{
  "schema": "ARC013_LAB_CASES_v1",
  "cases": [
    {
      "case_id": "baseline",
      "workloads": [
        {
          "workload_id": "AI-CHAT",
          "business_value": "answer user requests",
          "work_unit": "request",
          "resource_plane": "AI inference",
          "arrival_pattern": "1000/day burst 2x",
          "concurrency": 20,
          "service_time": 4,
          "latency_target": "8s",
          "human_minutes": 0,
          "cost_driver": "tokens/calls",
          "failure_mode": "timeout/rate-limit",
          "queue_class": "interactive",
          "observability_signal": "requests,tokens,latency,retries",
          "evidence_ref": "SYN-AI",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 1000,
          "retry_rate": 0.0,
          "effective_daily_units": 1000
        },
        {
          "workload_id": "IMG-GEN",
          "business_value": "create product imagery",
          "work_unit": "image",
          "resource_plane": "GPU/media generation",
          "arrival_pattern": "180/day burst 3x",
          "concurrency": 8,
          "service_time": 18,
          "latency_target": "60s",
          "human_minutes": 0,
          "cost_driver": "GPU-seconds/generation",
          "failure_mode": "generation failure",
          "queue_class": "interactive-batch",
          "observability_signal": "images,gpu,retries,rejects",
          "evidence_ref": "SYN-IMG",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 180,
          "retry_rate": 0.0,
          "effective_daily_units": 180
        },
        {
          "workload_id": "VID-RENDER",
          "business_value": "produce short videos",
          "work_unit": "rendered_video_minute",
          "resource_plane": "media rendering",
          "arrival_pattern": "120 rendered-min/day burst 2.5x",
          "concurrency": 6,
          "service_time": 3,
          "latency_target": "15min/video",
          "human_minutes": 0,
          "cost_driver": "compute/storage",
          "failure_mode": "codec/render failure",
          "queue_class": "batch-priority",
          "observability_signal": "render-min,compute-min,queue-age,failures",
          "evidence_ref": "SYN-VID",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 120,
          "retry_rate": 0.0,
          "effective_daily_units": 120,
          "media_size_mb_per_unit": 250
        },
        {
          "workload_id": "HUM-REVIEW",
          "business_value": "editorial/risk review",
          "work_unit": "review_minute",
          "resource_plane": "human operations",
          "arrival_pattern": "360 review-min/day",
          "concurrency": 3,
          "service_time": 6,
          "latency_target": "4h backlog",
          "human_minutes": 360,
          "cost_driver": "reviewer minutes",
          "failure_mode": "backlog/quality reject",
          "queue_class": "human-review",
          "observability_signal": "review-min,backlog,rework",
          "evidence_ref": "SYN-HUM",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 360,
          "retry_rate": 0.0,
          "effective_daily_units": 360,
          "review_scope": "all"
        }
      ],
      "generic_job_collapse": false,
      "recompute_required": false,
      "recomputed": true,
      "requires_segmented_human_review": false,
      "human_review_segmented": false,
      "blocked_by_owner_policy": false
    },
    {
      "case_id": "generic_job_collapse",
      "workloads": [
        {
          "workload_id": "AI-CHAT",
          "business_value": "answer user requests",
          "work_unit": "job",
          "resource_plane": "AI inference",
          "arrival_pattern": "1000/day burst 2x",
          "concurrency": 20,
          "service_time": 4,
          "latency_target": "8s",
          "human_minutes": 0,
          "cost_driver": "tokens/calls",
          "failure_mode": "timeout/rate-limit",
          "queue_class": "interactive",
          "observability_signal": "requests,tokens,latency,retries",
          "evidence_ref": "SYN-AI",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 1000,
          "retry_rate": 0.0,
          "effective_daily_units": 1000
        },
        {
          "workload_id": "IMG-GEN",
          "business_value": "create product imagery",
          "work_unit": "job",
          "resource_plane": "GPU/media generation",
          "arrival_pattern": "180/day burst 3x",
          "concurrency": 8,
          "service_time": 18,
          "latency_target": "60s",
          "human_minutes": 0,
          "cost_driver": "GPU-seconds/generation",
          "failure_mode": "generation failure",
          "queue_class": "interactive-batch",
