Adding a time stamp post action in BPM process?

[Ilyaas]

Scenario: multiple approval process within BPM and want to add a timestamp to relevant custom fields 21 - 25 once an approval has taken place to allow us to monitor time between approvals. 

EG x y and z approvers within a bpm

x approves > add timestamp (custom21) with date time of approval
y approves > add timestamp (custom22) with date time of approval
z approves > add timestamp (custom23) with date time of approval

This will help us to identify and report on time with a certain approver etc. 

when updating the custom field im not sure on what to enter. technical level relatively low so not sure on next steps. searched all sorts on forum but couldn't find answer hence post

[Jeremy]

@ilyaas you can add a node after the request has been authorised with this node

You would probably need a parallel process with the three authorisations (in your example) to then add the timestamp to the custom fields in the request

[Ilyaas]

@Jeremy brilliant thanks. As daft as it sounds i simply scrolled down to hornbill on the cloud automation list assuming it would be in there. much appreciated