Industrial process use single and double Exponential Weighted Moving Average control charts to detect small shifts in it. Occasionally there is a need to detect small trends instead of shifts, but the effectiveness to detect small trends. A new control chart is proposed to detect a small drift.
Abreu, R. P., & Schaffer J. R. (2017). A Double EWMA Control Chart for the Individuals Based on a Linear Prediction. Journal of Modern Applied Statistical Methods, 16(2), 443-457. doi: 10.22237/jmasm/1509495840