MATIH Platform is in active MVP development. Documentation reflects current implementation status.
21. Industry Examples & Walkthroughs
Healthcare & Life Sciences
BI Lead Journey

BI Lead Journey: Hospital Operations Command Center

Persona: Aisha Williams, BI Lead at Pinnacle Health System Goal: Build a real-time operations analytics platform for 12 hospitals, enabling data-driven decision-making from the bedside to the boardroom Primary Workbenches: BI Workbench, Semantic Layer


Background

Pinnacle Health operates 12 acute care hospitals with 3,200 licensed beds across a metropolitan region. Each hospital has its own operational rhythm, but system leadership needs a unified view to manage capacity, quality, and financial performance. Today, operational data lives in disconnected silos -- bed census in the EHR, staffing in Kronos, supply chain in Lawson, patient satisfaction in Press Ganey, and financials in the GL system. Department managers wait 48 hours for reports. The operations center relies on whiteboards and phone calls.

Aisha Williams has been tasked with building a hospital operations command center -- a suite of dashboards running on wall-mounted displays in each hospital's operations center, updated every hour, with real-time alerts for critical thresholds.


Stage 1: Ingestion

Aisha begins by connecting the operational data sources through the Data Workbench ingestion panel.

Data Source Connections

SourceSystemConnectorSync FrequencyKey Data
Bed CensusEpic/Cerner (ADT feeds)Airbyte FHIR + HL7v2Every 15 minReal-time census, admits, discharges, transfers
StaffingKronos WorkforceAirbyte PostgreSQLEvery 30 minScheduled staff, actual staff, overtime, agency usage
Supply ChainLawson ERPAirbyte Oracle DBHourlyInventory levels, orders, consumption, costs
Patient SatisfactionPress GaneyAirbyte HTTP APIDailyHCAHPS scores, comments, response rates
Financial SystemsWorkday GLAirbyte WorkdayDailyRevenue, expenses, AR, AP, budget vs actual
Quality MetricsEHR + ClaimsAirbyte (multi-source)DailyMortality, infections, readmissions, falls
ED Track BoardEpic OpTimeAirbyte FHIREvery 5 minED arrivals, triage, boarding, disposition

ADT Feed Configuration for Real-Time Census

{
  "source_type": "hl7v2_listener",
  "connection_name": "pinnacle_adt_feeds",
  "config": {
    "listen_port": 2575,
    "message_types": ["ADT^A01", "ADT^A02", "ADT^A03", "ADT^A04", "ADT^A06", "ADT^A07", "ADT^A08"],
    "facilities": [
      {"facility_id": "PDT", "name": "Pinnacle Downtown", "beds": 480},
      {"facility_id": "PEA", "name": "Pinnacle East", "beds": 320},
      {"facility_id": "PME", "name": "Pinnacle Memorial", "beds": 290},
      {"facility_id": "PCM", "name": "Pinnacle Community", "beds": 185}
    ],
    "parsing": {
      "patient_class": "PV1-2",
      "admit_date": "PV1-44",
      "discharge_date": "PV1-45",
      "unit": "PV1-3.1",
      "bed": "PV1-3.3",
      "attending_physician": "PV1-7"
    }
  },
  "destination": {
    "schema": "operations_realtime",
    "table": "adt_events"
  }
}

Stage 2: Discovery

Aisha explores the operational data in the Data Workbench Catalog to understand data quality and standardization requirements.

Department Naming Standardization

Aisha discovers that department names are inconsistent across the 12 hospitals:

Department Naming Inconsistencies Across 12 Hospitals
======================================================

"Medical/Surgical" appears as:
  - Med/Surg        (4 hospitals)
  - Medical-Surgical (3 hospitals)
  - Med Surg         (2 hospitals)
  - MedSurg          (2 hospitals)
  - M/S              (1 hospital)

"Emergency Department" appears as:
  - Emergency Department  (5 hospitals)
  - Emergency Room        (3 hospitals)
  - ED                    (2 hospitals)
  - ER                    (2 hospitals)

Total unique department names found: 287
After standardization mapping:       64 standard departments

Resolution: Built standardization mapping in the catalog
  - 287 source names → 64 standard names
  - Mapping stored in reference.department_standardization
  - Applied automatically in the semantic layer

