Deborah Cannon, Host
INCOSE - Los Angeles Chapter
310-336-8341 Desk,
714-477-3755 Mobile


Tuesday, August 11th, 2020
From 5:15 PM to 7:30 PM PST

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This is an online event. 


INCOSE Los Angeles Chapter August 2020 Virtual Speaker Meeting

TOPIC:  "The Test Like You Fly (TLYF) Process – Creating Operationally Realistic Tests and finding Mission Critical Faults Before It’s Too Late" with Julie White, The Aerospace Corporation

WHEN:  Tuesday August 11th from 5:15 PM to 7:30 PM Pacific Time

COST:  Free

Virtual Venue: Skype meeting instructions will be emailed prior to the event and are included in your confirmation email message.  Slides will be available on the LA Chapter web site -

Abstract:   Test Like You Fly.  Test As You Fly.  Test Like You Operate.  Test Like You intend to Use the System.  The concept may be up to 500 years old, as something equivalent was used by the British Navy in the early 1500s when heavy cannons started to be mounted on ships for broadside attacks.  Naval engineers used this approach to testing to ensure that the new technology worked as intended in the modified heritage sailing vessels before committing them to battle.  Test Like You Fly (TLYF) has been part of aviation development, especially for the use of planes as weapons systems.  This terminology, sometimes known as “Test As You Fly” in NASA parlance, worked its way into space systems development, probably in the late 1970s or early 1980s.  However, the usage was fairly loose, meaning different things to different people.

The “Test Like You Fly” (TLYF) Process, developed by a government / industry team in 2007 – 2010, is based on an approach that is broader than “test.” We have come to define it as a pre-launch / pre-operational systems engineering process that translates mission operations concepts into operationally realistic tests intended to detect latent mission critical flaws that can only be revealed when used as it would be in use.

This brief introduction to the TLYF Process will highlight the concepts and principles that will be described in greater depth at my TLYF tutorial on Aug. 17 and 18, from 4-6:00 pm.   A review of space mission failures that led us to this process, a short explanation of the process methods, and several non-space conceptual applications will be included.  Please plan to join me for the TLYF Tutorial on Aug. 17 and 18 for a tutorial to apply these important principles.

BIO:  Julie White has been with The Aerospace Corporation for over 45 years.  She is currently a senior project leader in the Systems Integration & Test Office (SITO) of the Systems Engineering Division. She has extensive experience with requirements analysis, integration, test and operations.   She has helped architect “like you fly” “days in the life” tests for four USAF Space Test Program one-of-a-kind R&D missions.  She spent time analyzing trends and the engineering implications of serious and fatal on-orbit satellite anomalies that occurred over a 30 year period worldwide. The large number of serious anomalies whose escapes could have been prevented by consistent implementation of TLYF techniques was the motivation for creating a TLYF assessment and execution process.

She was a contributor to the 1st edition of the Space Vehicle Test and Evaluation Handbook (The Aerospace Corporation, 2006) and senior editor and contributor for the 2nd edition of this book (The Aerospace Corporation, 2011).  She has written and presented several international papers on the TLYF Process, as well as others on risk management, mission development, satellite End-of-Life trends, and other on-orbit mission results.  She holds a Bachelor’s degree in Physics and Astronomy from the University of Maryland, College Park, MD, and a Master’s degree in Astronomy from the University of Massachusetts, Amherst.