Published works
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Method · August 2025
User Experience Inventory (UXINV)
A problem-solving method that compares alignment between user experience and user expectations. Use cases: identifying user experience risk, improving customer experience, adversarial response.
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Method · August 2025
Time Boundary Model (TBM)
A problem-solving method that sets the timing of control implementation to occur before related threat exposure. Use cases: rapid evaluation of novel threats, compliance documentation, individual device users without IT support.
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Method · August 2025
Objective Threat Model (OTM)
A problem-solving method that emphasizes impacts and outcomes of threats over the technical mechanisms of attack. Use cases: risk triage, risk analysis including business risk and non-technical risks.
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Method · August 2025
Resource Constrained Action Model (RCAM)
A problem-solving method to build actionable understanding of resource problems and adequately consider the solution space. Use cases: supply/time/budget limits, customer attrition, solution optimization.
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Method · August 2025
Event Condition Timeline (ECT)
A problem-solving method to align timelines across analytic methods. Use cases: process maps, customer journey maps, user experience maps, diagnostic timelines.
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Method · 2024, revised June 2025
Download Experience Component Inventory (DLXCI)
A method to understand risk in digital supply chains, such as those used in open source software. Use cases: design/implementation, audit, optimizing security or reliability.
About
Jacob has served as a Senior Director and Principal Engineer. Since 1997, he has managed risk in open source supply chains through operating system distributions, hosting infrastructure, enterprise risk management, and software engineering. His experience ranges from board-level projects to detailed technical work.
He is certified in risk management (ISACA CRISC), complex project management (Lean Six Sigma Black Belt), critical thinking (Pherson Intelligence Analysis Professional), and user experience (NN/g User Experience Master Certification).
Current areas of research include open source supply chain security, software longevity practices, OpenBSD upgrades, C language software development practices, macOS and iOS hardening, monitoring and alerting systems, offline AI, and human oversight of AI.
Full career history on LinkedIn.
Contact
op1digital is Jacob's practice; he accepts a small number of engagements, each of which begins with an email. Write a few sentences about your situation to [email protected]. No cold calls, no cold email.