Bed Census Data Profiling

-- Profile bed census data for completeness and accuracy
SELECT
    facility_id,
    COUNT(*) AS total_events,
    COUNT(DISTINCT unit) AS units_reporting,
    SUM(CASE WHEN event_type = 'ADMIT' THEN 1 ELSE 0 END) AS admits,
    SUM(CASE WHEN event_type = 'DISCHARGE' THEN 1 ELSE 0 END) AS discharges,
    SUM(CASE WHEN event_type = 'TRANSFER' THEN 1 ELSE 0 END) AS transfers,
    SUM(CASE WHEN unit IS NULL THEN 1 ELSE 0 END) AS missing_unit,
    SUM(CASE WHEN bed IS NULL THEN 1 ELSE 0 END) AS missing_bed
FROM operations_realtime.adt_events
WHERE event_date = CURRENT_DATE
GROUP BY facility_id;
FacilityEventsUnitsAdmitsDischargesTransfersMissing UnitMissing Bed
PDT1,24728412389446318
PEA8341927626429407
PME712172382292451224
PCM4231114113814402

Stage 3: Query

Aisha defines the semantic metrics that power the command center dashboards using the Semantic Layer in the BI Workbench.

Semantic Layer Metric Definitions

-- Semantic Layer: Core operational metrics
-- These definitions ensure consistent computation across all dashboards
 
-- Metric: Bed Occupancy Rate
-- CMS-aligned: occupied bed-days / available bed-days
CREATE VIEW semantic.bed_occupancy AS
SELECT
    facility_id,
    unit_standard_name,
    snapshot_hour,
    occupied_beds,
    licensed_beds,
    ROUND(100.0 * occupied_beds / NULLIF(licensed_beds, 0), 1) AS occupancy_pct,
    CASE
        WHEN occupied_beds / NULLIF(licensed_beds, 0) > 0.95 THEN 'CRITICAL'
        WHEN occupied_beds / NULLIF(licensed_beds, 0) > 0.88 THEN 'HIGH'
        WHEN occupied_beds / NULLIF(licensed_beds, 0) > 0.75 THEN 'NORMAL'
        ELSE 'LOW'
    END AS occupancy_status
FROM operations.hourly_bed_census;
 
-- Metric: ED Wait Time (Door-to-Provider)
-- CMS ED-1 measure alignment
CREATE VIEW semantic.ed_wait_time AS
SELECT
    facility_id,
    DATE_TRUNC('hour', arrival_time) AS hour,
    COUNT(*) AS ed_visits,
    ROUND(AVG(EXTRACT(EPOCH FROM (provider_time - arrival_time)) / 60.0), 0)
        AS avg_wait_minutes,
    ROUND(PERCENTILE_CONT(0.5) WITHIN GROUP
        (ORDER BY EXTRACT(EPOCH FROM (provider_time - arrival_time)) / 60.0), 0)
        AS median_wait_minutes,
    ROUND(PERCENTILE_CONT(0.9) WITHIN GROUP
        (ORDER BY EXTRACT(EPOCH FROM (provider_time - arrival_time)) / 60.0), 0)
        AS p90_wait_minutes,
    SUM(CASE WHEN EXTRACT(EPOCH FROM (provider_time - arrival_time)) / 60.0 > 240
        THEN 1 ELSE 0 END) AS over_4_hours
FROM operations.ed_tracking
GROUP BY facility_id, DATE_TRUNC('hour', arrival_time);
 
-- Metric: Staffing Ratio (Nurse-to-Patient)
CREATE VIEW semantic.staffing_ratio AS
SELECT
    s.facility_id,
    s.unit_standard_name,
    s.shift_date,
    s.shift_type,
    s.scheduled_rn_count,
    s.actual_rn_count,
    c.occupied_beds AS patient_count,
    ROUND(c.occupied_beds / NULLIF(s.actual_rn_count, 0), 1) AS patients_per_nurse,
    CASE
        WHEN s.unit_type = 'ICU' AND c.occupied_beds / NULLIF(s.actual_rn_count, 0) > 2.0
            THEN 'UNSAFE'
        WHEN s.unit_type = 'MED_SURG' AND c.occupied_beds / NULLIF(s.actual_rn_count, 0) > 6.0
            THEN 'UNSAFE'
        WHEN s.unit_type = 'ED' AND c.occupied_beds / NULLIF(s.actual_rn_count, 0) > 4.0
            THEN 'UNSAFE'
        ELSE 'SAFE'
    END AS staffing_status
FROM operations.staffing_actuals s
JOIN operations.shift_census c
    ON s.facility_id = c.facility_id
    AND s.unit_standard_name = c.unit_standard_name
    AND s.shift_date = c.shift_date
    AND s.shift_type = c.shift_type;

