If you want to know how far you stand with the implementation of your BCM operation, you can carry out a (self-) assessment with a self-assessment BCM-tool.
There are specialists for hire to do an audit and write an expensive report. But often you do not have the money in times of crisis. Then you have to do it yourself. You need a tool for that. Here you will find a Dutch simple Excel tool (and an English translation) that you can still adapt to your own needs.