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Index/Engineering & DevTools/GOTO - The Brightest Minds in Tech
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Model-Based Systems Eng. & Requirements Definition • Dennis Hansen & Jorge Orellana

GOTO - The Brightest Minds in Tech · 2026-07-03 · 23 min

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Episode notes

This interview was recorded for the GOTO Book Club. Dennis Hansen - Air Force Veteran, Chief Systems Engineer & Author of "Model-Based Systems Engineering and Requirements Definition" Jorge Orellana - Model Based Systems Engineer at IERUS Technologies & CEO & Founder at SCATTERBRAINS Check out more here: RESOURCES Jorge DESCRIPTION Dennis Hansen brings over six decades of systems engineering experience to this GOTO Book Club conversation - from Air Force airborne navigation technician to Chief Systems Engineer at L3Harris on programs including the complete rebuild of the GOES-R ground system for NOAA and NASA. His book argues that the fundamental failure mode in complex system development is the same every time: requirements are defined too loosely, too late, or across multiple model layers simultaneously. He structures the approach using an onion model - a layering framework he was taught by a Motorola engineer in 1961 - where each layer (mission, capabilities, activities, technical requirements, specifications) must be completed before the next is begun.

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