Word for evaluating or understanding a system as a whole

Trying to rediscover a word I used to enjoy using but have forgotten. To mean something like: "Looking at something as a sum of its constituent interconnected parts". My dodgy brain keeps returning 'heuristic"...

"From a ____ point of view I would say...."

The opposite would be

"From a granular point of view I would say..."

Solution 1:

You might be looking for holistic:

2 : relating to or concerned with wholes or with complete systems rather than with the analysis of, treatment of, or dissection into parts
// holistic medicine attempts to treat both the mind and the body
// holistic ecology views humans and the environment as a single system

(source: Merriam Webster)

Looking at individual letters, 'holistic' is not that much different from 'heuristic', so that would explain your recall of it. (Of course, it does mean something entirely different, but you know that already.)