Summarising the interactions between reactive and proactive measures
| Type of navigational aid | ||
|---|---|---|
| Reactive measures | Proactive measures | |
| Local and organisational conditions | Analysis of many incidents can reveal recurrent patterns of cause and effect | Identify those conditions most needing correction, leading to steady gains in resistance or fitness |
| Defences, barriers and safeguards | Each event shows a partial or complete trajectory through the defences | Regular checks reveal where holes exist now and where they are most likely to appear next |