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  • NCS4 Crowd Safety Course
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  • 8.2 The 80% Rule: Why Balanced Systems Fail
    1. Welcome to the NCS4 Crowd Safety Course
    Announcements
    Read First: How to Navigate / Complete this course
    Forum
    Crowd Science: Safety and Risk Analysis (Article)
    Course Overview Mind Map
    Resources
    Downloads - Density Image Packs
    International Crowd Density Images
    2. Crowd Science and DIM-ICE
    2.2 Crowd Disasters Footage
    2.3 Causes of Accidents and the DIM-ICE Model
    Topic Discussion Forum
    3. Crowd Dynamics
    3.1 Static density and the vocabulary problem
    3.2 Density, flow, and the colour vocabulary
    3.4 Monaco GP with sound
    3.5 Shockwaves and the accident pyramid
    3.6 Monaco shockwave revisited and the redesign prompt
    3.7 The Monaco solution and the zigzag principle
    3.8 Crowd disasters and the Jamarat Bridge problem
    3.9 The Jamarat redesign and the foreseeable principle
    Resources
    Crowd Density Levels 1 – 5 ppm
    Crowd Dynamics Forum
    4. Crowd Modelling
    4.1 Crowd Modelling
    Topic Discussion Forum
    4.2 London NYE - Solution
    5. RAMP Analysis
    5.1 The RAMP framework
    RAMP Discussion Forum
    5.2 RAMP applied to the inaugurations
    RAMP
    6. Crowd Counting
    6. Crowd Counting
    Crowd Counting Forum
    7. Control Room Information
    7. Control Room Information
    Topic Discussion Forum
    8. Queueing Systems
    8.1 Arrival, Service and the Soft-Target Queue
    8.2 The 80% Rule: Why Balanced Systems Fail
    8.3 The Queuing Formula in Practice
    8.4 The Bottleneck Problem
    8.5 Moving the Service Upstream
    Topic Discussion Forum
    9. Crowd Risk Analysis
    9. Crowd Risk Analysis
    Topic Discussion Forum
    10. Event Egress Analysis
    10.1 Event Egress Analysis
    Topic Discussion Forum
    10.2 Simple Site Model
    11. Strategic and Tactical Analysis
    11. Strategic and Tactical Analysis
    DIM-ICE Templates
    Topic Discussion Forum
    12. Emergency Situations
    12. Emergency Situations
    Topic Discussion Forum
    13. Course Summary
    13. Course Summary
    Topic Discussion Forum
    14. Assessments and Certificates
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  3. 8.2 The 80% Rule: Why Balanced Systems Fail

8.2 The 80% Rule: Why Balanced Systems Fail

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