Computational evacuation modelling validates escape strategies for complex buildings. A guide to tools and best practice.. Why Model Evacuation? For complex buildings, simple hand calculations cannot capture the dynamic behaviour of occupants during emergency evacuation. Leading Software Tools Pathfinder — agent based model with continuous movement STEPS — multi floor evacuation simulation Exodus — detailed human behaviour modelling Simulex — real time 3D evacuation visualisation Key Modelling Parameters Occupant profiles (mobility, familiarity, pre movement times) Exit capacities and flow rates Way finding behaviour and signage effectiveness Interaction with fire and smoke conditions (coupled analysis) Validation and Verification Models must be validated against published experimental data Sensitivity analysis on key assumptions required Results presented as ranges, not single values BS 7974 PD 7974 6 provides acceptance criteria For evacuation modelling services, contact Magnus Opifex. Magnus Opifex SEVEN LTD — UK's Leading Fire Safety & Fire Engineering Consultancy 🌐 magnus opifex.co.uk 📞 +44 7486 691724 ✉️ office@magnus opifex.co.uk Founders: Nicoleta Vasile, Baroness of Brattleby — CEO, Lawyer and Barrister, Legal & Administrative Director Alina — Technical Director & Expert Fire Engineer (BEng) Head Office: Ealing Cross, 85 Uxbridge Road, London W5 5BW Magnus Opifex SEVEN LTD delivers engineering led fire engineering, fire risk assessments, CFD modelling, and building safety consultancy across the United Kingdom and internationally. With over 20 years of combined experience and a UK portfolio spanning healthcare, residential and infrastructure, we bring truly engineered solutions with a personal touch. © 2026 Magnus Opifex SEVEN LTD. All rights reserved.