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kzimmerman (Kate Zimmerman)
Senior Director of Decision Science, Wikimedia Foundation

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User Details

User Since
Oct 26 2018, 9:14 PM (371 w, 1 d)
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MediaWiki User
KZimmerman (WMF) [ Global Accounts ]

I lead the Research & Decision Science group in the Wikimedia Foundation. We provide data, analysis, and insights that support strategic and tactical decision-making in the Foundation and our communities. We also build algorithms and turn research questions into publicly shared knowledge.

Research & Decision Science Teams:

Recent Activity

Sat, Nov 8

kzimmerman added a comment to T339291: Should temp users be counted as registered & active users on Special:Statistics?.

@kzimmerman do you have an input on this task? Or if you know who does please include them.

Sat, Nov 8, 12:27 AM · Temporary accounts (Global wiki rollout), OKR-Work, Trust and Safety Product Team, MediaWiki-User-management, MediaWiki-Special-pages

Jun 24 2025

kzimmerman closed T310732: "Source of truth" dataset for pageviews as Declined.
Jun 24 2025, 7:33 PM · Movement-Metrics, Movement-Insights, Data-Engineering, Foundational Technology Requests
kzimmerman added a comment to T310732: "Source of truth" dataset for pageviews.

Yes, I think it makes sense to decline this. The underlying need articulated here is something we're addressing in SDS 1 Metrics for FY 25-26, but that work will be captured in newer tasks.

Jun 24 2025, 7:33 PM · Movement-Metrics, Movement-Insights, Data-Engineering, Foundational Technology Requests

Jun 18 2025

kzimmerman assigned T395216: [Request] Research into suspicious account behaviors to nettrom_WMF.

Assigning this to Morten for Q1

Jun 18 2025, 7:14 PM · Product-Analytics, WE4.2 Anti-abuse, Trust and Safety Product Team

May 28 2025

kzimmerman added a comment to T366222: Investigation: how many event participants have been affected by IP Blocks.

Noting that this work is continuing as a hypothesis: WE4.2.21 Metric for measuring how event participants are impacted by IP blocks (Asana board, Foundation internal only)

May 28 2025, 10:51 PM · Connection-Team, Product-Analytics (Kanban), Trust and Safety Product Team, WE4.2 Anti-abuse, IP-Blocking-Impacts, CampaignEvents
kzimmerman added a project to T395134: [Request] Analyzing the roll-out of temp accounts on major pilots as it impacts anti-abuse work: Product-Analytics.
May 28 2025, 10:33 PM · OKR-Work, Trust and Safety Product Team, Temporary accounts, Research (FY2025-26-Research-July-September), Product-Analytics

Apr 11 2025

kzimmerman closed T374500: ETL pipeline for campaigns-product key metrics: Destination tables schemas, a subtask of T374491: Create ETL pipelines for campaigns-product baseline metrics, as Declined.
Apr 11 2025, 1:00 AM · Data-Engineering-Radar, Data-Engineering, User-Iflorez, Product-Analytics (Kanban), Connection-Team
kzimmerman closed T374500: ETL pipeline for campaigns-product key metrics: Destination tables schemas as Declined.

Declining this per T374479#10732134

Apr 11 2025, 1:00 AM · Product-Analytics (Kanban), User-Iflorez, Connection-Team
kzimmerman closed T374491: Create ETL pipelines for campaigns-product baseline metrics, a subtask of T374479: Campaigns-Product's Superset Dashboard, as Declined.
Apr 11 2025, 12:59 AM · Product-Analytics (Kanban), User-Iflorez, Connection-Team
kzimmerman closed T374491: Create ETL pipelines for campaigns-product baseline metrics as Declined.

Declining this per T374479#10732134

Apr 11 2025, 12:59 AM · Data-Engineering-Radar, Data-Engineering, User-Iflorez, Product-Analytics (Kanban), Connection-Team
kzimmerman closed T365404: Create a plan for moving campaigns-product metrics data to airflow, a subtask of T374479: Campaigns-Product's Superset Dashboard, as Declined.
Apr 11 2025, 12:59 AM · Product-Analytics (Kanban), User-Iflorez, Connection-Team
kzimmerman closed T365404: Create a plan for moving campaigns-product metrics data to airflow as Declined.

