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Using Big Data and Deep Learning for CVR Improvement
 株式会社ZOZOテクノロジーズ
 技術開発本部 ECプラットフォーム部 推薦基盤
 アニルドフ　ジャムカンヂ Copyright © ZOZO Technologies, Inc. 1

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© ZOZO Technologies, Inc. 2 1. Problem Statement 2. Brief Introduction/Summary of Previous Approaches 3. Present Approach 4. Workflow Structure AGENDA

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© ZOZO Technologies, Inc. 3 SELF INTRODUCTION ● 株式会社ZOZOテクノロジーズ ● 技術開発本部 ECプラットフォーム部 推薦基盤 ● アニルドフ　ジャムカンヂ (Anirudh Jamkhandi) @anirudhgj 
 ● Joined ZOZO Technologies Inc in 2019 as a new graduate. ● Currently working as MLエンジニア

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© ZOZO Technologies, Inc. 4 PROBLEM STATEMENT

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© ZOZO Technologies, Inc. Buy or Not ! 5 PROBLEM STATEMENT

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© ZOZO Technologies, Inc. Browsing history ENCODER STATIC USER INTERESTS Buy or not ! Target Shop or item 6 SUMMARY OF PREVIOUS MODELS

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© ZOZO Technologies, Inc. Browsing history ENCODER STATIC USER INTERESTS Buy or not ! Target Shop or item 7 SUMMARY OF PREVIOUS MODELS Hard to capture User’s Diverse Interests in a static encoder vector

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© ZOZO Technologies, Inc. Local activation : Only part of Customer’s interests will influence his/her action Target Shop or item Browsing history MOTIVATION 8

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© ZOZO Technologies, Inc. Local activation : Only part of Customer’s interests will influence his/her action Browsing history Target Shop or item MOTIVATION 9

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© ZOZO Technologies, Inc. Target Shop or Item MOTIVATION 10 Reference :- [Zhou, Guorui, et al. "Deep interest network for click-through rate prediction." Proceedings of the 24th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining. 2018.]

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© ZOZO Technologies, Inc. Target Shop or Item MOTIVATION 11 Reference :- [Zhou, Guorui, et al. "Deep interest network for click-through rate prediction." Proceedings of the 24th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining. 2018.]

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© ZOZO Technologies, Inc. Target Shop or Item MOTIVATION 12 Reference :- [Zhou, Guorui, et al. "Deep interest network for click-through rate prediction." Proceedings of the 24th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining. 2018.]

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© ZOZO Technologies, Inc. Browsing history ENCODER STATIC USER INTERESTS Buy or not ! Target Shop or item PRESENT MODEL 13 Local activation

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© ZOZO Technologies, Inc. Browsing history ENCODER Buy or not ! Target Shop or item PRESENT MODEL 14 Local activation LOCAL USER INTERESTS

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© ZOZO Technologies, Inc. Browsing history ENCODER Buy or not ! Target Shop or item PRESENT MODEL 15 Local activation LOCAL USER INTERESTS Dynamic Interest Model

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© ZOZO Technologies, Inc. Browsing history ENCODER Buy or not ! Target Shop or item PRESENT MODEL 16 Local activation DYNAMIC LOCAL USER INTERESTS Dynamic Interest Model

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© ZOZO Technologies, Inc. Buy probability! [Zhou, Guorui, et al. Deep interest evolution network for click-through rate prediction. AAAI 2019] 17 DYNAMIC INTEREST MODEL LOCAL ACTIVATION MODEL PRESENT MODEL

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© ZOZO Technologies, Inc. 18 WORKFLOW STRUCTURE Browsing History logs

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© ZOZO Technologies, Inc. 19 WORKFLOW STRUCTURE Browsing History logs BigQuery Cloud Storage

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© ZOZO Technologies, Inc. 20 WORKFLOW STRUCTURE Browsing History logs Cloud Storage AI Platform BigQuery

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© ZOZO Technologies, Inc. 21 1.Model Train 2.Model Test WORKFLOW STRUCTURE Browsing History logs Cloud Storage AI Platform BigQuery

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© ZOZO Technologies, Inc. 22 1.Model Train 2.Model Test 1.Store Model Cache 2.Store Predictions WORKFLOW STRUCTURE Browsing History logs Cloud Storage AI Platform Cloud Storage BigQuery BigQuery

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© ZOZO Technologies, Inc. 23 1.Model Train 2.Model Test CI/CD WORKFLOW STRUCTURE Cloud Storage AI Platform 1.Store Model Cache 2.Store Predictions Github Actions Browsing History logs BigQuery Cloud Storage BigQuery

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© ZOZO Technologies, Inc. 24 1.Model Train 2.Model Test CI/CD WORKFLOW STRUCTURE Cloud Storage AI Platform Github Actions Browsing History logs Workflow Management BigQuery 1.Store Model Cache 2.Store Predictions Cloud Storage BigQuery

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© ZOZO Technologies, Inc. THANK YOU! 25

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