Starbucks SBUX.O CEO Brian Niccol told Reuters on Tuesday that he would accelerate the rollout of the coffeehouse chain’s new staffing and service model, aiming for all 18,000 North American stores by summer’s end,

The plan applies to the more than 11,000 company-owned stores in North America, rather than the roughly 18,000 combined company-owned and licensed stores, Starbucks said. Niccol says the model is a foundational element of his turnaround strategy for the company,