Declining this per T374479#10732134

Apr 11 2025, 12:59 AM · Connection-Team, User-Iflorez, Product-Analytics (Kanban)
kzimmerman closed T374479: Campaigns-Product's Superset Dashboard as Declined.

@ifried After digging into the workload and requirements for this, I am declining this request. I would like to connect with you on how we can work with Campaigns in the future to set up data tracking/workflows that make it more feasible to set up dashboards.

Apr 11 2025, 12:58 AM · Product-Analytics (Kanban), User-Iflorez, Connection-Team

Apr 9 2025

kzimmerman edited projects for T387878: https://www.mediawiki.org/wiki/Analytics/Server_Admin_Log should be on Wikitech, added: Data-Engineering; removed Product-Analytics.

These server admin logs are coming from Data Platform Engineering updates. Removing Product Analytics and adding Data Engineering.

Apr 9 2025, 5:56 PM · Data-Platform-SRE, Data-Engineering, Documentation

Apr 8 2025

kzimmerman closed T357439: [REQUEST] Help me understand how often Administrators disable JS as Invalid.

Closing this again since the new request has a ticket representing current needs: https://phabricator.wikimedia.org/T391415

Apr 8 2025, 10:52 PM · Product-Analytics

Mar 27 2025

kzimmerman closed T370096: QA data collection for Community Wishlist, a subtask of T368674: Instrumentation for Community Wishlist, as Declined.
Mar 27 2025, 7:27 PM · Product-Analytics, Community-Tech, Wishlist intake gadget
kzimmerman closed T370096: QA data collection for Community Wishlist as Declined.

Declining per https://phabricator.wikimedia.org/T372773#10684530

Mar 27 2025, 7:26 PM · Community-Tech, Wishlist intake gadget, Product-Analytics (Kanban)
kzimmerman closed T368674: Instrumentation for Community Wishlist, a subtask of T372773: Reporting for Community Wishlist, as Declined.
Mar 27 2025, 7:26 PM · Wishlist intake gadget, Community-Tech, Product-Analytics
kzimmerman closed T368674: Instrumentation for Community Wishlist as Declined.

Declining per https://phabricator.wikimedia.org/T372773#10684530

Mar 27 2025, 7:26 PM · Product-Analytics, Community-Tech, Wishlist intake gadget
kzimmerman closed T372773: Reporting for Community Wishlist as Declined.
Mar 27 2025, 7:25 PM · Wishlist intake gadget, Community-Tech, Product-Analytics
kzimmerman added a comment to T372773: Reporting for Community Wishlist.

Hi @JWheeler-WMF @KSiebert , this task has been sitting in the Product Analytics backlog for awhile. I'm declining it for the following reasons, but please let me know if you have additional context that I should consider:

  • The Wishlist is fairly niche/low traffic feature, so there is not a lot we will be able to gather from quantitative data.
  • Your team deprioritized the instrumentation in https://phabricator.wikimedia.org/T370170#10138603, and it was noted in that task that there are ways to get the pageview data if needed
Mar 27 2025, 7:25 PM · Wishlist intake gadget, Community-Tech, Product-Analytics

Feb 28 2025

kzimmerman closed T329471: Measuring reader visits to core project pages (on Vector 2022) as Declined.
Feb 28 2025, 7:35 PM · Product-Analytics, Vector 2022 (Tracking)
kzimmerman added a comment to T329471: Measuring reader visits to core project pages (on Vector 2022).

Hi @Sj ! I'm declining the analysis request on behalf of Product Analytics, as the work for that team is set based on priorities from Product Managers who work more directly with the community, and this work was not prioritized.

Feb 28 2025, 7:35 PM · Product-Analytics, Vector 2022 (Tracking)

Jan 25 2025

kzimmerman added a comment to T378852: Backfill and recalculate unique devices data from July 2024 to present.

And, this is done! all jobs have been backfilled.

Hooray! Congratulations and huge thank you @JAllemandou and team!

Jan 25 2025, 12:45 AM · Data-Engineering, Patch-For-Review, Data-Platform, Movement-Insights

Aug 26 2024

kzimmerman added a comment to T373379: Requesting access to airflow-analytics-product-admins group for jiawang.

Approved as Mikhail's manager!

