# MES intro question

**URL:** <https://forum.inductiveautomation.com/t/mes-intro-question/5166>\
**Category:** 3rd Party Modules\
**Created:** [September 19, 2012, 6:14pm UTC](https://forum.inductiveautomation.com/t/mes-intro-question/5166 "2012-09-19T18:14:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![segregory](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@segregory](https://forum.inductiveautomation.com/u/segregory)\
**Post date:** [September 19, 2012, 6:14pm UTC](https://forum.inductiveautomation.com/t/mes-intro-question/5166/1 "2012-09-19T18:14:55Z")

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Hello,  
I just want to verify - if I want the OEE module, what do I have to buy as a prerequisite to have the Ignition ‘platform’? Is The Works required? Or can I buy a different module that would install the “Ignition Core Modules” prerequisite? (Vision?)  
Thank you!!!

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**Author:** ![Travis.Cox](https://avatars.discourse-cdn.com/v4/letter/t/b9bd4f/32.png) [@Travis.Cox](https://forum.inductiveautomation.com/u/Travis.Cox)\
**Post date:** [September 20, 2012, 3:39pm UTC](https://forum.inductiveautomation.com/t/mes-intro-question/5166/2 "2012-09-20T15:39:55Z")

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In order to use the OEE / Downtime modules all you need is Ignition with the Vision module. You don’t need the SQL Bridge or Reporting modules.