This report "Ignition Probability Model – MISOF" presents an ignition probability model for potential ignition sources located offshore oil and gas installations. The model is named MISOF, which is short for Modelling of Ignition Sources on Offshore oil and gas Facilities. The report was last revised December 2018. The model has now been updated by Equinor, ConocoPhillips and Total, and the new version is now available to the industry.