# LeanTechPro

>  Case studies, guides, and field notes on lean delivery, visual management, problem-solving, and AI-era engineering leadership.

- [Home](https://leantechpro.com/)
- [The Delivery Playbook (newsletter)](https://leantechpro.com/newsletter/): Free weekly newsletter for engineering leaders. One diagnosis, one countermeasure, one real case.
- [Delivery Flow Scorecard](https://leantechpro.com/delivery-flow-scorecard/): Free 2-minute diagnostic: 10 questions, instant score, your #1 bottleneck.
- [Workshop](https://leantechpro.com/workshop/): Half-day delivery workshop for leadership teams.
- [About](https://leantechpro.com/about/)
- [What clients say](https://leantechpro.com/testimonials/)

## Articles
- [The Real Cost of AI Code](https://leantechpro.com/real-cost-of-ai-code/): Wrong assumptions break production faster than bad syntax. A 10-minute brief review stops them before they start.
- [We use AI. So why is the release calendar the same?](https://leantechpro.com/we-use-ai-so-why-iaai-release-calendar-gap/): The speed is real. It pools in a queue between 'code done' and production. Here's how to find it, measure it, and answer the CEO.
- [Non-RFT Is Eating Your Team's Capacity](https://leantechpro.com/non-right-first-time/): Eight of ten fixes bounced. Three months later, none did.
- [Why Engineers Don't Act on Cloud Costs](https://leantechpro.com/why-engineers-dont-act-on-cloud-costs/): Instead of the usual training and dashboards, you need standards and weekly rituals
- [The Year Nobody Could See](https://leantechpro.com/value-stream-mapping-delivery-flow/): The team drew the new flow. That is the whole difference.
- [The Twenty Minutes That Never Came Up](https://leantechpro.com/what-your-dashboard-misses/): One hour sitting next to an engineer told me more than any dashboard or retro had.
- [Your Support Queue Is a Defect Report](https://leantechpro.com/escalation-rate-defect-report/): A tech support team escalates 20% of its tickets. Only some of them should be heading to the devs.
- [44% of their defects were not defects](https://leantechpro.com/false-defect-rate-root-causes/): Almost half of what one team reported was not a bug. The six causes behind it, and the one rule that stopped testers from guessing.
- [+45% satisfaction from 30 phone calls](https://leantechpro.com/voice-of-customer-45-satisfaction/): What thirty same-day phone calls found that no dashboard could see.
- [Release Failures Hit Zero. Then They Bounced Back](https://leantechpro.com/release-failure-root-cause/): Four months of release data, and the month the gains slipped back.
- [Engagement Is a Performance Signal, Not an HR Survey](https://leantechpro.com/voice-of-the-employee/): The same instrument, run twice. The score moved, but some of the problems it surfaced are still open.
- [Management Obeya: How an IT Services Team Built Their Own War Room](https://leantechpro.com/management-obeya-case-study/): An IT services agency director built a management obeya to run his business from one room. Seven boards, weekly sessions, and structured problem-solving replaced opinion-based meetings.
- [From 24% to 55% On-Time Delivery: A Project Obeya Room Case Study](https://leantechpro.com/project-obeya-room-case-study/): A BI team managing 18 projects built an obeya room and improved on-time delivery from 24% to 55% in 3 months. Full case study with three PDCAs and measured results.
- [Lead Time vs Cycle Time: Complete Guide for Tech Teams](https://leantechpro.com/lead-time-vs-cycle-time/): Lead time measures the time from request to delivery. Cycle time measures the duration of a recurring process. Learn how to use both.
- [How We Halved DevOps Deployment Lead Time](https://leantechpro.com/devops-lead-time-reduction-case-study/): A DevOps team halved its infrastructure deployment lead time to under 30 days. Value stream mapping revealed half the time lost in one queue. Root causes and fixes inside.
- [How a 15-Person COBOL Team Cut Defects 91% in 60 Days](https://leantechpro.com/cobol-defect-reduction-case-study/): How a 15-person COBOL team cut defects from 93 to 8 in 60 days. The diagnostic, the practices, and the numbers from a banking software case study.
- [Engineering Team Performance: A Non-Technical Founder’s Guide](https://leantechpro.com/engineering-team-performance-non-technical-founder/): You’re spending $20K/month on engineers but can’t tell if it’s working. Here are the exact signals non-technical founders should watch, no coding required.
- [Your AI Tools Aren’t Delivering. The Problem Isn’t the Tools](https://leantechpro.com/ai-tools-not-delivering/): AI tools made your developers faster. But delivery got slower. A diagnostic framework for CTOs to find where AI gains disappear in the delivery pipeline.
