Olive Young Secures Flexibility in Delivery Optimization Logic by Applying Strategy Pattern

Olive Young's Delivery Optimization Squad introduced the Strategy Pattern to overcome the limitations of the existing if-else approach. Instead of simple conditional branching, they adopted a structure that encapsulates changing behaviors into classes, allowing them to be swapped at runtime.

Architecture Design for Complex Logic

Reflecting the characteristics of the delivery domain, which requires complex judgments rather than single rules, they separated Selection Strategy (candidate filtering) and Decision Strategy (final confirmation). By adopting the Composite Pattern to handle individual strategies and object groups through the same interface, they designed the system to allow extension without modifying existing code when adding new rules.

Operational Flexibility and Performance Optimization

They enabled control over strategy activation states via the database, allowing rules to be turned On/Off immediately without deployment. This serves as a case study completing the Open-Closed Principle. Additionally, they applied the Short-circuiting technique by placing high-cost operations such as external API calls later in the sequence and stopping subsequent logic if a conclusion is reached in earlier strategies, thereby reducing unnecessary network I/O and improving system response time.