PROJECT 02 / BATTERY MFG. PRACTICE V2

4680 Battery Ramp-Up & Supplier Readiness Strategy

Designing a launch-control system that connects suppliers, readiness, tooling, capacity, quality and validation into one measurable ramp to volume.

36
Supplier partners
80.0%+
On-time shipments
8
High-risk mono parts
16
PPAP-approved
7
Go-live gate plan

Engagement across cells, casing, closure and component partners to accelerate readiness, reduce risk and create a repeatable path to volume.

Tesla 4680 battery cell Reference cell
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The problem behind every battery launch

Battery ramp-up is fail-fast because of one weak link. Our framework reduces risk through seven connected gates.

Disconnected readiness

Every function owns a piece. No single source of truth.

Approved but not effective

Commitments exist, but execution gaps create variability.

Hidden risks

Parts, process or tooling risks surface too late.

Low visibility

Reactive status checks lead to late fixes.

Critical to launch

A delay in one link compromises cost, yield and energy.

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OUR SOLUTION

A launch-control system, not just a tracker

We built a system that connects all critical levers to a shared readiness plan—so decisions are earlier, corrective actions are automatic and risk is contained.

One readiness model

Unified gate definition across functions, synced to suppliers.

Seven-gate roadmap

Stage-gated plan with entry/exit conditions.

Risk & mitigation built in

Proactive risk scoring, triggers and CAPA on every gate.

Real-time live improvements

Every gate tracked, issues surfaced early.

Capacity verified by data

Live capacity assessment for demand and ramp scenarios.

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The seven-gate launch roadmap

A structured path from concept freeze to scalable volume.

01
Design Freeze
Requirements locked in
02
Supplier Qualification
Capability & compliance validated
03
Tooling Readiness
Tool build & tryout sign-off
04
Pilot Build
Initial build & process proven
05
Validation & PPAP
All validation & PPAP completed
06
Yield Stabilisation
Process window lock & yield performance
07
Volume Ramp
Scale-up with stable yield and cost
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Readiness is measured across six critical dimensions

A single rollup score tracks the real readiness level and highlights the lowest-scoring areas.

Tooling readiness25%
Capacity verified25%
Quality control20%
Material readiness15%
Validation progress10%
PPAP & documentation5%
READINESS DASHBOARD (SCORE ROLL-UP)
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Focus on what can delay the entire launch

The moment risks show up, all attention locks to them—so impact is eliminated, not just recorded.

RISK & PRIORITISATION TRACKER (TOP RISKS)
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What this approach makes possible

Get the real readiness, not just the reported status.
Know where to intervene and why.
Make better go/no-go decisions with confidence.
Protect your timeline, quality and returns.
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Project assets

Core tools, models, frameworks and reports that power this engagement.

PPAP & VA Level Template
Executive Dashboard Template
Readiness Scoring Model (6 Dimensions)
Risk Heat & Action Tracker
Technical & Supplier Report Pack
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Risk should follow criticality, not just the score.

We segment risk by impact and likelihood, then govern it through a simple cadence with clear escalation rules.

Risk matrix (impact × likelihood)

Low likelihoodMedium likelihoodHigh likelihood
High impactTier 2Tier 1Tier 1
Medium impactTier 3Tier 2Tier 1
Low impactTier 3Tier 3Tier 2

Governance cadence

Daily recovery huddle

Review critical risks, owners, and 24–48h actions.

Twice-weekly supplier review

Track commitments, risks, and evidence updates.

Gate readiness review

Validate PPAP, live tests, and capacity proofs.

Executive escalation

Remove cross-functional blockers and re-prioritise.

Tier 1 - Critical

High impact & medium/high likelihood.
Escalate immediately, daily tracking and executive-owned actions.

Tier 2 - Elevated

Medium impact or likelihood.
Twice-weekly tracking, mitigation plan with clear due dates.

Tier 3 - Managed

Low impact & low/medium likelihood.
Monitor and close through standard cadence, documented and verified.

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FINDINGS & INSIGHTS

What the data and reviews tell us.

Insights from cross-functional reviews and supplier data analysed across seven gates.

01
Overall readiness is moderate, not launch-secure.

Readiness sits at 80.0%. Several critical items are not yet proven at scale.

02
Capacity is the weakest readiness dimension.

Capacity verification and yield stabilisation lag behind all other dimensions.

03
Risk is concentrated in a meaningful minority.

8 high-risk parts and 16 PPAP-approved items require focused attention.

04
PPAP approval is incomplete and uneven.

16 parts approved vs. a longer tail still pending evidence.

05
Readiness must be interpreted with criticality.

Low-visibility issues on critical parts carry more launch risk than high-visibility gaps.

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RECOMMENDATIONS

A phased path to launch control.

Focus on what moves risk, not just what's easy to track.

PHASE 01
Data & ownership baseline

Establish a single source of truth for parts, gates, risks, and commitments.

DELIVERS

Trusted data, clear owners, and visible risk inventory.

PHASE 02
Critical recovery

Attack Tier 1 risks and weakest dimensions with a tight recovery plan.

DELIVERS

Risk reduction, constraint removal and early stability.

PHASE 03
Gate evidence

Close PPAP gaps and complete live tests to generate irrefutable proof.

DELIVERS

Evidence-backed readiness and gate-level confidence.

PHASE 04
Ramp control

Stabilise yield, monitor in real time, and tune the ramp with control limits.

DELIVERS

Predictable ramp, protected timeline, and sustainable performance.

Focus on criticality over just scores.
Make commitments visible and owned.
Close the loop with evidence, not intent.
Decide with data, act with discipline.
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DETAILS & CREDIBILITY
Deliverables
  • Supplier-readiness workbook (Excel)
  • Power BI-style dashboard (mock-up)
  • Ramp-up roadmap and action plan
  • Risk matrix and escalation framework
  • Complete project explanation (PDF)
Skills demonstrated
  • Cross-functional system design
  • Data modelling & KPI definition
  • Supplier risk assessment
  • Readiness scoring & validation
  • Strategic analysis & communication
Limitations
  • Simulated and anonymised data
  • Not connected to live systems
  • Scope limited to available inputs
  • Subject to assumptions stated
  • For portfolio and learning only
Credibility note

This case study uses simulated and anonymised data to demonstrate method, rigour, and communication. It was not produced for, commissioned by, or endorsed by Tesla, Inc. or any named supplier.

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CLOSING

A launch-control system for confident ramp decisions.

When readiness is measured, risk is governed, and evidence is trusted, ramp-up becomes predictable - not risky.

Go beyond the overview. Explore the complete project documentation, process, and supporting files on GitHub.

Thank you for reading.

About this project

An independent case study by SVD using simulated and anonymised data.

Not affiliated with Tesla, Inc. or any named supplier.

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