Aug 26 2024, 9:44 PM · SRE, SRE-Access-Requests

May 10 2024

kzimmerman updated subscribers of T364126: Disable Chrome Private Prefetch Proxy.

Re: where to publish the decision record: per decision record recommendations from Tech Writing, it should be published "alongside other documentation used by project maintainers."

May 10 2024, 8:50 PM · Movement-Insights, Traffic

May 8 2024

kzimmerman updated subscribers of T364126: Disable Chrome Private Prefetch Proxy.

@ttaylor and @mark confirmed we can move forward.

May 8 2024, 3:37 PM · Movement-Insights, Traffic

Mar 21 2024

kzimmerman updated subscribers of T360073: Wikistats "Active Editors by Country" does not follow definition for active editors.

Hi @VirginiaPoundstone, my responses are below:

  • Does this relate to a current OKR?

I'm not sure if this relates to a current OKR - @CMyrick-WMF could answer that.

Mar 21 2024, 11:05 PM · Movement-Insights (FY25-26 H1), Data-Engineering-Radar, Data Pipelines, Data-Engineering

Mar 13 2024

kzimmerman triaged T360073: Wikistats "Active Editors by Country" does not follow definition for active editors as Medium priority.
Mar 13 2024, 8:54 PM · Movement-Insights (FY25-26 H1), Data-Engineering-Radar, Data Pipelines, Data-Engineering

Nov 27 2023

kzimmerman updated the task description for T322145: Requesting access to analytics-privatedata-users & Kerberos identity for Hghani.
Nov 27 2023, 7:14 PM · SRE, SRE-Access-Requests
kzimmerman updated subscribers of T322145: Requesting access to analytics-privatedata-users & Kerberos identity for Hghani.

Contract update: Hamid Ghani's contract has been extended, with a new end date of June 30, 2024. @OSefu-WMF is now Hamid's manager.

Nov 27 2023, 7:14 PM · SRE, SRE-Access-Requests

Nov 15 2023

kzimmerman added a comment to T351130: Add Hamid & Omari to analytics-product-users.

Approved, thanks!

Nov 15 2023, 5:56 PM · SRE, SRE-Access-Requests

Oct 7 2023

kzimmerman created T348365: [REQUEST] Review calculation for India unique devices measurement.
Oct 7 2023, 12:50 AM · Movement-Insights
kzimmerman updated kzimmerman.
Oct 7 2023, 12:24 AM
kzimmerman updated kzimmerman.
Oct 7 2023, 12:23 AM

Sep 8 2023

kzimmerman renamed T341301: Analyze impact on unique devices of data center launches from Analyze impact on unique devices following launch of Marseille DC to Analyze impact on unique devices of data center launches.
Sep 8 2023, 7:46 PM · Movement-Insights

Sep 7 2023

kzimmerman added a comment to T341301: Analyze impact on unique devices of data center launches.

I'm scheduling time to follow up with Selena & others on landing on the relevance target. Needed ahead of meeting:

Sep 7 2023, 9:31 PM · Movement-Insights

Aug 15 2023

kzimmerman added a comment to T344257: Requesting membership in analytics-privatedata-users group, sql_lab role, Kerberos Principal for Omari Sefu.

Approved as Omari's manager, thank you!

Aug 15 2023, 11:45 PM · SRE, SRE-Access-Requests

Aug 8 2023

kzimmerman moved T342703: Move generally-useful fields from gdi.country_meta_data to canonical_data.countries from Incoming to Backlog on the Movement-Insights board.
Aug 8 2023, 6:30 PM · Wikidata, Wikidata Analytics (Kanban), Movement-Insights

Jul 18 2023

kzimmerman moved T230091: Data exploration capabilities in Superset and Turnilo for Wiki project-level data from Incoming to Backlog on the Movement-Insights board.
Jul 18 2023, 6:29 PM · Movement-Insights
kzimmerman moved T298924: Superset - Product Analytics Canonical Dashboards, Reports, and Datasets from Incoming to Current epics on the Movement-Insights board.
Jul 18 2023, 6:29 PM · Movement-Insights, Epic, Product-Analytics
kzimmerman moved T201501: Develop a framework for measuring user retention from Incoming to Backlog on the Movement-Insights board.
Jul 18 2023, 6:28 PM · Movement-Insights, Product-Analytics
kzimmerman added a comment to T201501: Develop a framework for measuring user retention.

