Approval Hub: End-to-End Product Journey

From problem discovery to enterprise-wide impact — a case study in product leadership

0→1

Product Build

6+

Source Systems

10K+

Users Impacted

$18M

Target Savings

ProblemDiscoveryDataDeliveryResultsFuture
01 / The Problem
The Initial Request

Executive Pain Point

"My inbox is like spam." — Executives couldn't keep track of approvals spread across multiple systems. They were missing important approvals that needed immediate followup.

0 hours wasted.

$0M lost annually. Fragmented approvals killing productivity.

Before: The Chaos
Fragmented notification chaos - multiple overlapping alerts from different systems

6+

Systems

Spam

Inbox Feel

Missed

Approvals

After: ME@Inbox Integration
MobileWeb
ME@Inbox In-App Approval Experience - unified approval list with detail view and action buttons

In-App

Approvals

2.1M+

Users

Live

in ME@

Designed every detail — button placement, copy, UX flows — in close collaboration with design team

What came next?

User research with operational approvers revealed deeper problems...

72K

Emails/year per user for single contract approvals

Excel

Manual tracking in spreadsheets to avoid duplication

Unused

Phone apps existed but nobody used them

Principal Moment

Quantified the hidden cost through user research: operational approvers spend 2hrs/day on approvals. At $30/hr across 1,000 approvers and 300 working days—that's $18M annual productivity cost. This framing secured executive sponsorship.

Scroll to see the discovery
The Scale of Impact

Quantifying the Problem

User research revealed the true scale of approval inefficiency.

Time Spent on Approvals
0hours/year

Operational approvers spend an average of 2 hours per day tracking and processing approvals across multiple fragmented systems.

Productivity Cost
$0M/year

At an average of $30/hr across 1,000 approvers, fragmented approvals drain millions in productivity.

Executive Impact

Approvals pending in millions of dollars

For executive leaders, the same problem compounds at a higher level. Pending approvals represent millions of dollars in procurement decisions sitting in queues—leading to delayed vendor contracts, missed opportunities, and business loss. Time spent tracking approvals is a serious issue at every level of the organization.

10%

$1.8M

Even a 10% efficiency improvement saves millions annually.

25%

$4.5M

Quarter improvement in approval efficiency compounds across the org.

60%

$10.8M

Our target: 5-day → 2-day approval times = 60% time reduction.

Principal Moment

This quantification came directly from user research—interviewing 15-20 stakeholders across different approval domains. Understanding the 2-hour daily burden turned a UX problem into an $18M business case that leadership couldn't ignore.

Leadership Interview Insights

James Bird & Stuart Black on executive approval needs

"Email is a great tool for drawing users into our systems but could be less noisy. For users receiving multiple requests per day, a digest email communicating open items and the priority of open requests would help them understand what's needed."

JB
James Bird

Leadership

"Requests should be prioritized based on financial risk and age. When possible, call out risky or sensitive items like contracts so they receive attention quickly."

SB
Stuart Black

Leadership

Priority by Risk & Age

Financial risk assessment combined with aging—relating to a 'burning platform'

Responsive End-to-End

Allow reviews and approvals on executive's phone or iPad—no more waiting for desk time

Single Hub View

Live view of requests across all systems—what's open, priority, and aging in a single list

SLA Tracking

Show aging based on submission and last update—SLAs range from 72hrs to 10 days for legal review

Target User Segments — Initially identified for GNFR, expandable across Walmart

Business SupervisoryFinanceOperational ProcurementAccountingLegalGPSTaxEAMSupplier Management

Channel Solution Evaluation

Before building, I questioned: Why aren't emails working?

Principal Moment

While engineering was setting up systems, I did the analytical groundwork—evaluating every possible channel to understand constraints and opportunities. Me@Campus and Me@Walmart don't reach all customers and are limited to US markets. This analysis drove our hybrid strategy.

Me@Inbox

Pros

  • +Existing channel
  • +Easy distribution

Cons

  • -Limited to US, CAN
  • -Fixed Design and UX scope
  • -High dependency on their roadmap

Me@Mini-App

Pros

  • +Existing channel
  • +Easy distribution

Cons

  • -Limited to US, CAN
  • -Fixed Design and UX scope
  • -Difficult timelines
  • -New designs needed per app integration
  • -High dependency on their bandwidth

Email

Pros

  • +Existing channel
  • +Easy distribution
  • +No additional development
  • +Works across all Walmart markets

Cons

  • -Easy to miss notifications
  • -No consolidation functionality
  • -Users must create filters
  • -Limited UX scope

Approval Hub

Pros

  • +Can deploy across all Walmart markets
  • +Full control on UX and Functionality
  • +Scalable to future needs

Cons

  • -Becomes another application

Strategic Decision: Build Approval Hub as the core platform with full UX control, while leveraging Me@Inbox for distribution in US/CAN markets. This hybrid approach gives us global scalability while meeting users where they already are.

Prioritization Framework

Beyond standard RICE scoring, we evaluated features against multiple strategic parameters:

Stakeholder Agreement

Executive and team alignment on priority

Business Complexity

Technical and process complexity to implement

Application Integration

Number of systems to connect (Coupa, SAP, etc.)

