OSCAd is intended to be used for each individual open source software program or library used by a project. That is necessary because you have to fulfill the license conditions for every single open source software. In general grouping is not possible.
But if you use the open source software only internally without distributing it to any third party, the OSCAd analysis often (but not always) leads to the same conclusion: you have to do nothing but to respect some interdictions.
This check determines whether all software packages that you use are covered by a use-case that allows a simplfied solution. If it is, you will get a list of interdictions that apply to all of the open source software that you want to use and you won't have to call the OSCAd for each single open source software package.