Integration with Other Applications > Introduction to Windchill ESI > Using Windchill Integration for MES > MES Integration Implementation Considerations > Business Processes and Organizational Considerations > Handling Effectivity in Windchill Integration for MES
  
Handling Effectivity in Windchill Integration for MES
For object-centric releases, there is no effectivity set on objects. For CN-centric releases, all materials will have effectivity equal to the day the transaction was published; all BOMs will have effectivity equal to the effectivity set in the CN task that had the BOM listed as a resulting item; and the CN’s effectivity in MES will be equal to the earliest effectivity on the CN. If materials are created or changed, that will be equal to the day of the release.
Once you review these and make your decisions, you will be prepared to make informed choices when configuring Windchill Integration for MESand be able to smoothly integrate the PLM services offered by Windchill PDMLink with the services offered by your distribution targets.
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Besides date effectivity (which is what is being referred to in the last two paragraphs), there is added support for publication of serial/lot effectivity. Thus, when making decisions around effectivity, consideration should be given for serial/lot effectivity as well as date effectivity.