Per Neil: the draft framework doesn't have a default. and the recommendations aren't discoverable.

Jul 18 2023, 6:28 PM · Movement-Insights, Product-Analytics
kzimmerman moved T256050: Add dimensions to editors_daily dataset from Incoming to Backlog on the Movement-Insights board.
Jul 18 2023, 6:27 PM · Patch-Needs-Improvement, Movement-Insights
kzimmerman moved T277703: Decision & communication around filtering automated traffic from Key Product Metrics from Incoming to Backlog on the Movement-Insights board.
Jul 18 2023, 6:27 PM · Movement-Insights
kzimmerman moved T290042: Update Topic Datasets for Pageviews & Edits from Incoming to Backlog on the Movement-Insights board.
Jul 18 2023, 6:27 PM · Movement-Insights, Product-Analytics
kzimmerman moved T302468: Change Key metrics reporting timeline from fiscal to calendar year from Incoming to Backlog on the Movement-Insights board.
Jul 18 2023, 6:25 PM · Movement-Metrics, Movement-Insights

Jul 17 2023

kzimmerman set Due Date to Jul 31 2023, 7:00 AM on T338972: Baselines & Targets for Core FY23-24 Annual Plan Metrics.
Jul 17 2023, 9:37 PM · Movement-Insights

Jun 21 2023

kzimmerman triaged T336715: Investigate relation of Prefetch feature to increase in automated traffic and impact on unique devices as Medium priority.
Jun 21 2023, 7:29 PM · Movement-Insights, Research-Freezer, Data-Engineering
kzimmerman assigned T336715: Investigate relation of Prefetch feature to increase in automated traffic and impact on unique devices to Mayakp.wiki.

@MGerlach will consult on this. Assigning the investigatory task to @Mayakp.wiki.

Jun 21 2023, 7:29 PM · Movement-Insights, Research-Freezer, Data-Engineering

Jun 13 2023

kzimmerman created T338972: Baselines & Targets for Core FY23-24 Annual Plan Metrics.
Jun 13 2023, 4:09 PM · Movement-Insights

Jun 1 2023

kzimmerman added a comment to T337418: Global proportions outputs from Equity Landscape inputs.

Clarification per discussion with Jaime: this is related to the data that was compiled for the Equity Landscape Dashboard, but is not actually intended for the Dashboard. Instead, it's responding to the fact that we keep querying the same regional views for quarterly learning discussions, staff meetings, etc.

Jun 1 2023, 8:56 PM · Equity-Landscape
kzimmerman updated kzimmerman.
Jun 1 2023, 5:17 AM
kzimmerman added a member for Movement-Insights: Hghani.
Jun 1 2023, 5:15 AM
kzimmerman added a member for Movement-Insights: kzimmerman.
Jun 1 2023, 5:15 AM
kzimmerman edited projects for T326280: Walk through code for new data visuals with Irene and Maya, added: Product-Analytics (Kanban); removed Product-Analytics.
Jun 1 2023, 5:13 AM · Product-Analytics (Kanban)
kzimmerman edited projects for T326280: Walk through code for new data visuals with Irene and Maya, added: Product-Analytics; removed Product-Analytics (Kanban).
Jun 1 2023, 5:11 AM · Product-Analytics (Kanban)
kzimmerman closed T332811: Additional viz for Feb 2023 Pageviews metric as Resolved.
Jun 1 2023, 5:10 AM · Product-Analytics (Kanban)
kzimmerman closed T329585: Timeline visualization template as Resolved.
Jun 1 2023, 5:10 AM · Product-Analytics (Kanban)
kzimmerman closed T330780: Regional views for Foundation-level metrics as Resolved.
Jun 1 2023, 5:09 AM · Product-Analytics (Kanban)
kzimmerman updated the task description for T330780: Regional views for Foundation-level metrics.
Jun 1 2023, 3:16 AM · Product-Analytics (Kanban)

May 26 2023

kzimmerman added a comment to T337591: Transfer Neil Shah-Quinn's production access to new developer account.

Approved as Neil's manager

May 26 2023, 9:15 PM · SRE, SRE-Access-Requests

May 24 2023

kzimmerman added a comment to T322145: Requesting access to analytics-privatedata-users & Kerberos identity for Hghani.

