate would be cleaner with one consistent rounded figure rather than both EUR 9,000 and EUR 9,040, and with a clearer explanation of total versus incremental network benefit.
The analysis is exceptionally well executed, accurate, and cleanly structured within the required word limit. All calculations match the benchmark expectations, including the control adjustment using the West clinic. The response falls just short of a 9+ score across criteria solely because it does not explicitly point out that phone reminders fail to break even even under the network's highest baseline no-show rate (12.0%, requiring a 3.3 pp reduction).
Score by criterion
Depth
Covers every required element thoroughly, including percentage-point changes, avoided no-shows, net financial outcomes with full breakdown, network scaling with justified transfer assumptions, and thoughtful limitation analysis. Missing only the explicit break-even analysis for phone calls against the highest baseline rate (12.0%).
Correctness
All calculations are completely accurate, correctly utilizing the West clinic control trend to deduce the 225 attributable lost bookings while also providing the alternative scenario based on the manager's claim.
Reasoning Quality
Sound economic and operational reasoning throughout. The choice of a relative transfer assumption for scaling is logically justified, and the sensitivity analysis in the limitations section shows rigorous critical thinking.
Structure
The structure strictly mirrors the required points, presents exactly two limitations tied directly to potential changes in recommendation, and utilizes clear formatting.
Clarity
The writing is concise, professional, and easy to follow. The response length of 628 words falls comfortably inside the 500-750 word target range.