Most franchisors with 20+ units assign dedicated business coaches to franchisees to ensure operating compliance, help solve problems and bolster sales.
For example, here is what Jimmy Johns claims to do:
1 coach per 26 stores and they visit for a full day at least once every 30 days. If there are any issues or suggestions they are discussed with corporate if necessary and a written response is provided thr following day.
The reasoning goes that nothing should linger and everything is fixed immediately.
As comparison, Culvers has one coach for about 20 stores, but obviously they are much bigger stores. I believe Culvers has had only one store closure. A ratio under 40 units per coach is better than average.