The phrase "sufficient levels" means having enough or an appropriate amount of something needed for a particular purpose or requirement. Full definition
All schedules must contain accurate scope (s) with sufficient levels of details as project (s) and / or program (s) moves through the development phases. (glassdoor.com)
Bronze: Fund with advantages that outweigh the disadvantages across the five pillars and with sufficient level of analyst conviction to warrant a positive rating. (nylinvestments.com)
Vitamin D needs to be present at sufficient levels in the cell in order for the thyroid hormone to actually affect that cell. (verywellhealth.com)