The DDD Dream? A Domain Expert Full-Time in a Mob 🚀
Feb 10, 2025
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Discover whether having a full-time domain expert in a Mob truly embodies the DDD dream. Explore the trade-offs of quick access versus full immersion and hear real-world stories of product owners that illustrate the impact on team effectiveness. Delve into the advantages of faster decisions and deeper collaboration paired with potential downsides, such as staying current in their field. The discussion also highlights the synergy of domain expertise with agile mob programming and the critical role effective naming plays in enhancing software development clarity.
Embedding a domain expert in a Mob significantly enhances decision-making speed and overall team productivity through immediate access to their expertise.
The integration of a domain expert fosters better alignment of code terminology with real-world applications, improving maintainability and user requirement reflection.
Deep dives
The Value of Full-Time Domain Experts in Teams
Having a domain expert fully engaged with the team fosters tighter feedback loops and enhances productivity. Teams that mob with a domain expert available at all times experience immediate responses to inquiries, leading to faster decision-making. For instance, when a question arises about the functionality or features, the expert’s presence allows for real-time clarifications, reducing downtime significantly. This dynamic creates an environment where the collective knowledge is readily accessible, ultimately boosting the team's efficiency.
Impact of Domain Knowledge on Code Quality
Incorporating a domain expert directly into the programming process ensures that the terminology used aligns with real-world applications. This alignment helps in avoiding misleading names in the code, as the expert can provide instant feedback on naming conventions during development. Such immediate corrections lead to a more coherent codebase, where the narrative fits the domain language, increasing overall maintainability. This integration also enhances test cases, as the domain expert can contribute to creating scenarios that better reflect true user requirements.
Business Knowledge and Developer Collaboration
The collaboration between developers and domain experts leads to an enriched learning experience for both parties. As developers work closely with domain experts, they gain insights into the business context, while domain experts improve their technical understanding. This cross-pollination of knowledge enhances the ideation process for test cases and quality assurance, causing cycle times to decrease and productivity to rise. Ultimately, maintaining a diverse knowledge base within a mob programming setup is crucial for long-term success and adaptation to changing domain requirements.
Is the ultimate Domain-Driven Design (DDD) dream having a domain expert fully embedded in a Mob? Or does it come with hidden trade-offs? In this thought-provoking episode of the Mob Mentality Show, we explore the benefits, challenges, and real-world experiences of having a domain expert (or product owner) participate full-time in a Mob—not just as a consultant but as an active driver and navigator.
🔹 What We Discuss in This Episode:
✅ Quick Access vs. Full-Time Participation – Is it better to have a domain expert available when needed or fully immersed in the Mob?
✅ Real-World Stories – Chris shares insights from four product owners with different availability levels and how that impacted effectiveness. Austin reveals what happened when a domain expert became a full-time Mobber.
✅ The Pros of a Full-Time Domain Expert in a Mob – Faster decisions, deeper collaboration, improved knowledge transfer, and more!
✅ Natural Synergy with DDD – How DDD experts seamlessly jump into code naming, improving model alignment.
✅ Testers & Domain Experts: A Similar Integration? – The parallels between merging testers into a Mob and embedding domain experts.
✅ Potential Downsides – Does being in the Mob full-time reduce a domain expert’s ability to stay ahead in their field?
✅ Autonomy & Learning Diversity – How does this setup impact team growth and decision-making?
✅ Is This the DDD Dream? – With fewer moving parts (like event storming), does a domain expert in the Mob make DDD even more effective?
✅ The Power of Different Perspectives – Why having a built-in devil’s advocate can enhance team decision-making.
✅ The Truth About Cryptic Code – Can a domain expert help clarify unclear code in real time?
🎧 Don’t Miss This Insightful Discussion!
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What do you think? Would you want a domain expert full-time in your Mob? Drop a comment below! ⬇️