@jbond Yes, confirmed, Hamid's contract end date is November 30, 2023. Thanks!

May 24 2023, 3:41 PM · SRE, SRE-Access-Requests

May 23 2023

kzimmerman updated kzimmerman.
May 23 2023, 11:11 PM
kzimmerman updated kzimmerman.
May 23 2023, 11:10 PM
kzimmerman added a member for Equity-Landscape: kzimmerman.
May 23 2023, 11:07 PM

May 18 2023

kzimmerman added a comment to T310732: "Source of truth" dataset for pageviews.

Removing this from the Pageview Data Loss epic, since this task also includes needs to account for other issues.

May 18 2023, 10:10 PM · Movement-Metrics, Movement-Insights, Data-Engineering, Foundational Technology Requests
kzimmerman removed a subtask for T311560: Pageview Data loss: T310732: "Source of truth" dataset for pageviews.
May 18 2023, 10:09 PM · Movement-Insights, Product-Analytics, Epic
kzimmerman removed a parent task for T310732: "Source of truth" dataset for pageviews: T311560: Pageview Data loss.
May 18 2023, 10:09 PM · Movement-Metrics, Movement-Insights, Data-Engineering, Foundational Technology Requests
kzimmerman closed T305990: Additional features in Pageview Loss calculation, a subtask of T311560: Pageview Data loss, as Declined.
May 18 2023, 10:08 PM · Movement-Insights, Product-Analytics, Epic
kzimmerman closed T305990: Additional features in Pageview Loss calculation as Declined.

Declining this task, as our emphasis has shifted to unique devices, and the amount of work needed would be high.

May 18 2023, 10:08 PM · Product-Analytics
kzimmerman updated the task description for T322145: Requesting access to analytics-privatedata-users & Kerberos identity for Hghani.
May 18 2023, 6:40 PM · SRE, SRE-Access-Requests
kzimmerman reopened T322145: Requesting access to analytics-privatedata-users & Kerberos identity for Hghani as "Open".

Hi all, we have re-hired Hamid Ghani. I am the hiring manager. Can you please re-enable his accounts? Thank you!

May 18 2023, 6:40 PM · SRE, SRE-Access-Requests

May 10 2023

kzimmerman added a comment to T330780: Regional views for Foundation-level metrics.

Thank you for the updated 2020 vs 2023 chart, Hua!

May 10 2023, 9:59 PM · Product-Analytics (Kanban)
kzimmerman reassigned T330780: Regional views for Foundation-level metrics from Miriam to HXi-WMF.
May 10 2023, 6:33 PM · Product-Analytics (Kanban)

May 8 2023

kzimmerman triaged T336084: [SPIKE] Model impact of User-Agent deprecation on top line metrics as High priority.
May 8 2023, 11:23 PM · Test Kitchen (Sprint 01), Data Pipelines (Sprint 14), Google-Chrome-User-Agent-Deprecation, Product-Analytics (Kanban), Data-Engineering

Apr 25 2023

kzimmerman added a comment to T330780: Regional views for Foundation-level metrics.

Thank you @HXi-WMF !

Apr 25 2023, 11:15 PM · Product-Analytics (Kanban)
kzimmerman closed T331365: February 2023 Wikimedia movement metrics as Resolved.
Apr 25 2023, 5:05 PM · Product-Analytics (Kanban)
kzimmerman closed T330948: February 2023 Wikimedia movement metrics as Resolved.
Apr 25 2023, 5:04 PM · Product-Analytics (Kanban)

Apr 19 2023

kzimmerman updated the task description for T330780: Regional views for Foundation-level metrics.
Apr 19 2023, 11:08 PM · Product-Analytics (Kanban)

Apr 17 2023

kzimmerman added a comment to T331359: Reader data for regional views.

@Mayakp.wiki can you update the unique devices with March data and let Hua know when that's ready?

Apr 17 2023, 10:29 PM · Product-Analytics (Kanban)
kzimmerman added a comment to T331361: Editor data for regional views.

@Iflorez can you update this with March data and let Hua know when that's ready?

Apr 17 2023, 10:28 PM · Product-Analytics (Kanban)

Apr 12 2023

kzimmerman added a comment to T330780: Regional views for Foundation-level metrics.

