Round 90

Cold Chain Last-Mile Delivery Optimization

A luxury grocery delivery service is experiencing a 12% spoilage rate in temperature-sensitive goods during 'last-mile' transit. Current operations use generic refrigerated vans with high idling costs and frequent mechanical failures due to constant door opening. The goal is to reduce spoilage to under 3% and lower carbon intensity while maintaining delivery speed. Constraints include a fixed capital expenditure budget for this quarter and a promise of 2-hour delivery windows to customers. Tradeoffs involve upfront costs, operational complexity, and payload flexibility.

Dashboard

Status

DECIDED

Winner

C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts.

Majority

C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts.

Duration

4991 ms

Topic

Options

C Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts.
3.00 of 3 PPV winner
A Phased transition to specialized tri-temperature modular electric light vehicles (eLCVs) with isolated compressor units.
0.00 of 3
B Outsource the final 5 miles to a specialized third-party cold-chain logistics provider via a per-delivery variable cost contract.
0.00 of 3
D Shift to a decentralized 'micro-hub' model using non-refrigerated cargo bikes equipped with active-cooling IoT delivery boxes.
0.00 of 3
E Implement an AI-driven dynamic routing engine that prioritizes thermal-sensitive orders based on real-time ambient temperature and delivery density.
0.00 of 3

Checks

Baselines

PPV no gold answer
Majority no gold answer
Comparison PPV matched majority
k samples8
Agents3
Parsed samples 24 / 24
Quality near unanimous split

PPV

Top Influences

Gemini 3 Flash Preview · delegate 1.322
Claude Sonnet 5 · delegate 1.174
GPT 5.4 mini · delegate 1.106

Samples

Answer Distribution

Claude Sonnet 5 C: 7 E: 1
GPT 5.4 mini C: 5 A: 3
Gemini 3 Flash Preview C: 8

PPV

Influences

Label Role Score
Gemini 3 Flash Preview delegate 1.322
Claude Sonnet 5 delegate 1.174
GPT 5.4 mini delegate 1.106

Voting matrix

Constructed Delegation Matrix

To / From Claude Sonnet 5 GPT 5.4 mini Gemini 3 Flash Preview
Claude Sonnet 5 0.0000.1740.000
GPT 5.4 mini 0.1060.0000.000
Gemini 3 Flash Preview 0.1060.1740.000
A 0.0000.0000.000
B 0.0000.0000.000
C 0.7890.6521.000
D 0.0000.0000.000
E 0.0000.0000.000

Embeddings

Sample Embeddings

24 samples
Claude Sonnet 5 sample #0 · C · 1536 dims C Claude Sonnet 5 sample #1 · C · 1536 dims C Claude Sonnet 5 sample #2 · C · 1536 dims C Claude Sonnet 5 sample #3 · C · 1536 dims C Claude Sonnet 5 sample #4 · C · 1536 dims C Claude Sonnet 5 sample #5 · E · 1536 dims E Claude Sonnet 5 sample #6 · C · 1536 dims C Claude Sonnet 5 sample #7 · C · 1536 dims C GPT 5.4 mini sample #0 · C · 1536 dims C GPT 5.4 mini sample #1 · C · 1536 dims C GPT 5.4 mini sample #2 · C · 1536 dims C GPT 5.4 mini sample #3 · A · 1536 dims A GPT 5.4 mini sample #4 · C · 1536 dims C GPT 5.4 mini sample #5 · A · 1536 dims A GPT 5.4 mini sample #6 · A · 1536 dims A GPT 5.4 mini sample #7 · C · 1536 dims C Gemini 3 Flash Preview sample #0 · C · 1536 dims C Gemini 3 Flash Preview sample #1 · C · 1536 dims C Gemini 3 Flash Preview sample #2 · C · 1536 dims C Gemini 3 Flash Preview sample #3 · C · 1536 dims C Gemini 3 Flash Preview sample #4 · C · 1536 dims C Gemini 3 Flash Preview sample #5 · C · 1536 dims C Gemini 3 Flash Preview sample #6 · C · 1536 dims C Gemini 3 Flash Preview sample #7 · C · 1536 dims C
Claude Sonnet 5 GPT 5.4 mini Gemini 3 Flash Preview

Samples

Agent Responses

Claude Sonnet 5 openai_compatible · anthropic/claude-sonnet-5
#0 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

Given the fixed capex constraint this quarter, the highest-impact investment is retrofitting the existing fleet (VIP panels + PCM inserts) rather than buying new specialized vehicles, since it directly attacks the root cause—door-opening-induced temperature sp...

#1 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

Retrofitting existing vans with VIP insulation and PCM inserts directly targets the root cause—thermal loss from frequent door openings—without requiring new vehicle capital expenditure, fitting the fixed CapEx constraint. This approach maintains existing deli...

#2 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

Retrofitting with VIP panels and PCM inserts directly targets the root cause—temperature loss from frequent door openings—without requiring new capex-heavy vehicle purchases, fitting the fixed budget constraint. This passive cooling approach maintains payload ...

#3 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

Given the fixed capex budget constraint, retrofitting existing vans with VIP panels and PCM inserts (C) avoids major fleet capital expenditure while directly addressing spoilage through passive thermal isolation, reducing dependency on compressor cycling and d...

#4 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

Given the fixed capex constraint this quarter, a full fleet transition (A) is not feasible; retrofitting existing vans with passive VIP/PCM insulation directly targets the door-opening spoilage cause at low incremental cost, preserves the 2-hour window, and lo...

