> For the complete documentation index, see [llms.txt](https://manual.industryapps.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://manual.industryapps.net/get-started-in-iapps/pre-production/event/production-line-master.md).
# Production Line Master
Production line in a factory is a sequence of machines arranged in a particular manner as part of manufacturing process. (Production Line Master is a master data App that comes along with Digital Work Instruction subscription)
The production line can be tagged with the list of machines based on the selected operation type. User groups which will have access to the production line can be assigned as well. Shifts/Shift Model of the production line can also be tagged in this master.
Once the created shifts or shift model gets linked to a production line, the shift dwontimes will be visible in the event calendar.
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