PDFX-ready is a Swiss initiative founded in 2005. The goal is to promote and facilitate the use of the PDF/X ISO Standards for the exchange of printing data.
PDFX-ready creates guidelines, instruction sheets (called recipies), application settings (colour, pdf export) and preflight profiles. The PDFX-ready specifications are based on the PDF/X-Plus specifications of the Ghent (PDF) Workgroup.
Ghent (PDF) Workgroup

PDFX-ready Settings V2.4 for PDF/X-4 CMYK Workflow with Adobe CS/CC
PDFX-ready has released V2.4 of the PDF/X-4 CMYK Workflow for Adobe Creative Suite and Creative Cloud.

The new version supports the new ECI color profiles for sheetfed offset printing based on ISO 12647-2:2013.

In addition the changes in the recently released GWG 2015 specifications of the Ghent (PDF) Workgroup have been incorportated.

In particular the color settings and the preflight profiles have been updated.
Adobe CS/CC PDF/X-4

PDFX-ready Guideline now available in English
The PDFX-ready Guideline covers the entire workflow from the creation of images and illustrations, the design of the layout, the correct PDF export, preflight and output of PDF/X files. This guideline concentrates on the PDF/X-4 workflow using CMYK and spot colours.
PDFX-ready Guideline

PDFX-ready Output Test Pages
The PDFX-ready Output Test Pages can be used to check an output workflow for PDF/X-4 compatibility. The test pages are using the test patches of the Ghent PDF Output Suite 4.0.
Output Test

More information on german pages (translation)
On the german pages of PDFX-ready there is more detailed information about PDFX-ready workflows and settings available.
German PDFX-ready homepage in Google Translate

CH-9014 St.Gallen