You are right that big scale and high margins means that a small effort can have an outsized impact. I use ARR as a proxy for the importance of the project. To

You are right that big scale and high margins means that a small effort can have an outsized impact. I use ARR as a proxy for the importance of the project. To give you the details, the relative impact is in the 1-10% range for my org. This was a multi-year, multi-team effort to deliver a significantly complex and ambiguous system (the first of it's kind in my org) and it will have a big impact beyond the monetary value.