CMS Metric Validation

Aisha validates her computed metrics against the manually reported CMS values:

-- Validate platform-computed metrics against CMS-reported values
SELECT
    m.facility_id,
    m.measure_id,
    m.measure_name,
    m.cms_reported_value,
    m.platform_computed_value,
    ROUND(ABS(m.cms_reported_value - m.platform_computed_value), 2) AS absolute_diff,
    ROUND(100.0 * ABS(m.cms_reported_value - m.platform_computed_value)
        / NULLIF(m.cms_reported_value, 0), 2) AS pct_diff,
    CASE WHEN ABS(m.cms_reported_value - m.platform_computed_value)
        / NULLIF(m.cms_reported_value, 0) <= 0.01 THEN 'PASS'
        ELSE 'REVIEW'
    END AS validation_status
FROM quality.metric_validation m
WHERE m.reporting_period = '2025-Q3';
FacilityMeasureCMS ReportedPlatformDiffStatus
PDTReadmission (AMI)15.2%15.1%0.1%PASS
PDTReadmission (HF)21.8%21.6%0.2%PASS
PEAMortality (CABG)2.4%2.5%0.1%PASS
PMEED Wait (median)38 min37 min2.6%PASS
SystemHCAHPS Overall72.072.30.4%PASS

Stage 4: Orchestration

Aisha builds the operational data pipelines through the Pipeline Service.

Hourly Operations Pipeline

{
  "pipeline_name": "operations_command_center",
  "schedule": "0 * * * *",
  "description": "Hourly operational data refresh for command center dashboards",
  "steps": [
    {
      "step_id": "compute_hourly_census",
      "type": "sql_transform",
      "query_ref": "sql/hourly_bed_census.sql",
      "destination": "operations.hourly_bed_census",
      "write_mode": "upsert",
      "upsert_keys": ["facility_id", "unit_standard_name", "snapshot_hour"]
    },
    {
      "step_id": "compute_ed_metrics",
      "type": "sql_transform",
      "query_ref": "sql/ed_flow_metrics.sql",
      "destination": "operations.ed_flow_hourly",
      "write_mode": "upsert",
      "upsert_keys": ["facility_id", "hour"]
    },
    {
      "step_id": "compute_staffing_metrics",
      "type": "sql_transform",
      "depends_on": ["compute_hourly_census"],
      "query_ref": "sql/staffing_ratios.sql",
      "destination": "operations.staffing_metrics",
      "write_mode": "upsert",
      "upsert_keys": ["facility_id", "unit_standard_name", "shift_date", "shift_type"]
    },
    {
      "step_id": "quality_checks",
      "type": "data_quality",
      "depends_on": ["compute_hourly_census", "compute_ed_metrics", "compute_staffing_metrics"],
      "suite": "operations_quality",
      "checks": [
        { "type": "freshness", "table": "hourly_bed_census", "max_age_minutes": 90 },
        { "type": "range", "column": "occupancy_pct", "min": 0, "max": 100 },
        { "type": "range", "column": "patients_per_nurse", "min": 0, "max": 20 },
        { "type": "completeness", "table": "ed_flow_hourly", "min_facilities": 12 }
      ],
      "on_failure": "alert_and_continue"
    },
    {
      "step_id": "midnight_census_snapshot",
      "type": "sql_transform",
      "condition": "HOUR(NOW()) = 0",
      "query_ref": "sql/midnight_census_snapshot.sql",
      "destination": "operations.daily_midnight_census",
      "write_mode": "append",
      "description": "Official midnight census for regulatory reporting"
    },
    {
      "step_id": "refresh_dashboard_cache",
      "type": "cache_invalidation",
      "depends_on": ["quality_checks"],
      "dashboards": [
        "ops_realtime_census",
        "ops_ed_flow",
        "ops_staffing",
        "ops_quality_summary"
      ]
    }
  ]
}