#5 E · Implement an AI-driven dynamic routing engine that prioritizes thermal-sensitive orders based on real-time ambient temperature and delivery density. 1536 dims

AI-driven dynamic routing (E) addresses the root cause—excessive transit time and door-opening frequency—without requiring major capex, fitting the fixed budget constraint. It directly reduces spoilage by minimizing exposure time and optimizing delivery densit...

#6 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

Retrofitting with VIP/PCM inserts (C) directly targets the root cause—door-opening-induced temperature swings and compressor strain—at low capital cost, fitting the fixed capex constraint while preserving existing van routes and 2-hour windows. It also cuts id...

#7 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

Retrofitting with VIP+PCM (C) directly attacks the root cause—door-opening-induced temperature loss—at low capex, fitting the fixed budget while preserving current routes, payloads, and 2-hour windows without added operational complexity. Alternatives either r...

GPT 5.4 mini openai_compatible · openai/gpt-5.4-mini
#0 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

The best option is the one that directly cuts spoilage, lowers emissions, and still fits the current quarter’s budget and 2-hour window. Retrofitting the existing fleet with vacuum insulation panels and phase-change material inserts can significantly improve t...

#1 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

The key constraints are a fixed capex budget this quarter and a need to cut spoilage quickly without adding much operational complexity. Retrofitting the existing fleet with VIP insulation and PCM inserts directly improves temperature retention, reduces depend...

#2 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

The best option is the one that directly reduces thermal exposure, cuts idling emissions, and can be rolled out within a fixed quarterly capital budget while preserving 2-hour delivery speed. Retrofitting the current fleet with VIP and PCM passive cooling inse...

#3 A · Phased transition to specialized tri-temperature modular electric light vehicles (eLCVs) with isolated compressor units. 1536 dims

The most direct way to cut spoilage below 3% while also lowering carbon intensity is to improve the vehicle platform itself, since the current vans fail from idling and frequent door openings. Option (A) best fits the constraints: modular electric light vehicl...

#4 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

The best choice is the one that most directly cuts spoilage while staying within a fixed budget and preserving 2-hour delivery windows. Retrofitting the current fleet with VIP and PCM passive cooling inserts is relatively low-capex, reduces temperature swings ...

#5 A · Phased transition to specialized tri-temperature modular electric light vehicles (eLCVs) with isolated compressor units. 1536 dims

The best option is the one that directly attacks spoilage, idling losses, and mechanical failures while still supporting 2-hour windows and lower carbon intensity. Specialized tri-temperature modular electric light vehicles with isolated compressor units are p...

#6 A · Phased transition to specialized tri-temperature modular electric light vehicles (eLCVs) with isolated compressor units. 1536 dims

The best option is the one that directly improves thermal control, reduces idling-related emissions, and keeps delivery speed intact without requiring a large immediate fleet replacement. A phased transition to specialized tri-temperature modular electric ligh...

#7 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

The main problem is thermal loss and mechanical failure in the current vans, so the best solution should directly improve insulation and cooling reliability while fitting the budget and keeping 2-hour windows. Retrofitting the existing fleet with VIP and PCM i...

Gemini 3 Flash Preview openai_compatible · google/gemini-3-flash-preview
#0 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

To achieve the target of reducing spoilage under 3% within a fixed capital expenditure budget, the service must prioritize efficiency over massive fleet replacement. Option (C) utilizes existing assets (the current fleet) while directly addressing the mechanic...

#1 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

The optimal solution is (C) because retrofitting the existing fleet with vacuum insulation panels (VIP) and phase-change material (PCM) inserts addresses the spoilage caused by door openings without requiring the high capital expenditure of a new fleet. This p...

#2 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

This problem requires hitting a specific spoilage target (<3%) while managing fixed capital constraints and reducing carbon intensity. Option (C) is the most viable because vacuum insulation panels (VIP) and phase-change materials (PCM) provide reliable passiv...

#3 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

To achieve the targeted spoilage reduction while adhering to a fixed capital expenditure budget, the service must address the mechanical failures caused by frequent door openings and engine idling. Option C provides a cost-effective solution by retrofitting th...

#4 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

This challenge requires reducing spoilage and carbon intensity within a fixed capital expenditure budget and 2-hour windows. Option (C) is the most viable because retrofitting the existing fleet with passive cooling (VIP and PCM) avoids the high capital outlay...

#5 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

The objective requires a solution that fits a fixed capital budget, addresses spoilage caused by frequent door openings, and manages idling costs. Option (C) provides a cost-effective alternative to vehicle replacement by utilizing passive cooling (PCM) and su...

#6 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

The most effective solution within a fixed capital expenditure budget is (C), as retrofitting the existing fleet avoids the massive upfront cost of a new vehicle fleet (A) or the long-term margin erosion of outsourcing (B). Passive cooling using Phase-Change M...

#7 C · Retrofit existing fleet with high-performance vacuum insulation panels (VIP) and reusable phase-change material (PCM) passive cooling inserts. 1536 dims

This challenge requires balancing a fixed capital expenditure budget, immediate spoilage reduction, and operational efficiency without increasing carbon intensity. Option (C) provides a cost-effective, passive cooling solution that eliminates mechanical failur...

Timings

Stages

Sampling4427 ms
Embedding553 ms
Signals11 ms
PPV0 ms

Errors

Agent and Round Errors

No errors recorded.