- [Lean Testing Case Study: 24% Productivity Gain in Three Months](https://leantechpro.com/lean-testing-case-study-24-productivity-gain-three-months/): Lean Testing case study: a 13-person billing test team raised productivity 24%, cut diagnostic errors from 15% to 10.5%, and improved client satisfaction.
- [Your Delivery System Is Part of Your Product](https://leantechpro.com/your-delivery-system-is-part-of-your-product/): Delivery capability isn’t separate from your product. It’s part of it. Customers experience speed, reliability, and support, not just features. Toyota and Amazon understood this decades ago.
- [What Is Lean Testing?](https://leantechpro.com/what-is-lean-testing/): Lean Testing applies Lean principles to software testing. Learn the principles, see a real case study with 200% productivity gain, and get started today.
- [Lean Testing at Sopra Steria: How We Tripled Testing Productivity in 3 Months](https://leantechpro.com/lean-testing-in-action-how-we-tripled-testing-productivity-in-3-months/): Lean Testing case study: how a 15-person testing team tripled productivity and cut false defects from 44% to 4% in 3 months using visual management and PDCA.
- [How to Scale Customer Support Without Just Hiring More People](https://leantechpro.com/how-to-scale-customer-support-without-just-hiring-more-people/): Hiring more support agents won’t fix your backlog. Learn the Lean approach to scaling customer support by fixing flow, not adding headcount. Real case study.
- [When Agile Coaching Doesn’t Deliver: A Results-Based Alternative for Tech Leaders](https://leantechpro.com/when-agile-coaching-doesnt-deliver-a-results-based-alternative-for-tech-leaders/): Why do 84-96% of Agile transformations fail? They optimize ceremonies, not work. Learn the four practices that drive measurable results for tech teams.
- [LLM Cost Optimization: How to Reduce API Spending by 40-60%](https://leantechpro.com/llm-cost-optimization-reduce-api-spending/): Most LLM teams waste 40-60% of their AI budget on operational inefficiencies. 6 patterns killing your budget and how to fix each one.
- [Voice Of Customer (VoC): A Complete Guide for Tech Teams](https://leantechpro.com/voice-of-customer-voc-a-complete-guide-for-tech-teams/): What is Voice of Customer (VoC)? Learn how tech teams use VoC to prioritize work. Case study: IT team improved satisfaction 45% in 3 months using Lean.
- [What Is an Obeya Room? A Complete Guide With Examples](https://leantechpro.com/what-is-an-obeya-room-a-complete-guide-with-examples/): What is an Obeya Room? A visual management space where cross-functional teams align, solve problems, and run delivery. Three types, six animation practices.
- [Value Stream Mapping: The Missing Piece in Your ARTs](https://leantechpro.com/value-stream-mapping-the-missing-piece-in-your-arts/): Discover how value stream mapping transformed a tech organization’s ARTs from rigid silos to an agile powerhouse. A practical guide to optimizing flow without restructuring.
- [Value Stream Mapping for Software Teams: A Complete Guide With Examples](https://leantechpro.com/value-stream-mapping-for-software-teams-a-complete-guide-with-examples/): Value Stream Mapping transforms software delivery by eliminating waste, optimizing flow, and aligning teams for faster customer results.
- [The PDCA Cycle (Deming Cycle): A Complete Guide With Examples](https://leantechpro.com/the-pdca-cycle-deming-cycle-a-complete-guide-with-examples/): Learn the PDCA Cycle (Deming Cycle) with real tech examples. See how teams reduced defects by 91% and false bugs by 83% using Plan-Do-Check-Act.
- [A3 Problem Solving: A Complete Guide (With Template & Examples)](https://leantechpro.com/a3-problem-solving-a-complete-guide-with-template-examples/): A3 Problem Solving is a structured one-page method from Toyota for root cause analysis and continuous improvement. Includes implementation guide, template, and real-world examples.
- [The 5 Whys: A Root Cause Analysis Guide (With Examples)](https://leantechpro.com/5-whys-root-cause-analysis-guide/): A comprehensive guide on Root Cause Analysis (RCA) to effectively identify and solve problems at their source with practical tips and strategies.
- [Why 88% of AI Pilots Fail to Reach Production](https://leantechpro.com/the-capability-gap-killing-your-ai-pilot/): 88% of AI pilots never reach production. The problem isn’t technology, it’s capability. A Lean coaching framework to move your AI pilot from stuck to production.
