PROOF LEDGER

Every number on this site, and what it can claim.

A result I can show is not always a result I caused. Each figure below carries its evidence state, the pages that show it, and the boundary that limits it. The list is read from the same records the pages use, so it cannot say more than they do.

39 figures, ordered within each role from the strongest claim about my work to the weakest.

Customer systems

T-Mobile · Aug 2007 - Aug 2012

Customer systems: figures, what each measures, its evidence state, and where it appears
Figure	What it measures	Evidence	Appears on
8 to 10 seconds	shorter average call length	Program result	Experience
16K+	dealer-to-care calls removed per month	Program result	Experience
Under 2 years	payback on QuikView	Program result	Experience

Where this stopsQuikView program outcomes, measured across the customer, billing, and device data the program unified. The early equipment-installment work here led into the device-program role that follows.

Device programs

T-Mobile · Aug 2012 - Dec 2015

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Device programs: figures, what each measures, its evidence state, and where it appears
Figure	What it measures	Evidence	Appears on
11.3M	JUMP! enrollees by Q2 2015	Program result	Home JUMP! role Experience
30%	faster member upgrades	Program result	Home JUMP! role Experience
~20%	lower device-program costs	Program result	Home JUMP! role Experience
$1.3B	device-program revenue, grown from about $800M	Program result	Home JUMP! role Experience
~60%	attachment	Program result	JUMP! role Experience
$5.2B	annual equipment-installment ecosystem the programs operated inside	Context	JUMP! role Experience

Where this stopsMulti-year program outcomes from several teams. The revenue growth is device-program revenue, and the $5.2B figure is the annual equipment-installment ecosystem those programs operated inside.

T-Mobile ONE

T-Mobile · Dec 2015 - Jan 2017

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T-Mobile ONE: figures, what each measures, its evidence state, and where it appears
Figure	What it measures	Evidence	Appears on
851K	branded postpaid phone net adds in Q3 2016	Company result	Home T-Mobile ONE role Experience
~75%	of new postpaid accounts activating on ONE by October 2016	Company result	Home T-Mobile ONE role Experience
8	functions aligned for the tax-inclusive rollout	Scope	Home T-Mobile ONE role

Where this stopsT-Mobile reported the net adds and positive sequential ARPU, and named ONE as one of several primary growth drivers for the quarter alongside iPhone 7 and prepaid migrations. The net-add and adoption figures are company results the work contributed to.

Billing & Benefits

T-Mobile · Jan 2017 - Mar 2022

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Billing & Benefits: figures, what each measures, its evidence state, and where it appears
Figure	What it measures	Evidence	Appears on
43%	fewer billing-related care calls	Program result	Home Billing & Benefits role Experience
+204%	YoY one-time payment completion	Program result	Home Billing & Benefits role Experience
+76%	recurring payment setup	Program result	Billing & Benefits role Experience
+23%	customer lifetime value in the first 12 months	Program result	Home Billing & Benefits role Experience
99%	of the time, equipment-installment charges and eligible promotions reached the bill together	Program result	Experience
20 points	higher NPS for early fully transitioned Sprint-to-T-Mobile cohorts than for non-migrated customers	Cohort result	Experience
90M	monthly authenticated interactions across web, app, paper, IVR, care, and retail	Scope	Experience

Where this stopsThese are Billing and Benefits program outcomes, measured across the whole program. One-time payment completion compares completed payments year over year; it is not a conversion rate.

Prime engagement

Amazon Prime · Apr 2022 - Sep 2023

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Prime engagement: figures, what each measures, its evidence state, and where it appears
Figure	What it measures	Evidence	Appears on
+23%	renewal outcome in the broader lifecycle work	Program result	Home Prime role Experience
+17%	higher shopping activity	Program result	Home Prime role Experience
4 weeks → 4 hours	approximate localized customer experience build time	Program result	Home Prime role Experience
26	countries served	Scope	Home Prime role Experience
30M+	monthly benefit uses	Scope	Prime role Experience
1B+	impressions	Scope	Prime role Experience
130+	people across product, engineering, design, data science, and analytics	Scope	Home Prime role Experience
5	Senior PMTs, on a team grown from one	Scope	Prime role
200M+	paid-member ecosystem the platform served	Context	Prime role Experience
~70%	stronger 60-day yield for members using three or more benefits	Association	Prime role
$139	US annual Prime price after the February 2022 increase from $119	Cited fact	Prime role

Where this stopsCountry teams owned the local commercial outcomes. Renewal and shopping are program-level results measured across the broader lifecycle work, and the 200M+ figure is the size of the paid-member ecosystem the platform served.

Across the career

T-Mobile and Amazon Prime, 2007 to 2023

Across the career: figures, what each measures, its evidence state, and where it appears
Figure	What it measures	Evidence	Appears on
16 years	at T-Mobile and Amazon Prime	Scope	Experience
3 promotions	to Senior PM, plus 3 interns converted to full-time	Scope	Experience

Independent research

Inputs to the briefs, never results

Read the briefs

Independent research: figures, what each measures, its evidence state, and where it appears
Figure	What it measures	Evidence	Appears on
$25	per month, the Supabase Pro starting price	Cited fact	Supabase brief
$10	in monthly compute credits included with paid plans	Cited fact	Supabase brief
$10	per month, the starting price of each additional project	Cited fact	Supabase brief
$599	the Team plan, which adds governance, compliance, support, and retention features	Cited fact	Supabase brief
48	combinations of payment mechanism, customer state, and recovery program in the churn model	Model	Churn brief Briefs
20	pairings of user and limit structure in the free-tier model	Model	Free tier brief
20 and 60 percent	discounted-order shares the engagement model uses as operating thresholds	Heuristic	Engagement brief

Where this stopsThese figures are cited prices, properties of the models, and chosen thresholds. None of them is an outcome, and the briefs keep their model outputs as hypotheses to test.