Midnight Census Special Handling

-- Midnight census snapshot -- official daily count for CMS reporting
-- Must run at exactly 00:00 local time for each facility's timezone
INSERT INTO operations.daily_midnight_census
SELECT
    facility_id,
    CURRENT_DATE AS census_date,
    unit_standard_name,
    service_line,
    COUNT(*) AS patient_count,
    SUM(CASE WHEN patient_class = 'OBS' THEN 1 ELSE 0 END) AS observation_count,
    SUM(CASE WHEN patient_class = 'INP' THEN 1 ELSE 0 END) AS inpatient_count,
    SUM(CASE WHEN los_days > 14 THEN 1 ELSE 0 END) AS long_stay_count,
    SUM(CASE WHEN isolation_flag = TRUE THEN 1 ELSE 0 END) AS isolation_count
FROM operations.current_census
WHERE snapshot_time = DATE_TRUNC('day', CURRENT_TIMESTAMP)
GROUP BY facility_id, unit_standard_name, service_line;

Stage 5: Analysis

Aisha validates the operations data and identifies patterns before building dashboards.

Seasonal Pattern Analysis

-- Identify seasonal patterns for capacity planning
SELECT
    EXTRACT(MONTH FROM census_date) AS month,
    facility_id,
    ROUND(AVG(occupancy_pct), 1) AS avg_occupancy,
    ROUND(MAX(occupancy_pct), 1) AS peak_occupancy,
    COUNT(CASE WHEN occupancy_pct > 95 THEN 1 END) AS crisis_days,
    ROUND(AVG(ed_boarding_hours), 1) AS avg_boarding_hours
FROM operations.daily_summary
WHERE census_date >= CURRENT_DATE - INTERVAL '2' YEAR
GROUP BY EXTRACT(MONTH FROM census_date), facility_id
ORDER BY month;
MonthAvg OccupancyPeak OccupancyCrisis DaysAvg ED Boarding
Jan84.2%97.8%125.1 hrs
Feb82.8%96.1%84.8 hrs
Mar79.4%92.3%33.6 hrs
Jul72.1%88.5%02.4 hrs
Oct76.8%91.2%13.1 hrs
Nov80.6%94.7%54.2 hrs
Dec83.9%98.2%145.4 hrs

Data Quality Issue Identification

Aisha profiles data quality across the 12 hospitals:

HospitalCensus CompletenessStaffing Data LagADT Feed ReliabilityIssues
Pinnacle Downtown99.8%< 5 min99.9%None
Pinnacle East99.2%< 5 min99.7%None
Pinnacle Memorial94.1%2 hours97.8%Cerner ADT interface delays
Pinnacle South98.7%< 5 min99.4%None
Pinnacle Rural88.3%4 hours93.2%Manual entry, connectivity issues

Stage 6: Productionization

Aisha builds and deploys the command center dashboard suite through the BI Workbench.

Dashboard Suite Architecture

Operations Command Center -- Dashboard Suite
==============================================

  ┌─────────────────────────────────────────────────────────────────┐
  │                    WALL-MOUNTED DISPLAYS                       │
  │  ┌──────────────┐  ┌──────────────┐  ┌──────────────────────┐  │
  │  │ Real-Time    │  │  ED Flow     │  │  System Overview     │  │
  │  │ Bed Census   │  │  Board       │  │  (12-hospital map)   │  │
  │  │              │  │              │  │                      │  │
  │  │ By unit,     │  │ Arrivals,    │  │ Occupancy heat map,  │  │
  │  │ bed-level    │  │ wait times,  │  │ diversion status,    │  │
  │  │ status       │  │ boarding     │  │ key alerts           │  │
  │  └──────────────┘  └──────────────┘  └──────────────────────┘  │
  │                                                                 │
  │  ┌──────────────┐  ┌──────────────┐  ┌──────────────────────┐  │
  │  │ OR Schedule  │  │  Staffing    │  │  Quality Metrics     │  │
  │  │ & Utilization│  │  Dashboard   │  │  Scorecard           │  │
  │  │              │  │              │  │                      │  │
  │  │ Room status, │  │ RN ratios,   │  │ Readmissions,        │  │
  │  │ case times,  │  │ agency use,  │  │ infections,          │  │
  │  │ turnover     │  │ overtime     │  │ mortality, falls     │  │
  │  └──────────────┘  └──────────────┘  └──────────────────────┘  │
  └─────────────────────────────────────────────────────────────────┘

