Opposite of "granular"

Solution 1:

If the sense is close to the source of the granular metaphor from the real world, the group of actual grains (of sand) in concrete and geology is aggregate, and I understand it means the opposite thing when you say you will look at X at the most granular level, and you will look at X in the aggregate.

If the sense of granularity is within the business context of "the opposite of detail oriented", the big picture, vision and 30,000 foot view are applicable MBA buzzwords.

Solution 2:

In the context, I'd use coarse or coarseness. The granularity you refer to implies levels of fine detail in the data. Coarseness implies increasing levels of 'lower detail' using similar language.

Solution 3:

In this use case I would apply "holistic".

Holistic
adjective

Philosophy
1 Characterized by the belief that the parts of something are intimately interconnected and explicable only by reference to the whole.

Example sentences

• ‘Moreover, holistic method has proved useful in the hard sciences, for example in the geological theory of plate tectonics.’
• ‘If so, a paradigm shift to the holistic approach might be managed.’
• ‘These two books bring a holistic approach to the analysis of transport and transport networks.’
• ‘We will all need to get beyond our individual narrow interests and begin to develop a holistic solution that works for everyone.’
• ‘I think where Chaos and Complexity theory are really going, is, a holistic understanding of the universe.’

1.1 Medicine
Characterized by the treatment of the whole person, taking into account mental and social factors, rather than just the symptoms of a disease.

https://en.oxforddictionaries.com/definition/holistic