ISO 45001 defines the terms “continual improvement” as “recurring activity to enhance performance”.
The standard further goes on explaining that in OH&S system enhancing performance corresponds to the application of the OH&S management system so as to attain improvement in overall OH&S performance consistent with the OH&S policy and OH&S objectives.
Continual never mean continuous, so the activities does not require to take place all the time or in all regions simultaneously. It is a systematic activity to gradually improve towards a better way of doing work.
Check if documented information is required for continual improvement.
The whole chapter 10 of ISO 45001 i.e. continual improvement discusses the requirements for an organization to continually improve their OH&S management system.