  ┌─────────────────────────────────────────────────────────────────┐
  │                    EXECUTIVE DASHBOARDS                        │
  │  ┌──────────────────────────┐  ┌────────────────────────────┐  │
  │  │ Financial Performance   │  │  CMS Star Rating Tracker   │  │
  │  │                         │  │                            │  │
  │  │ Revenue, expenses,      │  │  Current rating, projected │  │
  │  │ margin by service line, │  │  rating, improvement areas │  │
  │  │ budget variance         │  │                            │  │
  │  └──────────────────────────┘  └────────────────────────────┘  │
  └─────────────────────────────────────────────────────────────────┘

Dashboard Configuration

{
  "dashboard_suite": "pinnacle_ops_command_center",
  "dashboards": [
    {
      "id": "ops_realtime_census",
      "title": "Real-Time Bed Census",
      "refresh_interval_seconds": 300,
      "display_mode": "wall_mounted",
      "panels": [
        {
          "title": "System Occupancy",
          "type": "gauge",
          "metric": "semantic.bed_occupancy",
          "aggregation": "system_average",
          "thresholds": { "green": 75, "yellow": 88, "red": 95 }
        },
        {
          "title": "Occupancy by Facility",
          "type": "heatmap",
          "metric": "semantic.bed_occupancy",
          "group_by": "facility_id",
          "color_scale": "green_yellow_red"
        },
        {
          "title": "Available Beds by Unit Type",
          "type": "stacked_bar",
          "metric": "semantic.bed_availability",
          "group_by": ["facility_id", "unit_type"]
        }
      ]
    },
    {
      "id": "ops_ed_flow",
      "title": "Emergency Department Flow",
      "refresh_interval_seconds": 300,
      "panels": [
        {
          "title": "Door-to-Provider Time",
          "type": "line_chart",
          "metric": "semantic.ed_wait_time",
          "fields": ["median_wait_minutes", "p90_wait_minutes"],
          "threshold_line": 240
        },
        {
          "title": "ED Boarding Count",
          "type": "big_number",
          "metric": "SELECT COUNT(*) FROM operations.ed_tracking WHERE status = 'BOARDING'",
          "alert_threshold": 15
        },
        {
          "title": "Patients by Acuity (ESI)",
          "type": "donut_chart",
          "metric": "semantic.ed_acuity_distribution"
        }
      ]
    },
    {
      "id": "ops_staffing",
      "title": "Staffing Dashboard",
      "refresh_interval_seconds": 900,
      "panels": [
        {
          "title": "Nurse-to-Patient Ratios",
          "type": "table",
          "metric": "semantic.staffing_ratio",
          "highlight_rule": "staffing_status = 'UNSAFE'",
          "highlight_color": "red"
        },
        {
          "title": "Agency Staff Usage",
          "type": "bar_chart",
          "metric": "semantic.agency_utilization",
          "group_by": "facility_id"
        }
      ]
    }
  ]
}

Stage 7: Feedback

Aisha configures real-time alerts and daily quality reports.

Alert Configuration

{
  "alert_suite": "ops_command_center_alerts",
  "alerts": [
    {
      "name": "ed_wait_critical",
      "description": "ED wait time exceeds 4 hours",
      "condition": "semantic.ed_wait_time.p90_wait_minutes > 240",
      "check_interval_minutes": 15,
      "severity": "critical",
      "channels": ["ops_center_display", "sms"],
      "recipients": ["ed_director", "cno", "ops_center"],
      "escalation": {
        "if_not_acknowledged_minutes": 30,
        "escalate_to": ["cmo", "coo"]
      }
    },
    {
      "name": "bed_occupancy_critical",
      "description": "Facility bed occupancy exceeds 95%",
      "condition": "semantic.bed_occupancy.occupancy_pct > 95",
      "check_interval_minutes": 15,
      "severity": "critical",
      "channels": ["ops_center_display", "sms", "email"],
      "recipients": ["bed_management", "cno", "ops_center"],
      "auto_action": "trigger_surge_protocol_review"
    },
    {
      "name": "staffing_unsafe",
      "description": "Nurse-to-patient ratio exceeds safe threshold",
      "condition": "semantic.staffing_ratio.staffing_status = 'UNSAFE'",
      "check_interval_minutes": 30,
      "severity": "high",
      "channels": ["email", "ehr_inbox"],
      "recipients": ["unit_manager", "staffing_office", "cno"]
    },
    {
      "name": "data_freshness",
      "description": "Operations data older than 90 minutes",
      "condition": "operations.hourly_bed_census.max_snapshot_age_minutes > 90",
      "check_interval_minutes": 30,
      "severity": "medium",
      "channels": ["email"],
      "recipients": ["aisha.williams@pinnaclehealth.org", "data_ops"]
    }
  ]
}

