Author of the Method
Behind the Method
Christian Nennemann
Architect and author of the 3-Sets Method. Holder of the DPMA word mark (pending).
01
Why the method exists
The 3-Sets Method is the answer to a pattern that stayed the same across twenty years of IT work: investments that fail to convert into results. Six billion in education funding, tablets gathering dust in lockers. Seven-figure training budgets whose effects no longer show up months later. "We are agile now" on slide decks while teams continue to ship in waterfall. The one-third problem has a simple core: any set without the other two is wasted investment.
02
Professional background
Software engineering from development to architecture, requirements, security, test, technical and disciplinary team leadership. Currently engineering lead inside a regulated medical-device group, previously solution architect, security lead, and requirements manager. AEVO trainer qualification (IHK). Full bio at nennemann.de.
03
Theoretical lineage
The method sits in the tradition of action-theoretic models where outcome emerges from the interplay of person, behaviour, and environment — from Lewin (B = f(P, E)) to Anderson on knowledge transfer to situated cognition. The Tool · Skill · Mind split is a pragmatic heuristic from that lineage, not its invention. What is new here is the diagnostics: making it measurable which set caps the outcome in a concrete initiative.
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