This is the 2848th most frequent Japanese word.
おおむね
"おおむね" means "generally" or "mostly."
おおむね is used here to convey that the majority of the status or nature of the project is smooth, accommodating minor exceptions.
そのプロジェクトの進捗はおおむね順調です。
The progress of the project is generally smooth.
Here, おおむね indicates an overall agreement, while still leaving room for a few points of disagreement.
おおむね、彼の意見には賛成です。
I generally agree with his opinion.
In this sentence, おおむね expresses an overall comprehension of the book, allowing for minor misunderstood parts.