Daily Data Quality Report

Operations Data Quality Report -- November 15, 2025
=====================================================

Data Source Freshness:
  ADT Feeds (Epic):       2 min old     OK
  ADT Feeds (Cerner):     4 min old     OK
  Staffing (Kronos):      12 min old    OK
  ED Tracking:            3 min old     OK
  Financial (Workday):    18 hours old  OK (daily sync)

Data Completeness:
  Facilities reporting:   12/12         OK
  Units with census data: 186/192       WARNING (6 units missing)
  Staffing data complete: 11/12         WARNING (Pinnacle Rural delayed)

Metric Accuracy (vs manual audit):
  Bed census:             99.4% match   OK
  ED wait time:           98.8% match   OK
  Staffing ratios:        97.2% match   OK (rounding differences)

Action Items:
  1. Investigate 6 units missing census data (Pinnacle Memorial OB units)
  2. Follow up on Pinnacle Rural staffing data delay
  3. Schedule quarterly metric accuracy audit for Q1 2026

Stage 8: Experimentation

Aisha pilots new analytics capabilities and measures operational impact.

Predictive Bed Management Pilot

Aisha pilots a predictive bed management dashboard at 3 hospitals:

Predictive Bed Management -- Pilot Results
============================================

Pilot sites: Pinnacle Downtown, Pinnacle East, Pinnacle Memorial
Period: October 2025 (4 weeks)
Model: 24-hour census forecast using admission patterns, OR schedule,
       and historical discharge timing

Accuracy:
  4-hour forecast:   +/- 3 beds (95% CI)
  12-hour forecast:  +/- 7 beds (95% CI)
  24-hour forecast:  +/- 12 beds (95% CI)

Operational Impact (pilot vs control hospitals):
  ED boarding time:    3.1 hours (pilot) vs 4.4 hours (control)    -30%
  Diversion hours:     8 hours/month (pilot) vs 22 hours (control)  -64%
  Bed turnaround time: 42 min (pilot) vs 58 min (control)          -28%

Decision: Expand to all 12 hospitals in Q1 2026

Self-Service Analytics for Department Managers

Aisha tests giving department managers direct access to filtered dashboards:

Self-Service Analytics Pilot -- 8 Department Managers
======================================================

Access provided: Filtered views of command center dashboards
  - Each manager sees only their department's data
  - Pre-built drill-down paths (occupancy → unit → patient class)
  - Natural language query for ad-hoc questions

Adoption (4-week pilot):
  Managers with daily login:         6/8  (75%)
  Ad-hoc queries submitted:         142
  Reports previously requested:     34 (now self-served)
  Time saved (estimated):           18 analyst-hours/week

Top self-service queries:
  1. "Show me overtime hours by unit for last 2 weeks"
  2. "Compare my unit's length of stay to system average"
  3. "Which days had the highest admits this month?"
  4. "What is my patient satisfaction trend vs last quarter?"

Decision: Roll out to all department managers with training program

ED Boarding Time Impact

Command Center Impact on ED Boarding -- 6-Month Assessment
============================================================

                        Pre-Dashboard    Post-Dashboard    Change
Mean boarding time:       4.2 hours        3.1 hours       -26%
Median boarding time:     3.4 hours        2.6 hours       -24%
P90 boarding time:        8.1 hours        5.8 hours       -28%
Diversion hours/month:    28 hours         14 hours        -50%
Patient complaints (ED):  142/month        98/month        -31%

Contributing factors:
  1. Real-time visibility:  Bed management sees openings immediately
  2. Proactive planning:    Predicted discharges enable pre-assignment
  3. Accountability:        Visible metrics drive faster turnaround
  4. Alert escalation:      Critical thresholds trigger immediate action

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