Yolanda, Yovi2021-08-232021-08-232020-10wahyu sari yenihttps://repository.unri.ac.id/handle/123456789/10110The Consumer Price Index (CPI) is an important macroeconomic indicator. In this study, the Pekanbaru City CPI modeling 2014-2019 is discussed based on the Autoregressive Integrated Moving Average (ARIMA) approach and the Error Correction Model (ECM) approach. The first step is to check the stationarity of the data, then it is processed to form a model based on the two approaches. Furthermore, the accuracy level of the ARIMA and ECM model equation is compared. This study shows that ECM approach is better than ARIMA for modelling Pekanbaru City CPI.enConsumer Price IndexAutoregressive Integrated Moving AverageError Correction ModelArticle