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Stefan Zils | Arc & Digital Transformation Insights on Arc & Digital

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Lessons from Sports

Norway’s sports system, Brailsford’s marginal gains, and Kaizen and Agile methods show how change management succeeds: motivation, interdisciplinary thinking, and small continuous improvements lead to world-class results in sport and digital projects.

Kaulenbachtal

Discover the Kaulenbachtal valley: slate mining history, unique microclimate, hiking from Laubach, and the transformation of slate mining communities.

Development Risk

How simulated Sprint overruns, cancellation gates, and budget pressure expose hidden development cost — and why the cheapest feature can carry the steepest relative risk.

Risk Resilience

A practical look at portfolio risk for software backlogs: the four risk layers — development, market, component, global — and what happens to business value when each one fires.

Business Value

Business Value Floor 95 for software projects: the 5th percentile of simulated outcomes. Value at Risk reframed as reliably achievable value.

Feature Hypotheses Simulation

FHS is a small Python library that simulates 10,000 futures per feature hypothesis so Product Owners can prioritise on a numerical decision basis — expected value, Business Value Floor 95, worst case, VaR, CVaR and portfolio balance — built end-to-end as a vibe-coded financial test project.

Wilde Endert

Wilde Endert — narrow trails through the lower valley, with gorges, the Rausch waterfall and slate hills.

Dreimühlen Waterfall

Dreimühlen Waterfall — short walks for families, longer hikes and bike touring on the Kalkeifel-Radweg in the Eifel.

Ulmener Maar

Ulmener Maar — short hikes, a connecting tunnel to Jungfernweiher and birdwatching opportunities.

Learning Organizations

Book recommendation: a concise review of Uwe Vigenschow’s ‘Lernende Organisationen’ highlighting practical takeaways for organisational learning.

Eltz Valley

Discover the medieval castles of Eltz Valley on award-winning Traumpfade hiking trails. Start at Pyrmont Waterfall and explore Burg Eltz and Burg Pyrmont.

Key Insights from the Microsoft AI Tour 2025

I had the opportunity to participate in the Microsoft AI Tour, and it was exciting to see firsthand the experiences shared from real-life projects, particularly the Zava demo project. Microsoft AI Tour, Frankfurt Here are my key takeaways : AI will accelerate development and streamline business workflows. It can enhance software quality and security, but it’s crucial to remember that a human…

Lighthouse Score 100

This summer, I embarked on a journey to revise the layout of my blog. An update to my Hugo theme customization led to a significant increase in the complexity of the CSS structure. As a result, I faced layout breaks and received disappointing scores on Google’s PageSpeed Insights. Today, I proudly celebrate my achievement: my personal blog now boasts a perfect score of 100 points in both…

Developer Summit 2025: Insights from Berlin

Insights from Developer Summit 2025 in Berlin: DDD, legacy modernization, responsible architecture and AI.

Karabiner Elements

Karabiner Elements makes switching between Mac and Windows environments incredibly easy and is a preferred tool for long coding sessions.

EU Website Evidence Collector moves to code.europa.eu

Introducing the Free GDPR Compliance Helper The European Union has introduced an excellent resource: a free GDPR compliance tool. → Discover the tool . To use it in a DevOps pipeline is mentioned here: → Explore Automating GDPR Checks . Hosting Update The Website Evidence Collector has transitioned from GitHub to the EU’s GitLab-based platform at code.europa.eu . This move not only enhances…

Data in Motion Day 2024

I had the opportunity to participate in Data in Motion Day 2024 in Frankfurt, analyzing stream processing from a business analysis and enterprise architecture perspective. One of my primary takeaways is that stream processing extends beyond mere software frameworks and data management. It encourages a more profound comprehension of business operations and their specific domains. This understanding…

Agile Increment

What is an increment? - A Business Analysis Perspective Agile methods are standard in software development and are expected to produce results. The Scrum guide defines these results as increments. A manager in the software industry highlighted that her organization utilizes agile methods. However, she is interested in documenting the workshop outcomes rather than just engaging in agile…

Forgotten Knowledge

Software architecture documentation importance analyzed through historical perspective. Business analysis of knowledge preservation by Stefan Zils.

Javaland 2024, Nürburgring

A Java Software Development Conference Javaland Nürburgring (Eifel), 2024 In April, the German Java conference took place at the Nürburgring. It was a new and great experience. It was the first time that I did not have to plan a trip to learn about on-site software development. It’s amazing how life can come full circle. When I was a student, I used to listen to rock music at the Rock am…