          "observability_signal": "images,gpu,retries,rejects",
          "evidence_ref": "SYN-IMG",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 180,
          "retry_rate": 0.0,
          "effective_daily_units": 180
        },
        {
          "workload_id": "VID-RENDER",
          "business_value": "produce short videos",
          "work_unit": "job",
          "resource_plane": "media rendering",
          "arrival_pattern": "120 rendered-min/day burst 2.5x",
          "concurrency": 6,
          "service_time": 3,
          "latency_target": "15min/video",
          "human_minutes": 0,
          "cost_driver": "compute/storage",
          "failure_mode": "codec/render failure",
          "queue_class": "batch-priority",
          "observability_signal": "render-min,compute-min,queue-age,failures",
          "evidence_ref": "SYN-VID",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 120,
          "retry_rate": 0.0,
          "effective_daily_units": 120,
          "media_size_mb_per_unit": 250
        },
        {
          "workload_id": "HUM-REVIEW",
          "business_value": "editorial/risk review",
          "work_unit": "job",
          "resource_plane": "human operations",
          "arrival_pattern": "360 review-min/day",
          "concurrency": 3,
          "service_time": 6,
          "latency_target": "4h backlog",
          "human_minutes": 360,
          "cost_driver": "reviewer minutes",
          "failure_mode": "backlog/quality reject",
          "queue_class": "human-review",
          "observability_signal": "review-min,backlog,rework",
          "evidence_ref": "SYN-HUM",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 360,
          "retry_rate": 0.0,
          "effective_daily_units": 360,
          "review_scope": "all"
        }
      ],
      "generic_job_collapse": true,
      "recompute_required": false,
      "recomputed": true,
      "requires_segmented_human_review": false,
      "human_review_segmented": false,
      "blocked_by_owner_policy": false
    },
    {
      "case_id": "media_duration_doubled_not_recomputed",
      "workloads": [
        {
          "workload_id": "AI-CHAT",
          "business_value": "answer user requests",
          "work_unit": "request",
          "resource_plane": "AI inference",
          "arrival_pattern": "1000/day burst 2x",
          "concurrency": 20,
          "service_time": 4,
          "latency_target": "8s",
          "human_minutes": 0,
          "cost_driver": "tokens/calls",
          "failure_mode": "timeout/rate-limit",
          "queue_class": "interactive",
          "observability_signal": "requests,tokens,latency,retries",
          "evidence_ref": "SYN-AI",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 1000,
          "retry_rate": 0.0,
          "effective_daily_units": 1000
        },
        {
          "workload_id": "IMG-GEN",
          "business_value": "create product imagery",
          "work_unit": "image",
          "resource_plane": "GPU/media generation",
          "arrival_pattern": "180/day burst 3x",
          "concurrency": 8,
          "service_time": 18,
          "latency_target": "60s",
          "human_minutes": 0,
          "cost_driver": "GPU-seconds/generation",
          "failure_mode": "generation failure",
          "queue_class": "interactive-batch",
          "observability_signal": "images,gpu,retries,rejects",
          "evidence_ref": "SYN-IMG",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 180,
          "retry_rate": 0.0,
          "effective_daily_units": 180
        },
        {
          "workload_id": "VID-RENDER",
          "business_value": "produce short videos",
          "work_unit": "rendered_video_minute",
          "resource_plane": "media rendering",
          "arrival_pattern": "120 videos/day (duration doubled but native demand not recalculated)",
          "concurrency": 6,
          "service_time": 3,
          "latency_target": "15min/video",
          "human_minutes": 0,
          "cost_driver": "compute/storage",
          "failure_mode": "codec/render failure",
          "queue_class": "batch-priority",
          "observability_signal": "render-min,compute-min,queue-age,failures",
          "evidence_ref": "SYN-VID",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 120,
          "retry_rate": 0.0,
          "effective_daily_units": 120,
          "media_size_mb_per_unit": 500
        },
        {
          "workload_id": "HUM-REVIEW",
          "business_value": "editorial/risk review",
          "work_unit": "review_minute",
          "resource_plane": "human operations",
