While I hope that you never have to do one, there may come a time where a workplace investigation is needed.
Workplace investigations come about for any number of reasons, though the most common are due to a complaint from a customer/client about a staff member; a complaint from an employee about another employee; or even from a stocktake/audit.
As a manager or business owner, you will need to make the decision as to whether the investigation is handled internally or given to an external investigator.
As every investigation/complaint should be assessed and worked through individually, it is often difficult to know when it should be handled internally, and when it should be given to an external investigator.