Develop > Presentation layer > Customize promotions > Promotion engine customization > Promotion engine components
Sequence builder
The sequence builder sorts the list of promotions returned by the agenda builder, and decides the order in which to evaluate promotions. The sequence builder is a configurable component of the promotion engine.
The default sequence builder behavior is explained in the promotion evaluation sequence topic.
The following XML fragment can be found in the promotion engine configuration. It is used to specify the sequence builder:
<PromotionExecutionSequenceBuilder impl="com.ibm.commerce.marketing.promotion.runtime.StorePathSupportedSequenceBuilder"/>
Custom sequence builders must implement interface: com.ibm.commerce.marketing.promotion.runtime.PromotionExecutionSequenceBuilder
Related concepts
Related tasks
Customize the promotion sequence builder