Innovations and Milestones
For over 40 years, DSI has pioneered advanced Testability and Diagnostics technologies to solve the continuous growth in complex challenges in fault detection and isolation. These solutions begin with the design of new systems or history from legacy systems, with focus on Production, Operations and Sustainment with intelligent run-time testing and efficient guided maintenance. Through the years DSI relies on its ability to listen to customers and understand solution needs. This solution development involves actively being involved in state of the art technology.
Unparalleled in industry today, DSI continues to leverage our industry-wide experience to develop innovative, customer–oriented, tools and methods to solve real-world diagnostic challenges. While DSI does focus on real-world needs, we also look ahead for inclusion of technologies being studied. One such technology is prognostics development and Prognostic Health Management (PHM). While not yet mature, these capabilities have been included into the eXpress diagnostics predictive reporting capabilities. The following Timeline shows just a few of our developments over the years. There are also several major advancements in work, as this development continues to evolve into more powerful solutions.
Read expanded details on each innovation subject by selecting the related “Read More”.
Innovations 
Milestones 
Timeline
2018
Dynamic Reasoner for DSI Workbench
Introduction of dynamic reasoning for DSI Workbench to allow for real-time adaptability of diagnostics to the testing environment.
2012
eXpress64 Introduced to Provide 64-bit Support for Large System Diagnostic Design
eXpress64 introduced to provide 64-bit support for large system diagnostic design.
2010
Run Time Authoring Tool (RTAT)
Introduced the eXpress Run-Time Authoring Tool (RTAT) to assist in publishing eXpress diagnostics for real world troubleshooting.
2009
STAGE, by DSI, introduces simulation based assessment of diagnostic design
STAGE, by DSI, introduces simulation based assessment of diagnostic design.
2007
Diagnostics Based Failure Mode, Effects and Criticality Analysis (FMECA)
Diagnostics Based Failure Mode, Effects and Criticality Analysis (FMECA)
2004
Modeling it Both Ways: Hybrid Diagnostic Modeling and its Application to Hierarchical System Designs
Modeling it Both Ways: Hybrid Diagnostic Modeling and its Application to Hierarchical System Designs
2003
DSI together with Boeing, develop the largest known testability model
DSI together with Boeing, develop the largest known testability model
2002
First time integration of full FMECA capabilities (import, generation, export, and reporting) into a testability tool eXpress
First time integration of full FMECA capabilities (import, generation, export, and reporting) into a testability tool eXpress
2001
DSI Introduces DIAG-ML. A diagnostic data exchange XML format
DSI and Northrop Grumman team to make “IVHM”. A new industry-wide “household” term for future diagnostic requirements.
1998
eXpress becomes the first hybrid testability tool addressing both failure mode and functional dependencies
eXpress becomes the first hybrid testability tool addressing both failure mode and functional dependencies.
1996
DSI and TYX establish
DSI and TYX establish strategic partnering approach to test set development filling the void between design and system test eXpress by DSI becomes the first tool to employ the graphical approach to diagnostic modeling
1995
Integrating Testability Analysis Tools with ATS
Integrating Testability Analysis Tools with ATS
1994
“Father of Testability”, Ralph A. De Paul, Jr. receives “John Slattery Award”
“Father of Testability”, Ralph A. De Paul, Jr. receives “John Slattery Award”
1992
A Testability-Dependent Maintainability Prediction Technique
A Testability-Dependent Maintainability Prediction Technique
1991
DSI and Raytheon develop CAD/CAE Import to STAT (via MENTOR2STAT)
DSI and Raytheon develop CAD/CAE Import to STAT (via MENTOR2STAT)
1991
MIL-STD-1814 Integrated Diagnostic Standard released
MIL-STD-1814 Integrated Diagnostic Standard released. AI-ESTATE introduced.
1989
DSI Sub-contracted to co-develop WSTA
DSI Sub-contracted to co-develop WSTA. WSTA completed and available for U.S. DoD. TYX and DSI develop Testability to TPS interface (SPIFI)
1988
STAT (System Testability Analysis Tool) Licensed in U.S. and U.K
STAT (System Testability Analysis Tool) Licensed in U.S. and U.K
1987
Test Technology Information Center and Evaluation
This was an attempt by the Navy Metrology Engineering Center to evaluate tools for MIL-STD-2165 on a Benchmark mixed technology complex system. LOGMOD was considered the most mature and capable of any of the tools evaluated. Issue is, there was no follow on tool selection based on this evaluation. The future of Diagnostics standards was heading to a standstill.
