New Quality Processes

The Quality Manual for my organisation is quite a generic document as it contains the high-level manner in which the organisation meets the requirement of the standard. There is some high-level process described but there is no detailed procedure, which I understand to be the correct way, i.e. the manual documents the 'what' we do; not 'how' we do it. Various key procedures (how we do it) which fall in-scope have recently changed, but the nature of these procedures does not necessitate a change to the Quality Manual. What is a good way of capturing these procedure changes; would it be a specific document? A list of key procedures perhaps? Thanks for your help. Brian.