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Question

 ANIKET DASGUPTA (ANIKETD5)
Cognizant Technology Solutions

Cognizant Technology Solutions
IN
ANIKETD5 Member since 2014 18 posts
Cognizant Technology Solutions
Posted: Nov 13, 2018
Last activity: Dec 6, 2018
Posted: 13 Nov 2018 10:15 EST
Last activity: 6 Dec 2018 8:08 EST
Closed

Implement Delayed Learning in adaptive model

Hi,

I need to implement delayed learning in adaptive model.

I have read about the various learning options and how PEGA implements delayed learning by utilising Cassandra. I have built a request and a response data flow for feeding the models.

So as I understand, during making a request, Cassandra will store the interactionID(which should not go to adaptive Model data set) and during response this interaction should be mapped with the incoming request and then only the response should be fed to adaptive.

Here the question is , during the time of making decision, when predictor inputs are recorded, is there a way to run an activity/data flow which will feed the adaptive model in case no response was received within the configured time (TimeToLive)? So if there was no response within that time, how does adaptive (Adaptive data set) get updated after the TimeToLive expires?

Thanks in advance.

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Pega Customer Decision Hub
Decision Management

Posted: 6 years ago
Posted: 13 Nov 2018 12:03 EST
Otto Perdeck (Otto_Perdeck)
PEGA
Director, Data Science, Machine Learning & AI
Pegasystems Inc.
NL

Good questions.

The most common pattern to handle implicit negatives is to post a negative at decision time. Yes this means double counting of the positives but when you use it for ranking, that does not influence the ranking.

The "royal" way is to introduce a time-out for both positives and negatives, so queue them up, then only after that time-out feed them to adaptive. This pattern has been productized in the so-called "outcome optimizer" which is part of NBA designer. Under the covers, this uses an ESM window to keep the responses and only send the last one (i.e. the positive one if there is one, otherwise the earlier posted negative) to ADM.

 

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Posted: 6 years ago
Posted: 14 Nov 2018 1:53 EST
Girish Kamath (kamag)
PEGA
Software Architect, Decisioning Operations
Pegasystems Inc.
IN

I second Otto's comments. You can have a look at the following to know what the feature is. The delayed learning portion is automatically handled if you are using this feature.

Configuring outcome optimization strategies - 

https://community.pega.com/knowledgebase/articles/configuring-outcome-optimization-strategies

Pega 8.1 Update: What's New in Outcome Optimization -

https://community.pega.com/video-library/pega-81-update-whats-new-outcome-optimization

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Posted: 5 years ago
Posted: 5 Dec 2018 11:54 EST
ANIKET DASGUPTA (ANIKETD5)
Cognizant Technology Solutions

Cognizant Technology Solutions
IN

Hi All,

Thank you for you answers.

I have one more question.

How is Cassandra data removed (or marked expired) after the Time To Live expires?

Is there any agent which is updating the pxDecisionresults (& Event Store) after the TTL expires?

Thank you in advance!

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