I work in company where R&D and production are closely connected, so we need to manipulate with not fixed amounts of spare parts during tests, and latter number of spare parts depends not only on our solutions but also on law regulations of countries we are exporting to. So more or less it should be easily editable and we should be able to use it for transfer of numbers to SAP so we can calculate prices of products and to make proper ordering of items from suppliers. It is not a question for us, in this moment, if it will be admin or user access, just if there is solution that works.
I can imagine workflow that works for final product, based on amount percent, but for testing we sometimes reuse components of previous test objects, so we need to make lists only of items that are needed for testing. I do not know how to do it inside NX/TC environment.
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Enjoy your work and have fun!