Understanding Backfill and Lookback Limits in Adobe CJA | Community
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DhanA2
DhanA2
Level 3
September 20, 2024
Question

Understanding Backfill and Lookback Limits in Adobe CJA

  • September 20, 2024
  • 1 reply
  • 1368 views

Hello experts,
I can see multiple limits can anyone explain it with realtime scenario why we have these limits and major differences?
Customer Journey Analytics (CJA) Backfill limits:

Stitching Method Initial Backfill Duration Lookback Window Hard Limit for Backfilling Identities Replay Frequency Options
Field-based StitchingUp to 13 months1 day, up to 7 days3 monthsDaily, Weekly
Graph-based StitchingUp to 25 months1 day, up to 30 days3 monthsDaily, Weekly

@brianau1 

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1 reply

Josh Stephens
Community Advisor
Josh StephensCommunity Advisor
Community Advisor
September 21, 2024

Hi @dhana2 

The stitching options available are based upon the CJA package your organization has.  The options available for each package are explained here.

DhanA2
DhanA2Author
Level 3
September 26, 2024

This statement clarified my doubt: Correct me If I'm wrong 

The lookback window affects attribution analysis for campaigns, while hard limits restrict the volume of identifiable data processed.

Josh Stephens
Community Advisor
Josh StephensCommunity Advisor
Community Advisor
September 27, 2024

For stitching, the lookback window defines how far back CJA will look to build a  relationship.

 

For example,

Monday - Brand new visitor on mobile web, cookieID abc123.  Looks at site, doesn't log in.

 

Thursday - Same visitor returns from desktop, cookie ID xyz123.  Creates an account and logs.  loginID 1111

 

Friday - Same visitor returns from mobile web, abc123 and logs in (loginID 1111).

 

If a replay happens on Saturday with a 7 day lookback window, CJA will stitch abc123 & xyz123 into the same person loginID 1111.

 

If a replay happens each day with a daily lookback, the visitor would not be stitched together since the shorter lookback period wouldn't find a relationship.

 

This is separate from using attribution IQ in Workspace.  You can set this lookback & attribution model at the time of report processing.  Stitching would impact the attribution IQ results as People are stitched together in more accurate ways.

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