Impact by Users

Number of approvers affected

Impact by Cost

Potential savings from productivity gains

Scalability

Can this solution extend to other products?

Prioritization Matrix (RICE)

Principal Moment

Data-Driven Product

Measurement Framework

14 custom metrics across 5 categories to measure adoption, performance, and business impact

Source Application

3 metrics

Total Requests per SourceVolume tracking
Count of approval requests from Source A
Action Rate per SourceEngagement by app
(Approvals + Rejects) / Total Requests × 100
Avg Approval Time per SourcePerformance benchmark
Σ(Time Out - Time In) / Request Count
Total Requests per SourceAction Rate per Source+1 more

Adoption Metrics

2 metrics

Adoption per SourceApp-level adoption
Users Interacting / Total Source Users × 100
Overall Adoption RatePlatform efficacy
Active Users / Target Users × 100
Adoption per SourceOverall Adoption Rate

Retention Metrics

2 metrics

Retention by SourceStickiness by app
Repeat Users (14d) / Total Unique Users
Overall RetentionPlatform stickiness
Multi-interaction Users / All Users
Retention by SourceOverall Retention

Team Performance

4 metrics

Approvals per TeamTeam workload
Count of approve/reject by team
Avg Time per TeamTeam efficiency
Σ Team Approval Time / Team Actions
Pending per TeamBottleneck detection
Open requests assigned to team
Individual PerformanceLoad balancing
Actions per team member
Approvals per TeamAvg Time per Team+2 more

Impact Metrics

2 metrics

ReachVisibility
Notifications Read / Notifications Sent
Approval Time DeltaTime savings
(Before - After) / Before × 100
ReachApproval Time Delta
AI/ML Opportunity

Data Foundation for Intelligent Approvals

The metrics framework creates a rich dataset for training ML models to predict approval times, detect bottlenecks, and enable smart routing.

Predict approval times & alert on anomalies
Detect bottlenecks by team & application
Optimize routing & enable mass approvals

Key Data Parameters for ML

⏱️
Approval Time
Historical time-to-approve patterns
📱
Application Type
Coupa, SAP, iP2P behavior differences
💰
Request Value
$ amount correlation with approval speed
🏢
Department
Team-specific approval patterns
📋
Request Type
PO, Invoice, Contract variations
👤
Approver History
Individual approval behavior
Principal Moment

Designed the measurement framework upfront - not as an afterthought. This enables data-driven iteration and creates the foundation for AI/ML capabilities in the product roadmap.

03 / The Journey

Navigating Dependencies & Stakeholders

When platform team release cycles meet stakeholder expectations.

2months

MVP1 delivery

3months

Setback from ME@ transition

1quarter

MVP2 rebuild

Biggest Challenge

ME@ Platform Transition

ME@ V2 was the future, so we built for it. Then they changed plans and fell back to V1—we had to build twice.

Impact

Lost 3 months to ME@ platform transition and withdrawn version support

How I Managed It

Pivoted quickly. The solution was modular so we only had to re-scope for V1—reducing rework while ensuring core functionality.

Principal Moment

Keeping the Lamp On

When the project was shut down, I didn't give up. I kept working with dependency teams since they were the reason for our delay. I kept selling it to finance teams, tax teams—gathering interest and information for when the moment came.

When John Furner couldn't find his approval request and triggered a sequence of emails to VPs, Approval Hub was revived. Someone told him about it, and his team suggested more applications to be onboarded. I was already ready.

The Catalyst

The Furner Moment

The Trigger

John Furner couldn't find the request he needed to approve. After he did, he had to switch between systems and had no access to his account.

The Impact

This triggered a sequence of emails to VPs. Approval Hub was revived and prioritized with more applications suggested by his team to be onboarded.

My Readiness

I was already ready because I had secretly kept it running in the backend—working with dependency teams, selling to finance and tax teams.

Cross-Functional Collaboration

Context:

Engineering wanted Concur first—it was already in ME@ and seemed like a quick win.

How I Collaborated:

Showed data on notifications and flows proving that without notification control, we'd spam all users. Pilot was okay, but enterprise rollout would be a mess.

Result:

Won the argument for notification control first. Quick win isn't a win if it damages user trust.

Journey Timeline

MVP1

MVP1 Built

Built integration of source applications with ME@ and navigation to source in 2 months

Setback

ME@ V2 → V1 Pivot

Lost 3 months when ME@ fell back from V2 to V1

Persistence

Kept the Lamp On

When shut down, kept working with dependency teams and selling to finance/tax teams

Alignment

Win Through Reasoning

Aligned Engineering on notification control before Concur rollout

Catalyst

The Furner Moment

CEO couldn't find his approval, triggered VP emails, project revived

MVP2

MVP2 with In-App Approvals

New research, design, and data integrations built in 1 quarter

Principal Moment

How I Collaborate

Bridging business, design, and engineering through structured collaboration

With Engineering

1

Daily Cadence When Required

Sync only when needed, respecting engineering focus time

2

Deep Technical Collaboration

Work through data sources, fields, APIs, and design interactions together

3

Clear Documentation

Documenting flows and user stories on Jira with full context

4

4iTB Success/Blocker Framework

Bridging business and engineering with structured reporting

5

Recognize Individual Contributions

Credit team members for pushing through challenging times

6

Hands-On Problem Solving

Sat with engineering on APIs and vendor solutions—I understand tech to make quick decisions while giving engineering freedom

