NEBOSH IDP IA3 – Summary

Element IA3: Loss Causation and Incident Investigation

1. Theories/Models and Use of Loss Causation Techniques                                                                                                 3-3

• Accident/Incident Ratio Studies                                                                                                     3-3

• Domino and Multi-Causality Theories                                                                                              3-4

• Single Cause Domino Theory                                                                                                         3-5

• Reason’s Model of Accident Causation                                                                                          3-8

• Behavioural Root Cause Analysis                                                                                                        3-11

• Study Questions                                                                                                                         3-11

1. Quantitative Analysis of Accident and Ill-Health Data                                                                                                   3-12

• Calculating Loss Rates from Raw Data                                                                                                  3-12

• Presenting and Interpreting Loss Event Data                                                                                 3-13

• Principles of Statistical Variability, Validity and the Use of Distributions                                          3-16

• Study Question                                                                                                                           3-18

1. Reporting and Recording of Loss Events (Injuries, Ill Health, Dangerous Occurrences) and Near Misses              3-19

• Reporting Requirements and Procedures                                                                                      3-19

• Internal Reporting and Recording                                                                                                 3-21

• Study Questions                                                                                                                         3-27

1. Loss and Near-Miss Investigations                                                                                                                                     3-28

• Implied Legal Requirements                                                                                                         3-28

• Reasons for Carrying Out Investigations                                                                                       3-29

• Benefits of Carrying Out Investigations                                                                                         3-30

• Investigation Procedures and Methodologies                                                                                3-31

• Communications Focusing on Remedial Actions and Lessons Learnt                                              3-37

• Study Questions         3-38