Author of the Method
Behind the Method
Christian Nennemann
Architect and author of the 3sets Method. Holder of DPMA word mark "3sets" (No. 30 2026 226 110, registered).
01
Why the method exists
The 3sets 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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