With Design

1

Early Involvement

Involve design very early in discovery and research phases

2

Feasibility Loops

Work through feedback loops and UX options, involving engineering for feasibility checks

3

Bridge Business & Engineering

Connect design and business early, then design and engineering during delivery

4

Lead Time Buffer

Push design teams to deliver experiences with multiple ideations, giving engineering at least 1 month lead time

Business
Design
Engineering

Connecting the triad through structured collaboration

04 / Results

Results & User Feedback

Processing 15K requests weekly. Users love it.

Currently Processing

0

requests / week

300+ active users6 systems live5 global regions

Real User Feedback

"The approval process is very seamless. I love how clean the system is."

Director, Controllership — MVP2 Launch

15K

Requests processed weekly

300+

Active users globally

6

Systems integrated

5

Global regions

Target KPIs

Goals we're working towards

target

60%

Approval time reduction

5-day → 2-day cycle

target

80%

Email volume reduction

Via notification consolidation

target

1,000+

Active approvers globally

Full rollout

User Adoption Journey

Tracking the complete user journey from notification to action

1

18

MVP1 Pilot Users

2

300

MVP2 Initial Launch

16x growth
3

6

Applications Integrated

Live now
4

5

Regions Expanded

Global

Principal Moment — Scaling Impact

Started with 18 pilot users, scaled to 300+ in MVP2 initial launch, now processing 15K requests/week. Each phase taught us what users actually need.

05 / The Evolution

The Product Evolution

From 2-month MVP to global platform in one year.

Built MVP1 in 2 months. Lost 3 months to ME@ transition. Rebuilt MVP2 in 1 quarter with fresh research.

Phase 2 — LIVE

Currently in production

Live

In-App Approvals

Approve/reject directly within ME@Inbox without switching systems

Live

Notification Control

Users can manage which notifications they receive and how often

Live

Multi-Application Support

Coupa, SAP, iP2P, iCatalog, and more integrated

Live

Navigation to Source

One-click deep links to source system for complex approvals

Web - Navigate to Source
MVP1 Navigate to Source - Web
Open GNFR
Mobile - Navigate to Source
MVP1 Navigate to Source - Mobile
1

MVP1: Navigate to Source

Built in 2 months

Integrated source applications with ME@Inbox in just 2 months. Users see approval details and navigate to source system to take action. Reduced context switching while proving the concept.

Delivery

2 Months

Pilot Users

18 users

Integration

4 Systems Live

Setback

Lost 3 months due to ME@ platform transition—they fell back from V2 to V1. Had to rebuild, but modular design meant only re-scoping, not starting over.

Platform Influence

Features I championed that were adopted by ME@Inbox for ALL inbox users:

Custom FiltersRemindersSource IconsTime Remaining Badges

ME@ team now wants to partner with us in their revamp—positioning Approval Hub as a core feature.

Principal Moment — Platform Partnership

Positioned our requirements as win-win for ME@Inbox team—identified opportunity areas and drove collaboration. Now they want to partner with us in their revamp and have Approval Hub as a core feature.

09 / FY27 Roadmap

The Path Forward

Three-phase roadmap to increase adoption, stickiness, and organizational impact

Aligned to Walmart's Big 6 Strategic Priorities
1

Phase 1: Foundation

Q1-Q2 FY27

Onboard 5+ Applications

Expand integration coverage to streamline approvals across more enterprise systems

ALIGNS TO:

Increase Delivery Speed
Accelerate Platform Migrations

Enhanced Data & Actions

More data customizations, comments, attachments for richer approval context

ALIGNS TO:

Increase Delivery Speed
2

Phase 2: Platform Scale

Q2-Q3 FY27

Self-Onboarding

Empower business teams to onboard applications and streamline approvals independently

ALIGNS TO:

Increase Delivery Speed
Accelerate Platform Migrations

Custom Approvals

Platform to generate approval flows for any process—stores, people, internal teams

ALIGNS TO:

Increase Delivery Speed
Automate Global Supply Chain
3

Phase 3: Intelligence

Q3-Q4 FY27

Smart Prioritization

Rule-based and usage-based recommendations to optimize approval workflows

ALIGNS TO:

Reinvent with AI

Squigly Integration

Conversation-based approvals for natural, chat-driven workflows

ALIGNS TO:

Reinvent with AI

Approval Analytics

Team and application-level analytics for visibility and optimization

FY27 Objective

Drive enterprise-wide approval transformation through increased adoption and stickiness

Subject to funding & prioritization

Increased Adoption

Expand to more teams and use cases

Enhanced Stickiness

Make Approval Hub indispensable

Org-Wide Impact

Drive visibility and value

Approval Hub by Nishant Chintalapati