          "arrival_pattern": "360 review-min/day",
          "concurrency": 3,
          "service_time": 6,
          "latency_target": "4h backlog",
          "human_minutes": 360,
          "cost_driver": "reviewer minutes",
          "failure_mode": "backlog/quality reject",
          "queue_class": "human-review",
          "observability_signal": "review-min,backlog,rework",
          "evidence_ref": "SYN-HUM",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 360,
          "retry_rate": 0.0,
          "effective_daily_units": 360,
          "review_scope": "all"
        }
      ],
      "generic_job_collapse": false,
      "recompute_required": true,
      "recomputed": false,
      "requires_segmented_human_review": false,
      "human_review_segmented": false,
      "blocked_by_owner_policy": false
    },
    {
      "case_id": "missing_observability",
      "workloads": [
        {
          "workload_id": "AI-CHAT",
          "business_value": "answer user requests",
          "work_unit": "request",
          "resource_plane": "AI inference",
          "arrival_pattern": "1000/day burst 2x",
          "concurrency": 20,
          "service_time": 4,
          "latency_target": "8s",
          "human_minutes": 0,
          "cost_driver": "tokens/calls",
          "failure_mode": "timeout/rate-limit",
          "queue_class": "interactive",
          "observability_signal": "requests,tokens,latency,retries",
          "evidence_ref": "SYN-AI",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 1000,
          "retry_rate": 0.0,
          "effective_daily_units": 1000
        },
        {
          "workload_id": "IMG-GEN",
          "business_value": "create product imagery",
          "work_unit": "image",
          "resource_plane": "GPU/media generation",
          "arrival_pattern": "180/day burst 3x",
          "concurrency": 8,
          "service_time": 18,
          "latency_target": "60s",
          "human_minutes": 0,
          "cost_driver": "GPU-seconds/generation",
          "failure_mode": "generation failure",
          "queue_class": "interactive-batch",
          "observability_signal": "",
          "evidence_ref": "SYN-IMG",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 180,
          "retry_rate": 0.0,
          "effective_daily_units": 180
        },
        {
          "workload_id": "VID-RENDER",
          "business_value": "produce short videos",
          "work_unit": "rendered_video_minute",
          "resource_plane": "media rendering",
          "arrival_pattern": "120 rendered-min/day burst 2.5x",
          "concurrency": 6,
          "service_time": 3,
          "latency_target": "15min/video",
          "human_minutes": 0,
          "cost_driver": "compute/storage",
          "failure_mode": "codec/render failure",
          "queue_class": "batch-priority",
          "observability_signal": "render-min,compute-min,queue-age,failures",
          "evidence_ref": "SYN-VID",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 120,
          "retry_rate": 0.0,
          "effective_daily_units": 120,
          "media_size_mb_per_unit": 250
        },
        {
          "workload_id": "HUM-REVIEW",
          "business_value": "editorial/risk review",
          "work_unit": "review_minute",
          "resource_plane": "human operations",
          "arrival_pattern": "360 review-min/day",
          "concurrency": 3,
          "service_time": 6,
          "latency_target": "4h backlog",
          "human_minutes": 360,
          "cost_driver": "reviewer minutes",
          "failure_mode": "backlog/quality reject",
          "queue_class": "human-review",
          "observability_signal": "review-min,backlog,rework",
          "evidence_ref": "SYN-HUM",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 360,
          "retry_rate": 0.0,
          "effective_daily_units": 360,
          "review_scope": "all"
        }
      ],
      "generic_job_collapse": false,
      "recompute_required": false,
      "recomputed": true,
      "requires_segmented_human_review": false,
      "human_review_segmented": false,
      "blocked_by_owner_policy": false
    },
    {
      "case_id": "burst_increase_recomputed",
      "workloads": [
        {
          "workload_id": "AI-CHAT",
          "business_value": "answer user requests",
          "work_unit": "request",
          "resource_plane": "AI inference",
          "arrival_pattern": "1000/day burst 4x",
          "concurrency": 40,
          "service_time": 4,
          "latency_target": "8s",
          "human_minutes": 0,
          "cost_driver": "tokens/calls",
          "failure_mode": "timeout/rate-limit",
