Note on: Optimal choice for appointment scheduling window under patient no-show behavior

In a recently published article, Liu (2016) used M/M/1/K and M/D/1/K queuing models to determine the optimal window for patient appointment scheduling considering clinic environ- mental factors such as panel size, provider service rate, and delay-dependent no-show probability. In this note, we show that the application of one of the no-show functions was incorrect. The required corrections are proposed.