A Markov chain model is one of the stochastic process methods to forecast the state of the systematic changes in a timely basis. This study applies a Markov chain model to analyze perceived service quality by observing customer behaviors of a convenient store. In addition, the mean first passage times are computed to evaluate the expected number of transitions from one state to another in terms of money spent with different customers' perceived service quality. This approach provides researchers to measure service quality from another viewpoint.