          "queue_class": "interactive",
          "observability_signal": "requests,tokens,latency,retries",
          "evidence_ref": "SYN-AI",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 1000,
          "retry_rate": 0.0,
          "effective_daily_units": 1000
        },
        {
          "workload_id": "IMG-GEN",
          "business_value": "create product imagery",
          "work_unit": "image",
          "resource_plane": "GPU/media generation",
          "arrival_pattern": "180/day burst 3x",
          "concurrency": 8,
          "service_time": 18,
          "latency_target": "60s",
          "human_minutes": 0,
          "cost_driver": "GPU-seconds/generation",
          "failure_mode": "generation failure",
          "queue_class": "interactive-batch",
          "observability_signal": "images,gpu,retries,rejects",
          "evidence_ref": "SYN-IMG",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 180,
          "retry_rate": 0.0,
          "effective_daily_units": 180
        },
        {
          "workload_id": "VID-RENDER",
          "business_value": "produce short videos",
          "work_unit": "rendered_video_minute",
          "resource_plane": "media rendering",
          "arrival_pattern": "120 rendered-min/day burst 2.5x",
          "concurrency": 6,
          "service_time": 3,
          "latency_target": "15min/video",
          "human_minutes": 0,
          "cost_driver": "compute/storage",
          "failure_mode": "codec/render failure",
          "queue_class": "batch-priority",
          "observability_signal": "render-min,compute-min,queue-age,failures",
          "evidence_ref": "SYN-VID",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 120,
          "retry_rate": 0.0,
          "effective_daily_units": 120,
          "media_size_mb_per_unit": 250
        },
        {
          "workload_id": "HUM-REVIEW",
          "business_value": "editorial/risk review",
          "work_unit": "review_minute",
          "resource_plane": "human operations",
          "arrival_pattern": "360 review-min/day",
          "concurrency": 3,
          "service_time": 6,
          "latency_target": "4h backlog",
          "human_minutes": 360,
          "cost_driver": "reviewer minutes",
          "failure_mode": "backlog/quality reject",
          "queue_class": "human-review",
          "observability_signal": "review-min,backlog,rework",
          "evidence_ref": "SYN-HUM",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 360,
          "retry_rate": 0.0,
          "effective_daily_units": 360,
          "review_scope": "all"
        }
      ],
      "generic_job_collapse": false,
      "recompute_required": true,
      "recomputed": true,
      "requires_segmented_human_review": false,
      "human_review_segmented": false,
      "blocked_by_owner_policy": false
    },
    {
      "case_id": "retry_amplification_hidden",
      "workloads": [
        {
          "workload_id": "AI-CHAT",
          "business_value": "answer user requests",
          "work_unit": "request",
          "resource_plane": "AI inference",
          "arrival_pattern": "1000/day burst 2x",
          "concurrency": 20,
          "service_time": 4,
          "latency_target": "8s",
          "human_minutes": 0,
          "cost_driver": "tokens/calls",
          "failure_mode": "timeout/rate-limit",
          "queue_class": "interactive",
          "observability_signal": "requests,tokens,latency,retries",
          "evidence_ref": "SYN-AI",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 1000,
          "retry_rate": 0.2,
          "effective_daily_units": 1000
        },
        {
          "workload_id": "IMG-GEN",
          "business_value": "create product imagery",
          "work_unit": "image",
          "resource_plane": "GPU/media generation",
          "arrival_pattern": "180/day burst 3x",
          "concurrency": 8,
          "service_time": 18,
          "latency_target": "60s",
          "human_minutes": 0,
          "cost_driver": "GPU-seconds/generation",
          "failure_mode": "generation failure",
          "queue_class": "interactive-batch",
          "observability_signal": "images,gpu,retries,rejects",
          "evidence_ref": "SYN-IMG",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 180,
          "retry_rate": 0.0,
          "effective_daily_units": 180
        },
        {
          "workload_id": "VID-RENDER",
          "business_value": "produce short videos",
          "work_unit": "rendered_video_minute",
          "resource_plane": "media rendering",
          "arrival_pattern": "120 rendered-min/day burst 2.5x",
          "concurrency": 6,