- [The ‘Top Priority’ Problem: Why Engineering Teams Struggle With Delivery](https://leantechpro.com/the-top-priority-problem-why-engineering-teams-struggle-with-delivery/): Why do engineering teams still miss delivery targets even with great tools, AI, and skilled developers? This article exposes the hidden system issues, like WIP overload and broken flow, that block progress and shows how leaders can fix them with pull-based practices.
- [Why Your Dev Team Still Struggles With Delivery – Even With AI, Better Tools, and Great Engineers](https://leantechpro.com/why-your-dev-team-still-struggles-with-delivery-even-with-ai-better-tools-and-great-engineers/): Even with AI and great tools, many dev teams face delivery bottlenecks. This guide shows how to fix broken flow using Lean thinking and real examples.
- [The Hidden Cost of Vibe Coding: Why AI-Generated Code Creates Technical Debt](https://leantechpro.com/the-hidden-cost-of-vibe-coding-applying-lean-tech-to-reduce-technical-debt-in-ai-driven-teams/): Learn how ‘vibe coding’ with AI accelerates technical debt and how Lean Tech principles can help developers maintain code quality while still leveraging AI’s productivity benefits.
- [Beyond the SAFe Blueprint: A Pragmatist’s Guide to Value Streams](https://leantechpro.com/beyond-the-safe-blueprint-a-pragmatists-guide-to-value-streams/): When SAFe implementation meets business reality: Learn how value stream mapping provides a pragmatic path forward without disrupting your transformation momentum.
- [How We Cut a Support Backlog by 94% in 3 Months](https://leantechpro.com/support-backlog-reduction-case-study/): A government tech support team cut its e-services backlog by 94% and lifted citizen satisfaction from 6.2 to 8.5 in three months using Lean practices.

## Pages
- [The Delivery Playbook](https://leantechpro.com/newsletter/): Free weekly newsletter for engineering leaders: one diagnosis, one countermeasure, one real case. About 5 minutes to read.
- [Agentic System](https://leantechpro.com/agentic-system/): AGENTIC AI · HOW LEANTECHPRO RUNS One Operator. An Agentic Production System. LeanTechPro runs its content, research, and client deliverables on a set of AI agent skills I designed, built, and operate daily. Each skill encodes a working method as a standard. This page shows the system. I demo it live in 90 seconds. See […]
- [Workshop](https://leantechpro.com/workshop/): HALF-DAY WORKSHOP · FOR ENGINEERING LEADERS Your AI tools made coding faster.Delivery didn’t move. A half-day working session with your leadership team. We map where the speed leaks in your delivery system, find the constraint, and you leave with the redesign plan. Built on 15 years of measured turnarounds inside engineering and IT teams at […]
- [AI Delivery Guide](https://leantechpro.com/ai-delivery-guide/): Free Guide · AI & Delivery Performance Is Your Tech Delivery SystemReady for the AI Era? 7 diagnostic questions every CTO should ask right now, with the data, the blind spots, and a scoring framework to find where your delivery breaks down. What’s inside the guide A 12-page diagnostic framework built for engineering leaders managing […]
- [Delivery Flow Scorecard](https://leantechpro.com/delivery-flow-scorecard/): A free 2-minute diagnostic: 10 questions on how work flows through your team. Instant score, your #1 bottleneck, and a 3-step action plan.
- [Testimonials](https://leantechpro.com/testimonials/): These testimonials were given by professionals I’ve collaborated with through consulting engagements or subcontracting missions, and reflect their direct experience working with me on tech delivery improvement initiatives. – JL COSSI Client Testimonials Technology Leaders LinkedIn recommendation from February 2, 2024 LinkedIn recommendation from October 5, 2018 Tech Engineers LinkedIn recommendation from December 14, 2022 […]
- [Privacy Policy](https://leantechpro.com/privacy-policy/): Who we are KERYON, a French société par actions simplifiée (SAS), registered under SIREN 820 001 790 — RCS Paris, with its registered office at 58 rue de Monceau, 75008 Paris, France, provides management consulting services, including coaching and training. LeanTechPro is a brand of KERYON. Publication director: Jean-Luc Cossi. Our website address is: https://leantechpro.com. […]
- [About](https://leantechpro.com/about/): Jean-Luc Cossi Founder, LeanTechPro About Jean-Luc Cossi 15+ years fixing delivery problems inside tech teams at Michelin, BNP Paribas, Sodexo, and government agencies. Not from the sidelines. On the ground, with the team, until the numbers move. Before founding LeanTechPro, I led operational transformations in insurance, telecom, and digital services across Europe. I’ve worked with […]
- [Contact](https://leantechpro.com/contact/): Get in touch