Thank you @HXi-WMF!

Apr 12 2023, 7:29 PM · Product-Analytics (Kanban)

Mar 29 2023

kzimmerman moved T332811: Additional viz for Feb 2023 Pageviews metric from Done to Doing on the Product-Analytics (Kanban) board.

Thank you @HXi-WMF !

Mar 29 2023, 6:44 PM · Product-Analytics (Kanban)
kzimmerman edited projects for T326280: Walk through code for new data visuals with Irene and Maya, added: Product-Analytics (Kanban); removed Product-Analytics.
Mar 29 2023, 6:40 PM · Product-Analytics (Kanban)
kzimmerman moved T332811: Additional viz for Feb 2023 Pageviews metric from Doing to Done on the Product-Analytics (Kanban) board.
Mar 29 2023, 6:36 PM · Product-Analytics (Kanban)

Mar 23 2023

kzimmerman updated the task description for T330780: Regional views for Foundation-level metrics.
Mar 23 2023, 8:51 PM · Product-Analytics (Kanban)

Mar 22 2023

kzimmerman added a comment to T329585: Timeline visualization template.

Thank you @HXi-WMF ! I find the Y-axis padding to be particularly helpful here - because it gives a better sense of how new & returning change relative to each other.

Mar 22 2023, 6:15 PM · Product-Analytics (Kanban)
kzimmerman updated the task description for T330780: Regional views for Foundation-level metrics.
Mar 22 2023, 6:11 PM · Product-Analytics (Kanban)

Mar 21 2023

kzimmerman updated subscribers of T328049: Investigate the effects of IP Masking on Data Eng systems.
Mar 21 2023, 11:18 PM · Data Pipelines (Sprint 12)
kzimmerman closed T331463: IE11 User and Traffic Analysis update 2023 as Resolved.
Mar 21 2023, 5:21 PM · Design-System-Team, Browser-Support-Internet-Explorer, Product-Analytics
kzimmerman moved T332205: Clarify analytics and metrics definitions around anonymous and temporary editors from Triage to Upcoming Quarter on the Product-Analytics board.
Mar 21 2023, 5:19 PM · Data-Engineering, Movement-Insights, Temporary accounts
kzimmerman triaged T332205: Clarify analytics and metrics definitions around anonymous and temporary editors as High priority.
Mar 21 2023, 5:19 PM · Data-Engineering, Movement-Insights, Temporary accounts
kzimmerman moved T332212: Major (API) versioning of Event Platform streams from Triage to Tracking on the Product-Analytics board.
Mar 21 2023, 5:14 PM · MW-1.41-notes (1.41.0-wmf.10; 2023-05-23), Patch-For-Review, Event-Platform (Sprint 14 A), Metrics Platform, Product-Analytics, Data-Engineering, WMF-Architecture-Team
kzimmerman moved T332621: Add log_search to monthly sqoop list from Triage to Tracking on the Product-Analytics board.
Mar 21 2023, 5:11 PM · Data-Engineering-Icebox, Data-Engineering, Data Pipelines, Product-Analytics
kzimmerman moved T330780: Regional views for Foundation-level metrics from Next 2 weeks to Doing on the Product-Analytics (Kanban) board.
Mar 21 2023, 5:10 PM · Product-Analytics (Kanban)

Mar 20 2023

kzimmerman added a comment to T303655: Decision on mobile app Commons pageviews.

Impact of this is low on high level metrics, so we would not prioritize this work from the high-level metrics perspective.

Mar 20 2023, 6:39 PM · Product-Analytics
kzimmerman added a comment to T277703: Decision & communication around filtering automated traffic from Key Product Metrics.

We are increasingly *also* reporting on user pageviews, because we've seen increases in automated traffic since 2022. However, we only split out automated traffic in 2020, so for longer-term historical views we still need to include automated traffic.

Mar 20 2023, 6:25 PM · Movement-Insights
kzimmerman closed T294954: Investigate drop in Page Previews data as Declined.
Mar 20 2023, 6:23 PM · Product-Analytics (Kanban)
kzimmerman closed T327943: Run data visualization code on Jupyter notebooks on statbox as Resolved.

Thank you @HXi-WMF!

Mar 20 2023, 6:15 PM · Product-Analytics (Kanban)