          "service_time": 3,
          "latency_target": "15min/video",
          "human_minutes": 0,
          "cost_driver": "compute/storage",
          "failure_mode": "codec/render failure",
          "queue_class": "batch-priority",
          "observability_signal": "render-min,compute-min,queue-age,failures",
          "evidence_ref": "SYN-VID",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 120,
          "retry_rate": 0.0,
          "effective_daily_units": 120,
          "media_size_mb_per_unit": 250
        },
        {
          "workload_id": "HUM-REVIEW",
          "business_value": "editorial/risk review",
          "work_unit": "review_minute",
          "resource_plane": "human operations",
          "arrival_pattern": "360 review-min/day",
          "concurrency": 3,
          "service_time": 6,
          "latency_target": "4h backlog",
          "human_minutes": 360,
          "cost_driver": "reviewer minutes",
          "failure_mode": "backlog/quality reject",
          "queue_class": "human-review",
          "observability_signal": "review-min,backlog,rework",
          "evidence_ref": "SYN-HUM",
          "evidence_age_days": 3,
          "max_evidence_age_days": 30,
          "daily_native_units": 360,
          "retry_rate": 0.0,
          "effective_daily_units": 360,
          "review_scope": "all"
        }
      ],
      "generic_job_collapse": false,
      "recompute_required": false,
      "recomputed": true,
      "requires_segmented_human_review": false,
      "human_review_segmented": false,
      "blocked_by_owner_policy": false
    },
    {
      "case_id": "stale_evidence",
      "workloads": [
        {
          "workload_id": "AI-CHAT",
          "business_value": "answer user requests",
          "work_unit": "request",
          "resource_plane": "AI inference",
          "arrival_pattern": "1000/day burst 2x",
          "concurrency": 20,
          "service_time": 4,
          "latency_target": "8s",
          "human_minutes": 0,
          "cost_driver": "tokens/calls",
          "failure_mode": "timeout/rate-limit",
          "queue_class": "interactive",
          "observability_signal": "requests,tokens,latency,retries",
          "evidence_ref": "SYN-AI",
          "evidence_age_days": 45,
          "max_evidence_age_days": 30,
          "daily_native_units": 1000,
          "retry_rate": 0.0,
          "effective_daily_units": 1000
        },
        {
          "workload_id": "IMG-GEN",
          "business_value": "create product imagery",
          "work_unit": "image",
          "resource_plane": "GPU/media generation",
          "arrival_pattern": "180/day burst 3x",
          "concurrency": 8,
          "service_time": 18,
          "latency_target": "60s",
          "human_minutes": 0,
          "cost_driver": "GPU-seconds/generation",
          "failure_mode": "generation failure",
          "queue_class": "interactive-batch",
          "observability_signal": "images,gpu,retries,rejects",
          "evidence_ref": "SYN-IMG",
          "evidence_age_days": 45,
          "max_evidence_age_days": 30,
          "daily_native_units": 180,
          "retry_rate": 0.0,
          "effective_daily_units": 180
        },
        {
          "workload_id": "VID-RENDER",
          "business_value": "produce short videos",
          "work_unit": "rendered_video_minute",
          "resource_plane": "media rendering",
          "arrival_pattern": "120 rendered-min/day burst 2.5x",
          "concurrency": 6,
          "service_time": 3,
          "latency_target": "15min/video",
          "human_minutes": 0,
          "cost_driver": "compute/storage",
          "failure_mode": "codec/render failure",
          "queue_class": "batch-priority",
          "observability_signal": "render-min,compute-min,queue-age,failures",
          "evidence_ref": "SYN-VID",
          "evidence_age_days": 45,
          "max_evidence_age_days": 30,
          "daily_native_units": 120,
          "retry_rate": 0.0,
          "effective_daily_units": 120,
          "media_size_mb_per_unit": 250
        },
        {
          "workload_id": "HUM-REVIEW",
          "business_value": "editorial/risk review",
          "work_unit": "review_minute",
          "resource_plane": "human operations",
          "arrival_pattern": "360 review-min/day",
          "concurrency": 3,
          "service_time": 6,
          "latency_target": "4h backlog",
          "human_minutes": 360,
          "cost_driver": "reviewer minutes",
          "failure_mode": "backlog/quality reject",
          "queue_class": "human-review",
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}