1986
MIL-STD-2165 Released
The work of Ralph De Paul paid off to get the Testability requirements in the 2165 Testability Standard. This set the base for future program Testability needs. However, as of 1986, there still many areas which could be improved. From a proposal on Generic Integrated Diagnostics “Currently there are gaps in fault isolation and detection at all levels of maintenance: high false alarm rates, high “cannot duplicate” rates, and high “retest OK” rates. These problems must be resolved before any significant improvements in aircraft availability can be achieved.” Ironically, 30 years later in 2016, studies are being proposed to solve these issues. The solution has been there for 30 years and is more viable today than ever! But, what does it take to convince the customers to include the Diagnostic Solution in requirements to implement an existing and powerful solution? The cost of misdirected funds that have been allocated on Integrated Diagnostics solutions has been astronomical with little, if any real benefits to show from this!
1983 - 1985
SAMA-3 Fielded and Testability Standard Developed
SAMA-3 Model-Based Diagnostics applied to Crash Battle Damage Repair (CBD). At same time, DSI was under subcontract to U.S. Navy, to co-author MIL-STD-2165. This standardized uniform procedures and methods for establishing a testability program, for assessing testability in designs and for integration of testability into the acquisition process for electronic systems and equipment.
The Build vs. Buy Issue of High Development Cost and Inefficient Results
Other company’s development budgets pushed for internal research and development. While this sounds like a good path to pursue, the results diluted the Diagnostics technology development and removed much of the advancements within a centralized, focused development.
1981
Stand Alone Maintenance Aid (SAMA) Developed
Keeping up with Testability needs, DSI developed the SAMA Electronic Troubleshooting device for portable field level maintenance. At the same time,focus was being placed on achieving Testable Systems.
1980
ARINC, Now Rockwell Collins, a major provider of transport communications and systems engineering solutions, uses LOGMOD as Testability Tool.
ARINC, Now Rockwell Collins, a major provider of transport communications and systems engineering solutions, uses LOGMOD as Testability Tool.
1978
LOGMOD Diagnostics Final Test & Evaluation
The Department of the Air Force evaluated LOGMOD for improvement in Logistics Maintenance, including Technical Manual development for enhanced troubleshooting. This evaluation was very positive for using LOGMOD Diagnostic Design in developing advanced Logistics capabilities.
1978
LOGMOD Use Expanded
The latest Diagnostics technology in LOGMOD was provided to US Army and hosted at AMES Research Center. Automated Logic Test Structures from Logic Model was introduced.
1977
LOGMOD Hosted on Portable Computer
DSI developed a computer device and was first to host Diagnostic Software on a portable device. The U. S. Army Air Mobility Research and Development Laboratory promoted Logic Model Test Equipment.
1975 - 1976
Diagnostic Logic Model (LOGMOD) developed for Main Frame Computer
Multiple Failure Diagnostic Strategy introduced with LOGMOD first applied to a military application.
1972
Revised Mil-M-24100B
Ralph De Paul co-authored MIL-M-24100B to enhance the Testability design for Maintenance effectiveness. This Standard introduced the Functionally Oriented Maintenance Manuals (FOMM).
1967
Fault Isolation through Semi-Automatic Techniques (FIST)
Ralph De Paul introduced the automated techniques to develop intelligent Fault Isolation. This was the forerunner of today’s designing for “smart guided troubleshooting”.Ralph De Paul was recognized as bringing Logistics into the product design phase.Importance of Logistics Planning for Early Design Recognized.
1966
MIL-M-24100 Standard
Ralph De Paul was key in developing the first Maintenance Standard. Along with this Standard, Maintenance Dependency Charts and Design Disclosure Format were introduced.
1965
Logic Model Diagnostics Concept
The first ever Diagnostics Dependency Model and Functional Modeling. Developed by Ralph A. De Paul Jr., this began the concept of Diagnostics Design to place intelligence into testing. This began the evolution of enhanced technologies that formed the company known around the World as DSI International.
For over 40 years, DSI has pioneered advanced Testability and Diagnostics technologies to solve the continuous growth in complex challenges in fault detection and isolation. These solutions begin with the design of new systems or history from legacy systems, with focus on Production, Operations and Sustainment with intelligent run-time testing and efficient guided maintenance. Through the years DSI relies on its ability to listen to customers and understand solution needs. This solution development involves actively being involved in state of the art technology.
Unparalleled in industry today, DSI continues to leverage our industry-wide experience to develop innovative, customer–oriented, tools and methods to solve real-world diagnostic challenges. While DSI does focus on real-world needs, we also look ahead for inclusion of technologies being studied. One such technology is prognostics development and Prognostic Health Management (PHM). While not yet mature, these capabilities have been included into the eXpress diagnostics predictive reporting capabilities. The following Timeline shows just a few of our developments over the years. There are also several major advancements in work, as this development continues to evolve into more powerful solutions.
Read expanded details on each innovation subject by selecting the related “Read More”.
