This paper provides a comprehensive literature review on the design and control of warehouse order picking processes. Order picking is identified as the most labor-intensive and costly activity in warehouses, accounting for up to 55% of total operating expenses. The paper focuses on key decision areas such as optimal layout design, storage assignment methods, routing methods, order batching, and zoning. Despite recent advancements, combinations of these areas have received limited attention in academic research. The paper highlights the importance of order picking in improving warehouse efficiency and service levels, and discusses various trends and challenges in manufacturing and distribution logistics. It also reviews recent developments in academic literature, including layout design, storage assignment, batching, routing, and order accumulation. The paper concludes by discussing potential research directions and the need for more integrated models that consider multiple decision areas simultaneously.This paper provides a comprehensive literature review on the design and control of warehouse order picking processes. Order picking is identified as the most labor-intensive and costly activity in warehouses, accounting for up to 55% of total operating expenses. The paper focuses on key decision areas such as optimal layout design, storage assignment methods, routing methods, order batching, and zoning. Despite recent advancements, combinations of these areas have received limited attention in academic research. The paper highlights the importance of order picking in improving warehouse efficiency and service levels, and discusses various trends and challenges in manufacturing and distribution logistics. It also reviews recent developments in academic literature, including layout design, storage assignment, batching, routing, and order accumulation. The paper concludes by discussing potential research directions and the need for more integrated models that consider multiple decision areas simultaneously.